/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:58:16,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:58:16,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:58:17,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:58:17,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 21:58:17,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:58:17,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:58:17,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:58:17,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:58:17,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:58:17,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:58:17,060 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:58:17,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:58:17,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:58:17,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:58:17,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:58:17,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:58:17,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:58:17,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:58:17,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:58:17,061 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:58:17,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:58:17,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:58:17,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:58:17,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:58:17,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:58:17,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:58:17,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:58:17,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:58:17,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:58:17,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:58:17,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:58:17,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:58:17,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:58:17,063 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:58:17,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:58:17,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:58:17,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:58:17,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:58:17,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:58:17,383 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:58:17,385 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:58:17,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl [2021-03-10 21:58:17,387 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl' [2021-03-10 21:58:17,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:58:17,437 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:58:17,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:58:17,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:58:17,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:58:17,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... [2021-03-10 21:58:17,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... [2021-03-10 21:58:17,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:58:17,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:58:17,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:58:17,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:58:17,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... [2021-03-10 21:58:17,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... [2021-03-10 21:58:17,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... [2021-03-10 21:58:17,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... [2021-03-10 21:58:17,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... [2021-03-10 21:58:17,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... [2021-03-10 21:58:17,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... [2021-03-10 21:58:17,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:58:17,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:58:17,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:58:17,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:58:17,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:58:17,562 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:58:17,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:58:17,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:58:17,564 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:58:17,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:58:17,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:58:17,564 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:58:17,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:58:17,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:58:17,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 21:58:17,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 21:58:17,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 21:58:17,566 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:58:18,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:58:18,060 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-03-10 21:58:18,062 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:58:18 BoogieIcfgContainer [2021-03-10 21:58:18,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:58:18,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:58:18,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:58:18,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:58:18,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:58:17" (1/2) ... [2021-03-10 21:58:18,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1eb0ee and model type name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:58:18, skipping insertion in model container [2021-03-10 21:58:18,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:58:18" (2/2) ... [2021-03-10 21:58:18,068 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-subst.wvr.bpl [2021-03-10 21:58:18,073 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:58:18,073 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:58:18,077 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:58:18,078 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:58:18,111 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 21:58:18,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 21:58:18,141 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:58:18,142 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:58:18,142 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:58:18,142 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:58:18,142 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:58:18,142 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:58:18,142 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:58:18,142 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:58:18,151 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-03-10 21:58:18,164 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:18,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:18,175 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:18,175 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:18,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-03-10 21:58:18,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:18,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109119353] [2021-03-10 21:58:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:18,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109119353] [2021-03-10 21:58:18,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:18,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:18,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541970959] [2021-03-10 21:58:18,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:18,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:18,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:18,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:18,550 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:18,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:18,941 INFO L93 Difference]: Finished difference Result 399 states and 1111 transitions. [2021-03-10 21:58:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:58:18,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:18,959 INFO L225 Difference]: With dead ends: 399 [2021-03-10 21:58:18,959 INFO L226 Difference]: Without dead ends: 357 [2021-03-10 21:58:18,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:58:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-03-10 21:58:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 147. [2021-03-10 21:58:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.863013698630137) internal successors, (418), 146 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 418 transitions. [2021-03-10 21:58:19,004 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 418 transitions. Word has length 17 [2021-03-10 21:58:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:19,005 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 418 transitions. [2021-03-10 21:58:19,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 418 transitions. [2021-03-10 21:58:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:19,007 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:19,007 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:19,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:58:19,007 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:19,008 INFO L82 PathProgramCache]: Analyzing trace with hash 540971640, now seen corresponding path program 2 times [2021-03-10 21:58:19,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:19,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942745700] [2021-03-10 21:58:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:19,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942745700] [2021-03-10 21:58:19,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:19,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:19,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822644482] [2021-03-10 21:58:19,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:19,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:19,144 INFO L87 Difference]: Start difference. First operand 147 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:19,425 INFO L93 Difference]: Finished difference Result 375 states and 1007 transitions. [2021-03-10 21:58:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:19,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:19,428 INFO L225 Difference]: With dead ends: 375 [2021-03-10 21:58:19,429 INFO L226 Difference]: Without dead ends: 353 [2021-03-10 21:58:19,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-03-10 21:58:19,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 171. [2021-03-10 21:58:19,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.864705882352941) internal successors, (487), 170 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 487 transitions. [2021-03-10 21:58:19,449 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 487 transitions. Word has length 17 [2021-03-10 21:58:19,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:19,450 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 487 transitions. [2021-03-10 21:58:19,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 487 transitions. [2021-03-10 21:58:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:19,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:19,451 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:19,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:58:19,452 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:19,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1605199120, now seen corresponding path program 3 times [2021-03-10 21:58:19,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:19,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477197103] [2021-03-10 21:58:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:19,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477197103] [2021-03-10 21:58:19,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:19,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:19,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608409244] [2021-03-10 21:58:19,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:19,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:19,572 INFO L87 Difference]: Start difference. First operand 171 states and 487 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:19,782 INFO L93 Difference]: Finished difference Result 358 states and 984 transitions. [2021-03-10 21:58:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:19,785 INFO L225 Difference]: With dead ends: 358 [2021-03-10 21:58:19,785 INFO L226 Difference]: Without dead ends: 336 [2021-03-10 21:58:19,785 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-03-10 21:58:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 180. [2021-03-10 21:58:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.8547486033519553) internal successors, (511), 179 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 511 transitions. [2021-03-10 21:58:19,801 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 511 transitions. Word has length 17 [2021-03-10 21:58:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:19,801 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 511 transitions. [2021-03-10 21:58:19,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 511 transitions. [2021-03-10 21:58:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:19,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:19,803 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:19,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:58:19,803 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:19,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1741639554, now seen corresponding path program 4 times [2021-03-10 21:58:19,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:19,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921004149] [2021-03-10 21:58:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:19,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921004149] [2021-03-10 21:58:19,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:19,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:19,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150777622] [2021-03-10 21:58:19,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:19,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:19,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:19,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:19,938 INFO L87 Difference]: Start difference. First operand 180 states and 511 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:20,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:20,241 INFO L93 Difference]: Finished difference Result 473 states and 1274 transitions. [2021-03-10 21:58:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:20,244 INFO L225 Difference]: With dead ends: 473 [2021-03-10 21:58:20,245 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 21:58:20,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 21:58:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 182. [2021-03-10 21:58:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.8784530386740332) internal successors, (521), 181 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 521 transitions. [2021-03-10 21:58:20,255 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 521 transitions. Word has length 17 [2021-03-10 21:58:20,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:20,256 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 521 transitions. [2021-03-10 21:58:20,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 521 transitions. [2021-03-10 21:58:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:20,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:20,257 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:20,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:58:20,258 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:20,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1412132048, now seen corresponding path program 5 times [2021-03-10 21:58:20,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:20,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324269331] [2021-03-10 21:58:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:20,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324269331] [2021-03-10 21:58:20,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:20,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:20,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654608921] [2021-03-10 21:58:20,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:20,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:20,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:20,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:20,403 INFO L87 Difference]: Start difference. First operand 182 states and 521 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:20,697 INFO L93 Difference]: Finished difference Result 489 states and 1347 transitions. [2021-03-10 21:58:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:20,700 INFO L225 Difference]: With dead ends: 489 [2021-03-10 21:58:20,700 INFO L226 Difference]: Without dead ends: 474 [2021-03-10 21:58:20,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-03-10 21:58:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 194. [2021-03-10 21:58:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9740932642487046) internal successors, (574), 193 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-03-10 21:58:20,710 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-03-10 21:58:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:20,711 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-03-10 21:58:20,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-03-10 21:58:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:20,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:20,712 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:20,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:58:20,712 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash -845179968, now seen corresponding path program 6 times [2021-03-10 21:58:20,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:20,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374209252] [2021-03-10 21:58:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:20,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374209252] [2021-03-10 21:58:20,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:20,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:20,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650560641] [2021-03-10 21:58:20,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:20,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:20,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:20,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:20,825 INFO L87 Difference]: Start difference. First operand 194 states and 574 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:21,112 INFO L93 Difference]: Finished difference Result 484 states and 1349 transitions. [2021-03-10 21:58:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:21,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:21,116 INFO L225 Difference]: With dead ends: 484 [2021-03-10 21:58:21,116 INFO L226 Difference]: Without dead ends: 469 [2021-03-10 21:58:21,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-10 21:58:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 204. [2021-03-10 21:58:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 3.0689655172413794) internal successors, (623), 203 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 623 transitions. [2021-03-10 21:58:21,127 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 623 transitions. Word has length 17 [2021-03-10 21:58:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:21,127 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 623 transitions. [2021-03-10 21:58:21,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 623 transitions. [2021-03-10 21:58:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:21,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:21,128 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:21,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 21:58:21,129 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash -119789648, now seen corresponding path program 7 times [2021-03-10 21:58:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:21,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115460083] [2021-03-10 21:58:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:21,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115460083] [2021-03-10 21:58:21,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:21,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:21,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881795469] [2021-03-10 21:58:21,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:21,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:21,244 INFO L87 Difference]: Start difference. First operand 204 states and 623 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:21,449 INFO L93 Difference]: Finished difference Result 456 states and 1271 transitions. [2021-03-10 21:58:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:58:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:21,452 INFO L225 Difference]: With dead ends: 456 [2021-03-10 21:58:21,452 INFO L226 Difference]: Without dead ends: 418 [2021-03-10 21:58:21,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-03-10 21:58:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 206. [2021-03-10 21:58:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 3.073170731707317) internal successors, (630), 205 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 630 transitions. [2021-03-10 21:58:21,463 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 630 transitions. Word has length 17 [2021-03-10 21:58:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:21,463 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 630 transitions. [2021-03-10 21:58:21,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 630 transitions. [2021-03-10 21:58:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:21,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:21,465 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:21,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 21:58:21,466 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:21,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:21,466 INFO L82 PathProgramCache]: Analyzing trace with hash -996778424, now seen corresponding path program 8 times [2021-03-10 21:58:21,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:21,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723602023] [2021-03-10 21:58:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:21,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723602023] [2021-03-10 21:58:21,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:21,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:21,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111543509] [2021-03-10 21:58:21,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:21,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:21,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:21,570 INFO L87 Difference]: Start difference. First operand 206 states and 630 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:21,749 INFO L93 Difference]: Finished difference Result 428 states and 1216 transitions. [2021-03-10 21:58:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:58:21,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:21,751 INFO L225 Difference]: With dead ends: 428 [2021-03-10 21:58:21,752 INFO L226 Difference]: Without dead ends: 390 [2021-03-10 21:58:21,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-03-10 21:58:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 208. [2021-03-10 21:58:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 3.077294685990338) internal successors, (637), 207 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 637 transitions. [2021-03-10 21:58:21,760 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 637 transitions. Word has length 17 [2021-03-10 21:58:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:21,762 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 637 transitions. [2021-03-10 21:58:21,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 637 transitions. [2021-03-10 21:58:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:21,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:21,765 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:21,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 21:58:21,765 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:21,766 INFO L82 PathProgramCache]: Analyzing trace with hash 19598974, now seen corresponding path program 9 times [2021-03-10 21:58:21,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:21,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990069870] [2021-03-10 21:58:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:21,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990069870] [2021-03-10 21:58:21,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:21,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:21,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079200546] [2021-03-10 21:58:21,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:21,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:21,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:21,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:21,888 INFO L87 Difference]: Start difference. First operand 208 states and 637 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:22,117 INFO L93 Difference]: Finished difference Result 496 states and 1398 transitions. [2021-03-10 21:58:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:22,120 INFO L225 Difference]: With dead ends: 496 [2021-03-10 21:58:22,120 INFO L226 Difference]: Without dead ends: 481 [2021-03-10 21:58:22,121 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-03-10 21:58:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 212. [2021-03-10 21:58:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.09478672985782) internal successors, (653), 211 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 653 transitions. [2021-03-10 21:58:22,136 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 653 transitions. Word has length 17 [2021-03-10 21:58:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:22,137 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 653 transitions. [2021-03-10 21:58:22,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 653 transitions. [2021-03-10 21:58:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:22,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:22,138 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:22,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 21:58:22,138 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:22,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:22,138 INFO L82 PathProgramCache]: Analyzing trace with hash 586551054, now seen corresponding path program 10 times [2021-03-10 21:58:22,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:22,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021898560] [2021-03-10 21:58:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:22,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021898560] [2021-03-10 21:58:22,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:22,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:22,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950621253] [2021-03-10 21:58:22,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:22,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:22,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:22,233 INFO L87 Difference]: Start difference. First operand 212 states and 653 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:22,449 INFO L93 Difference]: Finished difference Result 496 states and 1385 transitions. [2021-03-10 21:58:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:22,454 INFO L225 Difference]: With dead ends: 496 [2021-03-10 21:58:22,455 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 21:58:22,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 21:58:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 215. [2021-03-10 21:58:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.102803738317757) internal successors, (664), 214 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 664 transitions. [2021-03-10 21:58:22,464 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 664 transitions. Word has length 17 [2021-03-10 21:58:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:22,464 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 664 transitions. [2021-03-10 21:58:22,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 664 transitions. [2021-03-10 21:58:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:22,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:22,465 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:22,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:58:22,466 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:22,466 INFO L82 PathProgramCache]: Analyzing trace with hash 15096248, now seen corresponding path program 11 times [2021-03-10 21:58:22,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:22,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588671748] [2021-03-10 21:58:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:22,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588671748] [2021-03-10 21:58:22,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:22,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:22,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235115283] [2021-03-10 21:58:22,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:22,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:22,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:22,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:22,582 INFO L87 Difference]: Start difference. First operand 215 states and 664 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:22,810 INFO L93 Difference]: Finished difference Result 501 states and 1393 transitions. [2021-03-10 21:58:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:22,813 INFO L225 Difference]: With dead ends: 501 [2021-03-10 21:58:22,813 INFO L226 Difference]: Without dead ends: 474 [2021-03-10 21:58:22,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-03-10 21:58:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 215. [2021-03-10 21:58:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.088785046728972) internal successors, (661), 214 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 661 transitions. [2021-03-10 21:58:22,821 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 661 transitions. Word has length 17 [2021-03-10 21:58:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:22,821 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 661 transitions. [2021-03-10 21:58:22,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 661 transitions. [2021-03-10 21:58:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:22,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:22,822 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:22,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 21:58:22,823 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:22,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1192892344, now seen corresponding path program 12 times [2021-03-10 21:58:22,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:22,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390103804] [2021-03-10 21:58:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:22,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390103804] [2021-03-10 21:58:22,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:22,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:22,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793969181] [2021-03-10 21:58:22,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:22,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:22,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:22,941 INFO L87 Difference]: Start difference. First operand 215 states and 661 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:23,198 INFO L93 Difference]: Finished difference Result 511 states and 1453 transitions. [2021-03-10 21:58:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:23,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:23,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:23,201 INFO L225 Difference]: With dead ends: 511 [2021-03-10 21:58:23,201 INFO L226 Difference]: Without dead ends: 496 [2021-03-10 21:58:23,201 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-03-10 21:58:23,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 215. [2021-03-10 21:58:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.088785046728972) internal successors, (661), 214 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 661 transitions. [2021-03-10 21:58:23,211 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 661 transitions. Word has length 17 [2021-03-10 21:58:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:23,211 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 661 transitions. [2021-03-10 21:58:23,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 661 transitions. [2021-03-10 21:58:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:23,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:23,212 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:23,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 21:58:23,213 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1759844424, now seen corresponding path program 13 times [2021-03-10 21:58:23,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:23,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320986332] [2021-03-10 21:58:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:23,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320986332] [2021-03-10 21:58:23,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:23,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:23,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539967973] [2021-03-10 21:58:23,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:23,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:23,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:23,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:23,335 INFO L87 Difference]: Start difference. First operand 215 states and 661 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:23,587 INFO L93 Difference]: Finished difference Result 521 states and 1494 transitions. [2021-03-10 21:58:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:23,590 INFO L225 Difference]: With dead ends: 521 [2021-03-10 21:58:23,590 INFO L226 Difference]: Without dead ends: 506 [2021-03-10 21:58:23,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-10 21:58:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 219. [2021-03-10 21:58:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 3.114678899082569) internal successors, (679), 218 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 679 transitions. [2021-03-10 21:58:23,599 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 679 transitions. Word has length 17 [2021-03-10 21:58:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:23,600 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 679 transitions. [2021-03-10 21:58:23,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 679 transitions. [2021-03-10 21:58:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:23,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:23,601 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:23,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 21:58:23,601 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1809732552, now seen corresponding path program 14 times [2021-03-10 21:58:23,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:23,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089225375] [2021-03-10 21:58:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:23,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089225375] [2021-03-10 21:58:23,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:23,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:23,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031216930] [2021-03-10 21:58:23,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:23,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:23,680 INFO L87 Difference]: Start difference. First operand 219 states and 679 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:23,854 INFO L93 Difference]: Finished difference Result 494 states and 1402 transitions. [2021-03-10 21:58:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:58:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:23,857 INFO L225 Difference]: With dead ends: 494 [2021-03-10 21:58:23,857 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 21:58:23,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 21:58:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 219. [2021-03-10 21:58:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 3.114678899082569) internal successors, (679), 218 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 679 transitions. [2021-03-10 21:58:23,867 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 679 transitions. Word has length 17 [2021-03-10 21:58:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:23,867 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 679 transitions. [2021-03-10 21:58:23,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 679 transitions. [2021-03-10 21:58:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:23,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:23,868 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:23,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-10 21:58:23,869 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:23,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1608245968, now seen corresponding path program 15 times [2021-03-10 21:58:23,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:23,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803638283] [2021-03-10 21:58:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:23,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803638283] [2021-03-10 21:58:23,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:23,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:23,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138486843] [2021-03-10 21:58:23,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:23,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:23,974 INFO L87 Difference]: Start difference. First operand 219 states and 679 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:24,170 INFO L93 Difference]: Finished difference Result 502 states and 1422 transitions. [2021-03-10 21:58:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:58:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:24,173 INFO L225 Difference]: With dead ends: 502 [2021-03-10 21:58:24,173 INFO L226 Difference]: Without dead ends: 464 [2021-03-10 21:58:24,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-03-10 21:58:24,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 218. [2021-03-10 21:58:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.1013824884792625) internal successors, (673), 217 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 673 transitions. [2021-03-10 21:58:24,181 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 673 transitions. Word has length 17 [2021-03-10 21:58:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:24,181 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 673 transitions. [2021-03-10 21:58:24,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 673 transitions. [2021-03-10 21:58:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:24,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:24,184 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:24,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-10 21:58:24,185 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2013826360, now seen corresponding path program 16 times [2021-03-10 21:58:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:24,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658060080] [2021-03-10 21:58:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:24,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658060080] [2021-03-10 21:58:24,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:24,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:24,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522507303] [2021-03-10 21:58:24,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:24,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:24,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:24,291 INFO L87 Difference]: Start difference. First operand 218 states and 673 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:24,472 INFO L93 Difference]: Finished difference Result 454 states and 1289 transitions. [2021-03-10 21:58:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:24,475 INFO L225 Difference]: With dead ends: 454 [2021-03-10 21:58:24,475 INFO L226 Difference]: Without dead ends: 427 [2021-03-10 21:58:24,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-03-10 21:58:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 220. [2021-03-10 21:58:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 3.095890410958904) internal successors, (678), 219 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 678 transitions. [2021-03-10 21:58:24,483 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 678 transitions. Word has length 17 [2021-03-10 21:58:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:24,483 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 678 transitions. [2021-03-10 21:58:24,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 678 transitions. [2021-03-10 21:58:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:24,484 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:24,484 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:24,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-10 21:58:24,484 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:24,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:24,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1646485530, now seen corresponding path program 17 times [2021-03-10 21:58:24,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:24,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518262961] [2021-03-10 21:58:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:24,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518262961] [2021-03-10 21:58:24,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:24,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:24,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922609065] [2021-03-10 21:58:24,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:24,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:24,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:24,565 INFO L87 Difference]: Start difference. First operand 220 states and 678 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:24,802 INFO L93 Difference]: Finished difference Result 460 states and 1314 transitions. [2021-03-10 21:58:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:24,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:24,804 INFO L225 Difference]: With dead ends: 460 [2021-03-10 21:58:24,804 INFO L226 Difference]: Without dead ends: 445 [2021-03-10 21:58:24,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-03-10 21:58:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 228. [2021-03-10 21:58:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.101321585903084) internal successors, (704), 227 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 704 transitions. [2021-03-10 21:58:24,811 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 704 transitions. Word has length 17 [2021-03-10 21:58:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:24,811 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 704 transitions. [2021-03-10 21:58:24,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 704 transitions. [2021-03-10 21:58:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:24,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:24,812 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:24,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-10 21:58:24,812 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:24,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1567844280, now seen corresponding path program 18 times [2021-03-10 21:58:24,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:24,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448820411] [2021-03-10 21:58:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:24,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448820411] [2021-03-10 21:58:24,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:24,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:24,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784603062] [2021-03-10 21:58:24,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:24,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:24,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:24,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:24,897 INFO L87 Difference]: Start difference. First operand 228 states and 704 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:25,091 INFO L93 Difference]: Finished difference Result 428 states and 1221 transitions. [2021-03-10 21:58:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:25,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:25,093 INFO L225 Difference]: With dead ends: 428 [2021-03-10 21:58:25,093 INFO L226 Difference]: Without dead ends: 406 [2021-03-10 21:58:25,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-03-10 21:58:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 230. [2021-03-10 21:58:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.1179039301310043) internal successors, (714), 229 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 714 transitions. [2021-03-10 21:58:25,102 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 714 transitions. Word has length 17 [2021-03-10 21:58:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:25,102 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 714 transitions. [2021-03-10 21:58:25,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 714 transitions. [2021-03-10 21:58:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:25,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:25,103 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:25,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-10 21:58:25,103 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1897351786, now seen corresponding path program 19 times [2021-03-10 21:58:25,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:25,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241100357] [2021-03-10 21:58:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:25,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241100357] [2021-03-10 21:58:25,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:25,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:25,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824054421] [2021-03-10 21:58:25,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:25,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:25,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:25,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:25,197 INFO L87 Difference]: Start difference. First operand 230 states and 714 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:25,421 INFO L93 Difference]: Finished difference Result 479 states and 1351 transitions. [2021-03-10 21:58:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:25,423 INFO L225 Difference]: With dead ends: 479 [2021-03-10 21:58:25,423 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 21:58:25,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 21:58:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 231. [2021-03-10 21:58:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.130434782608696) internal successors, (720), 230 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 720 transitions. [2021-03-10 21:58:25,431 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 720 transitions. Word has length 17 [2021-03-10 21:58:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:25,431 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 720 transitions. [2021-03-10 21:58:25,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 720 transitions. [2021-03-10 21:58:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:25,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:25,432 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:25,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-10 21:58:25,432 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:25,432 INFO L82 PathProgramCache]: Analyzing trace with hash -773277742, now seen corresponding path program 20 times [2021-03-10 21:58:25,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:25,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129280670] [2021-03-10 21:58:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:25,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129280670] [2021-03-10 21:58:25,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:25,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:58:25,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848839888] [2021-03-10 21:58:25,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:58:25,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:25,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:58:25,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:58:25,490 INFO L87 Difference]: Start difference. First operand 231 states and 720 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:25,590 INFO L93 Difference]: Finished difference Result 404 states and 1189 transitions. [2021-03-10 21:58:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:58:25,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:25,592 INFO L225 Difference]: With dead ends: 404 [2021-03-10 21:58:25,592 INFO L226 Difference]: Without dead ends: 381 [2021-03-10 21:58:25,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-03-10 21:58:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 238. [2021-03-10 21:58:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 3.1940928270042193) internal successors, (757), 237 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 757 transitions. [2021-03-10 21:58:25,599 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 757 transitions. Word has length 17 [2021-03-10 21:58:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:25,599 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 757 transitions. [2021-03-10 21:58:25,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 757 transitions. [2021-03-10 21:58:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:25,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:25,600 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:25,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-10 21:58:25,600 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:25,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1982261886, now seen corresponding path program 21 times [2021-03-10 21:58:25,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:25,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73789252] [2021-03-10 21:58:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:25,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73789252] [2021-03-10 21:58:25,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:25,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:58:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085106782] [2021-03-10 21:58:25,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:58:25,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:58:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:58:25,665 INFO L87 Difference]: Start difference. First operand 238 states and 757 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:25,782 INFO L93 Difference]: Finished difference Result 359 states and 1083 transitions. [2021-03-10 21:58:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:58:25,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:25,784 INFO L225 Difference]: With dead ends: 359 [2021-03-10 21:58:25,784 INFO L226 Difference]: Without dead ends: 336 [2021-03-10 21:58:25,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:58:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-03-10 21:58:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 242. [2021-03-10 21:58:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.190871369294606) internal successors, (769), 241 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 769 transitions. [2021-03-10 21:58:25,789 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 769 transitions. Word has length 17 [2021-03-10 21:58:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:25,790 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 769 transitions. [2021-03-10 21:58:25,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 769 transitions. [2021-03-10 21:58:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:25,792 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:25,792 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:25,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-10 21:58:25,792 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1814506960, now seen corresponding path program 22 times [2021-03-10 21:58:25,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:25,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148957117] [2021-03-10 21:58:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:25,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148957117] [2021-03-10 21:58:25,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:25,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:25,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088267286] [2021-03-10 21:58:25,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:25,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:25,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:25,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:25,902 INFO L87 Difference]: Start difference. First operand 242 states and 769 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:26,129 INFO L93 Difference]: Finished difference Result 455 states and 1345 transitions. [2021-03-10 21:58:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:26,131 INFO L225 Difference]: With dead ends: 455 [2021-03-10 21:58:26,131 INFO L226 Difference]: Without dead ends: 440 [2021-03-10 21:58:26,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-03-10 21:58:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 247. [2021-03-10 21:58:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 3.207317073170732) internal successors, (789), 246 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 789 transitions. [2021-03-10 21:58:26,139 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 789 transitions. Word has length 17 [2021-03-10 21:58:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:26,139 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 789 transitions. [2021-03-10 21:58:26,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 789 transitions. [2021-03-10 21:58:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:26,140 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:26,140 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:26,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-10 21:58:26,140 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:26,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1247554880, now seen corresponding path program 23 times [2021-03-10 21:58:26,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:26,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046655794] [2021-03-10 21:58:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:26,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046655794] [2021-03-10 21:58:26,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:26,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:26,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698639301] [2021-03-10 21:58:26,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:26,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:26,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:26,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:26,218 INFO L87 Difference]: Start difference. First operand 247 states and 789 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:26,468 INFO L93 Difference]: Finished difference Result 455 states and 1332 transitions. [2021-03-10 21:58:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:26,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:26,471 INFO L225 Difference]: With dead ends: 455 [2021-03-10 21:58:26,471 INFO L226 Difference]: Without dead ends: 434 [2021-03-10 21:58:26,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-03-10 21:58:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 247. [2021-03-10 21:58:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 3.207317073170732) internal successors, (789), 246 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 789 transitions. [2021-03-10 21:58:26,478 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 789 transitions. Word has length 17 [2021-03-10 21:58:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:26,479 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 789 transitions. [2021-03-10 21:58:26,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 789 transitions. [2021-03-10 21:58:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:26,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:26,480 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:26,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-10 21:58:26,481 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1819009686, now seen corresponding path program 24 times [2021-03-10 21:58:26,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:26,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259236822] [2021-03-10 21:58:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:26,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259236822] [2021-03-10 21:58:26,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:26,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:26,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531525885] [2021-03-10 21:58:26,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:26,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:26,556 INFO L87 Difference]: Start difference. First operand 247 states and 789 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:26,764 INFO L93 Difference]: Finished difference Result 460 states and 1340 transitions. [2021-03-10 21:58:26,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:26,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:26,766 INFO L225 Difference]: With dead ends: 460 [2021-03-10 21:58:26,766 INFO L226 Difference]: Without dead ends: 433 [2021-03-10 21:58:26,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-03-10 21:58:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 244. [2021-03-10 21:58:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.2016460905349793) internal successors, (778), 243 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 778 transitions. [2021-03-10 21:58:26,773 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 778 transitions. Word has length 17 [2021-03-10 21:58:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:26,773 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 778 transitions. [2021-03-10 21:58:26,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 778 transitions. [2021-03-10 21:58:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:26,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:26,774 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:26,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-10 21:58:26,775 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash -641213590, now seen corresponding path program 25 times [2021-03-10 21:58:26,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:26,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393020339] [2021-03-10 21:58:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:26,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393020339] [2021-03-10 21:58:26,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:26,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:26,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135498220] [2021-03-10 21:58:26,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:26,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:26,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:26,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:26,875 INFO L87 Difference]: Start difference. First operand 244 states and 778 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:27,139 INFO L93 Difference]: Finished difference Result 497 states and 1449 transitions. [2021-03-10 21:58:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:27,141 INFO L225 Difference]: With dead ends: 497 [2021-03-10 21:58:27,141 INFO L226 Difference]: Without dead ends: 482 [2021-03-10 21:58:27,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-03-10 21:58:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 244. [2021-03-10 21:58:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.2016460905349793) internal successors, (778), 243 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 778 transitions. [2021-03-10 21:58:27,146 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 778 transitions. Word has length 17 [2021-03-10 21:58:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:27,146 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 778 transitions. [2021-03-10 21:58:27,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 778 transitions. [2021-03-10 21:58:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:27,147 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:27,147 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:27,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-10 21:58:27,147 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:27,147 INFO L82 PathProgramCache]: Analyzing trace with hash -74261510, now seen corresponding path program 26 times [2021-03-10 21:58:27,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:27,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393006968] [2021-03-10 21:58:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:27,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393006968] [2021-03-10 21:58:27,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:27,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:27,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960697484] [2021-03-10 21:58:27,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:27,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:27,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:27,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:27,213 INFO L87 Difference]: Start difference. First operand 244 states and 778 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:27,459 INFO L93 Difference]: Finished difference Result 497 states and 1436 transitions. [2021-03-10 21:58:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:27,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:27,461 INFO L225 Difference]: With dead ends: 497 [2021-03-10 21:58:27,461 INFO L226 Difference]: Without dead ends: 476 [2021-03-10 21:58:27,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:27,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-10 21:58:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 245. [2021-03-10 21:58:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.2131147540983607) internal successors, (784), 244 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 784 transitions. [2021-03-10 21:58:27,469 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 784 transitions. Word has length 17 [2021-03-10 21:58:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:27,469 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 784 transitions. [2021-03-10 21:58:27,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 784 transitions. [2021-03-10 21:58:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:27,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:27,470 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:27,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-10 21:58:27,470 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:27,470 INFO L82 PathProgramCache]: Analyzing trace with hash 651128810, now seen corresponding path program 27 times [2021-03-10 21:58:27,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:27,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955382049] [2021-03-10 21:58:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:27,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955382049] [2021-03-10 21:58:27,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:27,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:27,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291110610] [2021-03-10 21:58:27,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:27,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:27,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:27,539 INFO L87 Difference]: Start difference. First operand 245 states and 784 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:27,705 INFO L93 Difference]: Finished difference Result 487 states and 1423 transitions. [2021-03-10 21:58:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:58:27,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:27,707 INFO L225 Difference]: With dead ends: 487 [2021-03-10 21:58:27,707 INFO L226 Difference]: Without dead ends: 449 [2021-03-10 21:58:27,708 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-10 21:58:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 246. [2021-03-10 21:58:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.2244897959183674) internal successors, (790), 245 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 790 transitions. [2021-03-10 21:58:27,714 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 790 transitions. Word has length 17 [2021-03-10 21:58:27,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:27,714 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 790 transitions. [2021-03-10 21:58:27,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 790 transitions. [2021-03-10 21:58:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:27,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:27,715 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:27,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-10 21:58:27,715 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:27,715 INFO L82 PathProgramCache]: Analyzing trace with hash 275931370, now seen corresponding path program 28 times [2021-03-10 21:58:27,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:27,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568465083] [2021-03-10 21:58:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:27,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568465083] [2021-03-10 21:58:27,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:27,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:27,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118820076] [2021-03-10 21:58:27,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:27,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:27,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:27,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:27,802 INFO L87 Difference]: Start difference. First operand 246 states and 790 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:28,071 INFO L93 Difference]: Finished difference Result 473 states and 1396 transitions. [2021-03-10 21:58:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:28,074 INFO L225 Difference]: With dead ends: 473 [2021-03-10 21:58:28,074 INFO L226 Difference]: Without dead ends: 452 [2021-03-10 21:58:28,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:28,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-03-10 21:58:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 250. [2021-03-10 21:58:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.2369477911646585) internal successors, (806), 249 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 806 transitions. [2021-03-10 21:58:28,080 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 806 transitions. Word has length 17 [2021-03-10 21:58:28,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:28,080 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 806 transitions. [2021-03-10 21:58:28,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 806 transitions. [2021-03-10 21:58:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:28,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:28,081 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:28,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-03-10 21:58:28,081 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:28,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash 447035002, now seen corresponding path program 29 times [2021-03-10 21:58:28,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:28,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514319429] [2021-03-10 21:58:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:28,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514319429] [2021-03-10 21:58:28,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:28,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:28,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396875610] [2021-03-10 21:58:28,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:28,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:28,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:28,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:28,169 INFO L87 Difference]: Start difference. First operand 250 states and 806 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:28,391 INFO L93 Difference]: Finished difference Result 511 states and 1473 transitions. [2021-03-10 21:58:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:28,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:28,393 INFO L225 Difference]: With dead ends: 511 [2021-03-10 21:58:28,394 INFO L226 Difference]: Without dead ends: 484 [2021-03-10 21:58:28,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-03-10 21:58:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 252. [2021-03-10 21:58:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.231075697211155) internal successors, (811), 251 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 811 transitions. [2021-03-10 21:58:28,402 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 811 transitions. Word has length 17 [2021-03-10 21:58:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:28,402 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 811 transitions. [2021-03-10 21:58:28,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 811 transitions. [2021-03-10 21:58:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:28,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:28,403 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:28,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-03-10 21:58:28,403 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1316167168, now seen corresponding path program 30 times [2021-03-10 21:58:28,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:28,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246022228] [2021-03-10 21:58:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:28,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246022228] [2021-03-10 21:58:28,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:28,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:28,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419302433] [2021-03-10 21:58:28,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:28,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:28,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:28,490 INFO L87 Difference]: Start difference. First operand 252 states and 811 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:28,705 INFO L93 Difference]: Finished difference Result 482 states and 1421 transitions. [2021-03-10 21:58:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:28,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:28,707 INFO L225 Difference]: With dead ends: 482 [2021-03-10 21:58:28,708 INFO L226 Difference]: Without dead ends: 461 [2021-03-10 21:58:28,708 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-03-10 21:58:28,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 252. [2021-03-10 21:58:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.231075697211155) internal successors, (811), 251 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 811 transitions. [2021-03-10 21:58:28,714 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 811 transitions. Word has length 17 [2021-03-10 21:58:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:28,714 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 811 transitions. [2021-03-10 21:58:28,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 811 transitions. [2021-03-10 21:58:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:28,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:28,714 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:28,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-03-10 21:58:28,715 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:28,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1963810802, now seen corresponding path program 31 times [2021-03-10 21:58:28,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:28,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349333515] [2021-03-10 21:58:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:28,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349333515] [2021-03-10 21:58:28,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:28,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:28,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625691213] [2021-03-10 21:58:28,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:28,781 INFO L87 Difference]: Start difference. First operand 252 states and 811 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:28,956 INFO L93 Difference]: Finished difference Result 478 states and 1430 transitions. [2021-03-10 21:58:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:28,958 INFO L225 Difference]: With dead ends: 478 [2021-03-10 21:58:28,958 INFO L226 Difference]: Without dead ends: 463 [2021-03-10 21:58:28,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-10 21:58:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 258. [2021-03-10 21:58:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.245136186770428) internal successors, (834), 257 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 834 transitions. [2021-03-10 21:58:28,963 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 834 transitions. Word has length 17 [2021-03-10 21:58:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:28,964 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 834 transitions. [2021-03-10 21:58:28,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 834 transitions. [2021-03-10 21:58:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:28,964 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:28,964 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:28,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-03-10 21:58:28,964 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:28,965 INFO L82 PathProgramCache]: Analyzing trace with hash -706818726, now seen corresponding path program 32 times [2021-03-10 21:58:28,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:28,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401218536] [2021-03-10 21:58:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:29,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401218536] [2021-03-10 21:58:29,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:29,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:58:29,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828140020] [2021-03-10 21:58:29,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:58:29,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:29,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:58:29,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:58:29,013 INFO L87 Difference]: Start difference. First operand 258 states and 834 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:29,108 INFO L93 Difference]: Finished difference Result 443 states and 1340 transitions. [2021-03-10 21:58:29,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:58:29,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:29,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:29,110 INFO L225 Difference]: With dead ends: 443 [2021-03-10 21:58:29,110 INFO L226 Difference]: Without dead ends: 420 [2021-03-10 21:58:29,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-03-10 21:58:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 264. [2021-03-10 21:58:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.2813688212927756) internal successors, (863), 263 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 863 transitions. [2021-03-10 21:58:29,118 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 863 transitions. Word has length 17 [2021-03-10 21:58:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:29,118 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 863 transitions. [2021-03-10 21:58:29,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,118 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 863 transitions. [2021-03-10 21:58:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:29,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:29,119 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:29,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-03-10 21:58:29,119 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1915802870, now seen corresponding path program 33 times [2021-03-10 21:58:29,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:29,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235710998] [2021-03-10 21:58:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:29,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235710998] [2021-03-10 21:58:29,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:29,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:58:29,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647892357] [2021-03-10 21:58:29,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:58:29,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:58:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:58:29,169 INFO L87 Difference]: Start difference. First operand 264 states and 863 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:29,238 INFO L93 Difference]: Finished difference Result 458 states and 1379 transitions. [2021-03-10 21:58:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:58:29,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:29,240 INFO L225 Difference]: With dead ends: 458 [2021-03-10 21:58:29,240 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 21:58:29,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 21:58:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 257. [2021-03-10 21:58:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.21875) internal successors, (824), 256 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 824 transitions. [2021-03-10 21:58:29,246 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 824 transitions. Word has length 17 [2021-03-10 21:58:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:29,247 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 824 transitions. [2021-03-10 21:58:29,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 824 transitions. [2021-03-10 21:58:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:29,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:29,247 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:29,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-03-10 21:58:29,248 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:29,248 INFO L82 PathProgramCache]: Analyzing trace with hash 939630764, now seen corresponding path program 34 times [2021-03-10 21:58:29,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:29,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735784815] [2021-03-10 21:58:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:29,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735784815] [2021-03-10 21:58:29,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:29,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:29,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685268137] [2021-03-10 21:58:29,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:29,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:29,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:29,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:29,312 INFO L87 Difference]: Start difference. First operand 257 states and 824 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:29,488 INFO L93 Difference]: Finished difference Result 402 states and 1188 transitions. [2021-03-10 21:58:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:29,490 INFO L225 Difference]: With dead ends: 402 [2021-03-10 21:58:29,490 INFO L226 Difference]: Without dead ends: 375 [2021-03-10 21:58:29,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-03-10 21:58:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 259. [2021-03-10 21:58:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.2131782945736433) internal successors, (829), 258 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 829 transitions. [2021-03-10 21:58:29,497 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 829 transitions. Word has length 17 [2021-03-10 21:58:29,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:29,497 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 829 transitions. [2021-03-10 21:58:29,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 829 transitions. [2021-03-10 21:58:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:29,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:29,498 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:29,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-03-10 21:58:29,498 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:29,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1808762930, now seen corresponding path program 35 times [2021-03-10 21:58:29,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:29,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732033168] [2021-03-10 21:58:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:29,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732033168] [2021-03-10 21:58:29,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:29,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:29,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576314884] [2021-03-10 21:58:29,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:29,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:29,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:29,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:29,560 INFO L87 Difference]: Start difference. First operand 259 states and 829 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:29,744 INFO L93 Difference]: Finished difference Result 402 states and 1194 transitions. [2021-03-10 21:58:29,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:29,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:29,746 INFO L225 Difference]: With dead ends: 402 [2021-03-10 21:58:29,746 INFO L226 Difference]: Without dead ends: 381 [2021-03-10 21:58:29,746 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-03-10 21:58:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 257. [2021-03-10 21:58:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.21875) internal successors, (824), 256 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 824 transitions. [2021-03-10 21:58:29,752 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 824 transitions. Word has length 17 [2021-03-10 21:58:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:29,752 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 824 transitions. [2021-03-10 21:58:29,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 824 transitions. [2021-03-10 21:58:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:58:29,753 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:29,753 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:29,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-03-10 21:58:29,753 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 421173314, now seen corresponding path program 36 times [2021-03-10 21:58:29,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:29,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450736675] [2021-03-10 21:58:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:29,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450736675] [2021-03-10 21:58:29,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:29,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:58:29,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054592701] [2021-03-10 21:58:29,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:58:29,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:29,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:58:29,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:58:29,795 INFO L87 Difference]: Start difference. First operand 257 states and 824 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:29,855 INFO L93 Difference]: Finished difference Result 379 states and 1145 transitions. [2021-03-10 21:58:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:58:29,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:58:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:29,857 INFO L225 Difference]: With dead ends: 379 [2021-03-10 21:58:29,857 INFO L226 Difference]: Without dead ends: 352 [2021-03-10 21:58:29,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:58:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-03-10 21:58:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 257. [2021-03-10 21:58:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.2109375) internal successors, (822), 256 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 822 transitions. [2021-03-10 21:58:29,862 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 822 transitions. Word has length 17 [2021-03-10 21:58:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:29,862 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 822 transitions. [2021-03-10 21:58:29,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 822 transitions. [2021-03-10 21:58:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:29,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:29,863 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:29,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-03-10 21:58:29,863 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:29,863 INFO L82 PathProgramCache]: Analyzing trace with hash -847314392, now seen corresponding path program 1 times [2021-03-10 21:58:29,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:29,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243485107] [2021-03-10 21:58:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:29,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243485107] [2021-03-10 21:58:29,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:29,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:29,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093050567] [2021-03-10 21:58:29,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:29,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:29,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:29,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:29,947 INFO L87 Difference]: Start difference. First operand 257 states and 822 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:30,064 INFO L93 Difference]: Finished difference Result 450 states and 1332 transitions. [2021-03-10 21:58:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:30,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:30,066 INFO L225 Difference]: With dead ends: 450 [2021-03-10 21:58:30,066 INFO L226 Difference]: Without dead ends: 432 [2021-03-10 21:58:30,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-03-10 21:58:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 262. [2021-03-10 21:58:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.1992337164750957) internal successors, (835), 261 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 835 transitions. [2021-03-10 21:58:30,072 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 835 transitions. Word has length 18 [2021-03-10 21:58:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:30,072 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 835 transitions. [2021-03-10 21:58:30,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 835 transitions. [2021-03-10 21:58:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:30,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:30,073 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:30,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-03-10 21:58:30,074 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:30,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash -47426210, now seen corresponding path program 1 times [2021-03-10 21:58:30,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:30,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564825764] [2021-03-10 21:58:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:30,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564825764] [2021-03-10 21:58:30,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:30,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:30,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2770467] [2021-03-10 21:58:30,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:30,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:30,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:30,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:30,123 INFO L87 Difference]: Start difference. First operand 262 states and 835 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:30,242 INFO L93 Difference]: Finished difference Result 501 states and 1470 transitions. [2021-03-10 21:58:30,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:30,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:30,244 INFO L225 Difference]: With dead ends: 501 [2021-03-10 21:58:30,244 INFO L226 Difference]: Without dead ends: 501 [2021-03-10 21:58:30,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-03-10 21:58:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 267. [2021-03-10 21:58:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.206766917293233) internal successors, (853), 266 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 853 transitions. [2021-03-10 21:58:30,252 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 853 transitions. Word has length 18 [2021-03-10 21:58:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:30,252 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 853 transitions. [2021-03-10 21:58:30,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 853 transitions. [2021-03-10 21:58:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:30,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:30,253 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:30,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-03-10 21:58:30,253 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:30,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:30,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1111217320, now seen corresponding path program 2 times [2021-03-10 21:58:30,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:30,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028111584] [2021-03-10 21:58:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:30,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028111584] [2021-03-10 21:58:30,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:30,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:30,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875534400] [2021-03-10 21:58:30,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:30,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:30,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:30,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:30,293 INFO L87 Difference]: Start difference. First operand 267 states and 853 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:30,412 INFO L93 Difference]: Finished difference Result 510 states and 1484 transitions. [2021-03-10 21:58:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:30,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:30,414 INFO L225 Difference]: With dead ends: 510 [2021-03-10 21:58:30,414 INFO L226 Difference]: Without dead ends: 510 [2021-03-10 21:58:30,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-03-10 21:58:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 270. [2021-03-10 21:58:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2118959107806693) internal successors, (864), 269 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 864 transitions. [2021-03-10 21:58:30,420 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 864 transitions. Word has length 18 [2021-03-10 21:58:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:30,421 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 864 transitions. [2021-03-10 21:58:30,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 864 transitions. [2021-03-10 21:58:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:30,421 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:30,421 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:30,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-03-10 21:58:30,422 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:30,422 INFO L82 PathProgramCache]: Analyzing trace with hash -382690402, now seen corresponding path program 3 times [2021-03-10 21:58:30,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:30,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821565195] [2021-03-10 21:58:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:30,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821565195] [2021-03-10 21:58:30,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:30,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:30,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539334646] [2021-03-10 21:58:30,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:30,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:30,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:30,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:30,455 INFO L87 Difference]: Start difference. First operand 270 states and 864 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:30,562 INFO L93 Difference]: Finished difference Result 467 states and 1381 transitions. [2021-03-10 21:58:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:30,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:30,564 INFO L225 Difference]: With dead ends: 467 [2021-03-10 21:58:30,564 INFO L226 Difference]: Without dead ends: 461 [2021-03-10 21:58:30,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-03-10 21:58:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 270. [2021-03-10 21:58:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.200743494423792) internal successors, (861), 269 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 861 transitions. [2021-03-10 21:58:30,570 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 861 transitions. Word has length 18 [2021-03-10 21:58:30,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:30,570 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 861 transitions. [2021-03-10 21:58:30,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 861 transitions. [2021-03-10 21:58:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:30,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:30,571 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:30,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-03-10 21:58:30,571 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:30,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:30,571 INFO L82 PathProgramCache]: Analyzing trace with hash -995566800, now seen corresponding path program 4 times [2021-03-10 21:58:30,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:30,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958122210] [2021-03-10 21:58:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:30,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958122210] [2021-03-10 21:58:30,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:30,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:30,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324988291] [2021-03-10 21:58:30,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:30,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:30,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:30,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:30,607 INFO L87 Difference]: Start difference. First operand 270 states and 861 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:30,719 INFO L93 Difference]: Finished difference Result 491 states and 1441 transitions. [2021-03-10 21:58:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:30,721 INFO L225 Difference]: With dead ends: 491 [2021-03-10 21:58:30,721 INFO L226 Difference]: Without dead ends: 491 [2021-03-10 21:58:30,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:30,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-03-10 21:58:30,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 276. [2021-03-10 21:58:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.210909090909091) internal successors, (883), 275 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 883 transitions. [2021-03-10 21:58:30,728 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 883 transitions. Word has length 18 [2021-03-10 21:58:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:30,728 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 883 transitions. [2021-03-10 21:58:30,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 883 transitions. [2021-03-10 21:58:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:30,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:30,729 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:30,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-03-10 21:58:30,729 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1805492774, now seen corresponding path program 5 times [2021-03-10 21:58:30,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:30,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613398274] [2021-03-10 21:58:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:30,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613398274] [2021-03-10 21:58:30,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:30,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:30,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759914861] [2021-03-10 21:58:30,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:30,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:30,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:30,765 INFO L87 Difference]: Start difference. First operand 276 states and 883 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:30,886 INFO L93 Difference]: Finished difference Result 497 states and 1448 transitions. [2021-03-10 21:58:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:30,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:30,888 INFO L225 Difference]: With dead ends: 497 [2021-03-10 21:58:30,888 INFO L226 Difference]: Without dead ends: 491 [2021-03-10 21:58:30,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-03-10 21:58:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 273. [2021-03-10 21:58:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.2058823529411766) internal successors, (872), 272 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 872 transitions. [2021-03-10 21:58:30,895 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 872 transitions. Word has length 18 [2021-03-10 21:58:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:30,895 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 872 transitions. [2021-03-10 21:58:30,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 872 transitions. [2021-03-10 21:58:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:30,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:30,896 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:30,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-03-10 21:58:30,896 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:30,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1270262972, now seen corresponding path program 6 times [2021-03-10 21:58:30,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:30,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662374316] [2021-03-10 21:58:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:30,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662374316] [2021-03-10 21:58:30,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:30,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:30,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659350613] [2021-03-10 21:58:30,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:30,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:30,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:30,934 INFO L87 Difference]: Start difference. First operand 273 states and 872 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:31,033 INFO L93 Difference]: Finished difference Result 455 states and 1353 transitions. [2021-03-10 21:58:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:31,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:31,035 INFO L225 Difference]: With dead ends: 455 [2021-03-10 21:58:31,035 INFO L226 Difference]: Without dead ends: 443 [2021-03-10 21:58:31,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-03-10 21:58:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 273. [2021-03-10 21:58:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.1948529411764706) internal successors, (869), 272 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 869 transitions. [2021-03-10 21:58:31,042 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 869 transitions. Word has length 18 [2021-03-10 21:58:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:31,044 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 869 transitions. [2021-03-10 21:58:31,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 869 transitions. [2021-03-10 21:58:31,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:31,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:31,045 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:31,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-03-10 21:58:31,045 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:31,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:31,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1406182626, now seen corresponding path program 2 times [2021-03-10 21:58:31,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:31,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942870730] [2021-03-10 21:58:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:31,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942870730] [2021-03-10 21:58:31,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:31,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:31,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020102292] [2021-03-10 21:58:31,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:31,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:31,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:31,102 INFO L87 Difference]: Start difference. First operand 273 states and 869 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:31,262 INFO L93 Difference]: Finished difference Result 579 states and 1669 transitions. [2021-03-10 21:58:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:31,264 INFO L225 Difference]: With dead ends: 579 [2021-03-10 21:58:31,264 INFO L226 Difference]: Without dead ends: 561 [2021-03-10 21:58:31,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-03-10 21:58:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 278. [2021-03-10 21:58:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.184115523465704) internal successors, (882), 277 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 882 transitions. [2021-03-10 21:58:31,271 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 882 transitions. Word has length 18 [2021-03-10 21:58:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:31,271 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 882 transitions. [2021-03-10 21:58:31,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 882 transitions. [2021-03-10 21:58:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:31,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:31,272 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:31,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-03-10 21:58:31,272 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:31,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2088896488, now seen corresponding path program 7 times [2021-03-10 21:58:31,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:31,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112304229] [2021-03-10 21:58:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:31,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112304229] [2021-03-10 21:58:31,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:31,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:58:31,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485304639] [2021-03-10 21:58:31,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:58:31,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:31,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:58:31,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:58:31,368 INFO L87 Difference]: Start difference. First operand 278 states and 882 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:31,510 INFO L93 Difference]: Finished difference Result 626 states and 1811 transitions. [2021-03-10 21:58:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:31,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:31,512 INFO L225 Difference]: With dead ends: 626 [2021-03-10 21:58:31,512 INFO L226 Difference]: Without dead ends: 626 [2021-03-10 21:58:31,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-03-10 21:58:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 283. [2021-03-10 21:58:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.1914893617021276) internal successors, (900), 282 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 900 transitions. [2021-03-10 21:58:31,520 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 900 transitions. Word has length 18 [2021-03-10 21:58:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:31,520 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 900 transitions. [2021-03-10 21:58:31,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 900 transitions. [2021-03-10 21:58:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:31,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:31,521 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:31,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-03-10 21:58:31,521 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:31,521 INFO L82 PathProgramCache]: Analyzing trace with hash -930252958, now seen corresponding path program 8 times [2021-03-10 21:58:31,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:31,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994097329] [2021-03-10 21:58:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:31,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994097329] [2021-03-10 21:58:31,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:31,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:31,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444509017] [2021-03-10 21:58:31,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:31,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:31,561 INFO L87 Difference]: Start difference. First operand 283 states and 900 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:31,693 INFO L93 Difference]: Finished difference Result 654 states and 1869 transitions. [2021-03-10 21:58:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:31,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:31,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:31,695 INFO L225 Difference]: With dead ends: 654 [2021-03-10 21:58:31,695 INFO L226 Difference]: Without dead ends: 654 [2021-03-10 21:58:31,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-03-10 21:58:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 289. [2021-03-10 21:58:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.2118055555555554) internal successors, (925), 288 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 925 transitions. [2021-03-10 21:58:31,703 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 925 transitions. Word has length 18 [2021-03-10 21:58:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:31,703 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 925 transitions. [2021-03-10 21:58:31,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 925 transitions. [2021-03-10 21:58:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:31,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:31,704 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:31,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-03-10 21:58:31,704 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1870806616, now seen corresponding path program 9 times [2021-03-10 21:58:31,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:31,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414010362] [2021-03-10 21:58:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:31,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414010362] [2021-03-10 21:58:31,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:31,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:31,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745298951] [2021-03-10 21:58:31,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:31,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:31,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:31,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:31,746 INFO L87 Difference]: Start difference. First operand 289 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:31,885 INFO L93 Difference]: Finished difference Result 611 states and 1760 transitions. [2021-03-10 21:58:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:31,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:31,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:31,887 INFO L225 Difference]: With dead ends: 611 [2021-03-10 21:58:31,887 INFO L226 Difference]: Without dead ends: 605 [2021-03-10 21:58:31,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-03-10 21:58:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 287. [2021-03-10 21:58:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.195804195804196) internal successors, (914), 286 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 914 transitions. [2021-03-10 21:58:31,894 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 914 transitions. Word has length 18 [2021-03-10 21:58:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:31,894 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 914 transitions. [2021-03-10 21:58:31,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 914 transitions. [2021-03-10 21:58:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:31,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:31,895 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:31,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-03-10 21:58:31,895 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:31,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:31,895 INFO L82 PathProgramCache]: Analyzing trace with hash -973318070, now seen corresponding path program 3 times [2021-03-10 21:58:31,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:31,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807805440] [2021-03-10 21:58:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:31,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807805440] [2021-03-10 21:58:31,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:31,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:31,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413946278] [2021-03-10 21:58:31,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:31,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:31,940 INFO L87 Difference]: Start difference. First operand 287 states and 914 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:32,014 INFO L93 Difference]: Finished difference Result 525 states and 1542 transitions. [2021-03-10 21:58:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:32,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:32,016 INFO L225 Difference]: With dead ends: 525 [2021-03-10 21:58:32,016 INFO L226 Difference]: Without dead ends: 507 [2021-03-10 21:58:32,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-03-10 21:58:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 291. [2021-03-10 21:58:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1862068965517243) internal successors, (924), 290 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 924 transitions. [2021-03-10 21:58:32,024 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 924 transitions. Word has length 18 [2021-03-10 21:58:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:32,024 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 924 transitions. [2021-03-10 21:58:32,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 924 transitions. [2021-03-10 21:58:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:32,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:32,025 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:32,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-03-10 21:58:32,025 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:32,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:32,025 INFO L82 PathProgramCache]: Analyzing trace with hash 491168226, now seen corresponding path program 4 times [2021-03-10 21:58:32,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:32,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646266946] [2021-03-10 21:58:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:32,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646266946] [2021-03-10 21:58:32,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:32,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:32,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827775301] [2021-03-10 21:58:32,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:32,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:32,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:32,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:32,066 INFO L87 Difference]: Start difference. First operand 291 states and 924 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:32,162 INFO L93 Difference]: Finished difference Result 515 states and 1521 transitions. [2021-03-10 21:58:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:32,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:32,164 INFO L225 Difference]: With dead ends: 515 [2021-03-10 21:58:32,164 INFO L226 Difference]: Without dead ends: 508 [2021-03-10 21:58:32,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-03-10 21:58:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 302. [2021-03-10 21:58:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.166112956810631) internal successors, (953), 301 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 953 transitions. [2021-03-10 21:58:32,172 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 953 transitions. Word has length 18 [2021-03-10 21:58:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:32,172 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 953 transitions. [2021-03-10 21:58:32,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 953 transitions. [2021-03-10 21:58:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:32,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:32,173 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:32,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-03-10 21:58:32,173 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash -275677922, now seen corresponding path program 5 times [2021-03-10 21:58:32,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:32,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563078968] [2021-03-10 21:58:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:32,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563078968] [2021-03-10 21:58:32,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:32,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:32,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527595990] [2021-03-10 21:58:32,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:32,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:32,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:32,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:32,216 INFO L87 Difference]: Start difference. First operand 302 states and 953 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:32,299 INFO L93 Difference]: Finished difference Result 484 states and 1464 transitions. [2021-03-10 21:58:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:32,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:32,301 INFO L225 Difference]: With dead ends: 484 [2021-03-10 21:58:32,301 INFO L226 Difference]: Without dead ends: 484 [2021-03-10 21:58:32,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-03-10 21:58:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 295. [2021-03-10 21:58:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.183673469387755) internal successors, (936), 294 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 936 transitions. [2021-03-10 21:58:32,307 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 936 transitions. Word has length 18 [2021-03-10 21:58:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:32,307 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 936 transitions. [2021-03-10 21:58:32,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 936 transitions. [2021-03-10 21:58:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:32,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:32,308 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:32,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-03-10 21:58:32,308 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:32,309 INFO L82 PathProgramCache]: Analyzing trace with hash -270319390, now seen corresponding path program 10 times [2021-03-10 21:58:32,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:32,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662747112] [2021-03-10 21:58:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:32,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662747112] [2021-03-10 21:58:32,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126409387] [2021-03-10 21:58:32,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:32,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:32,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:32,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:32,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-10 21:58:32,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141349633] [2021-03-10 21:58:32,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:58:32,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:32,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:58:32,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:32,635 INFO L87 Difference]: Start difference. First operand 295 states and 936 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:32,877 INFO L93 Difference]: Finished difference Result 628 states and 1829 transitions. [2021-03-10 21:58:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:32,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:32,880 INFO L225 Difference]: With dead ends: 628 [2021-03-10 21:58:32,880 INFO L226 Difference]: Without dead ends: 628 [2021-03-10 21:58:32,880 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:58:32,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-03-10 21:58:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 281. [2021-03-10 21:58:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.182142857142857) internal successors, (891), 280 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 891 transitions. [2021-03-10 21:58:32,892 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 891 transitions. Word has length 18 [2021-03-10 21:58:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:32,892 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 891 transitions. [2021-03-10 21:58:32,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 891 transitions. [2021-03-10 21:58:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:32,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:32,895 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:33,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-10 21:58:33,103 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:33,104 INFO L82 PathProgramCache]: Analyzing trace with hash -594404954, now seen corresponding path program 11 times [2021-03-10 21:58:33,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:33,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244366799] [2021-03-10 21:58:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:33,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244366799] [2021-03-10 21:58:33,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:33,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:33,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28681558] [2021-03-10 21:58:33,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:33,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:33,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:33,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:33,151 INFO L87 Difference]: Start difference. First operand 281 states and 891 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:33,256 INFO L93 Difference]: Finished difference Result 575 states and 1689 transitions. [2021-03-10 21:58:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:33,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:33,258 INFO L225 Difference]: With dead ends: 575 [2021-03-10 21:58:33,258 INFO L226 Difference]: Without dead ends: 575 [2021-03-10 21:58:33,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-03-10 21:58:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 282. [2021-03-10 21:58:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.192170818505338) internal successors, (897), 281 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 897 transitions. [2021-03-10 21:58:33,268 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 897 transitions. Word has length 18 [2021-03-10 21:58:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:33,268 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 897 transitions. [2021-03-10 21:58:33,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 897 transitions. [2021-03-10 21:58:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:33,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:33,269 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:33,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-03-10 21:58:33,269 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1437098190, now seen corresponding path program 12 times [2021-03-10 21:58:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:33,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761745430] [2021-03-10 21:58:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:33,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761745430] [2021-03-10 21:58:33,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:33,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:33,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988199538] [2021-03-10 21:58:33,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:33,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:33,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:33,313 INFO L87 Difference]: Start difference. First operand 282 states and 897 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:33,422 INFO L93 Difference]: Finished difference Result 559 states and 1656 transitions. [2021-03-10 21:58:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:33,424 INFO L225 Difference]: With dead ends: 559 [2021-03-10 21:58:33,424 INFO L226 Difference]: Without dead ends: 559 [2021-03-10 21:58:33,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-03-10 21:58:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 281. [2021-03-10 21:58:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.182142857142857) internal successors, (891), 280 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 891 transitions. [2021-03-10 21:58:33,431 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 891 transitions. Word has length 18 [2021-03-10 21:58:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:33,432 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 891 transitions. [2021-03-10 21:58:33,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 891 transitions. [2021-03-10 21:58:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:33,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:33,432 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:33,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-03-10 21:58:33,433 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:33,433 INFO L82 PathProgramCache]: Analyzing trace with hash -799867102, now seen corresponding path program 6 times [2021-03-10 21:58:33,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:33,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260568136] [2021-03-10 21:58:33,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:33,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260568136] [2021-03-10 21:58:33,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:33,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:33,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134879325] [2021-03-10 21:58:33,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:33,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:33,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:33,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:33,476 INFO L87 Difference]: Start difference. First operand 281 states and 891 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:33,624 INFO L93 Difference]: Finished difference Result 570 states and 1660 transitions. [2021-03-10 21:58:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:33,626 INFO L225 Difference]: With dead ends: 570 [2021-03-10 21:58:33,626 INFO L226 Difference]: Without dead ends: 563 [2021-03-10 21:58:33,627 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-03-10 21:58:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 296. [2021-03-10 21:58:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1966101694915254) internal successors, (943), 295 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 943 transitions. [2021-03-10 21:58:33,634 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 943 transitions. Word has length 18 [2021-03-10 21:58:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:33,634 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 943 transitions. [2021-03-10 21:58:33,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 943 transitions. [2021-03-10 21:58:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:33,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:33,635 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:33,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-03-10 21:58:33,635 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1261497216, now seen corresponding path program 13 times [2021-03-10 21:58:33,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:33,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179857770] [2021-03-10 21:58:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:33,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179857770] [2021-03-10 21:58:33,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:33,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:33,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129734578] [2021-03-10 21:58:33,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:33,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:33,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:33,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:33,682 INFO L87 Difference]: Start difference. First operand 296 states and 943 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:33,825 INFO L93 Difference]: Finished difference Result 602 states and 1769 transitions. [2021-03-10 21:58:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:33,827 INFO L225 Difference]: With dead ends: 602 [2021-03-10 21:58:33,827 INFO L226 Difference]: Without dead ends: 602 [2021-03-10 21:58:33,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-03-10 21:58:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 300. [2021-03-10 21:58:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.220735785953177) internal successors, (963), 299 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 963 transitions. [2021-03-10 21:58:33,834 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 963 transitions. Word has length 18 [2021-03-10 21:58:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:33,834 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 963 transitions. [2021-03-10 21:58:33,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 963 transitions. [2021-03-10 21:58:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:33,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:33,835 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:33,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-03-10 21:58:33,835 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:33,835 INFO L82 PathProgramCache]: Analyzing trace with hash -799362586, now seen corresponding path program 14 times [2021-03-10 21:58:33,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:33,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727624413] [2021-03-10 21:58:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:33,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727624413] [2021-03-10 21:58:33,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:33,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:33,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945415601] [2021-03-10 21:58:33,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:33,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:33,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:33,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:33,876 INFO L87 Difference]: Start difference. First operand 300 states and 963 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:34,015 INFO L93 Difference]: Finished difference Result 595 states and 1733 transitions. [2021-03-10 21:58:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:34,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:34,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:34,017 INFO L225 Difference]: With dead ends: 595 [2021-03-10 21:58:34,017 INFO L226 Difference]: Without dead ends: 589 [2021-03-10 21:58:34,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-03-10 21:58:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 306. [2021-03-10 21:58:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1901639344262294) internal successors, (973), 305 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 973 transitions. [2021-03-10 21:58:34,036 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 973 transitions. Word has length 18 [2021-03-10 21:58:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:34,036 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 973 transitions. [2021-03-10 21:58:34,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 973 transitions. [2021-03-10 21:58:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:34,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:34,037 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:34,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-03-10 21:58:34,037 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:34,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2054661876, now seen corresponding path program 7 times [2021-03-10 21:58:34,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:34,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534984204] [2021-03-10 21:58:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:34,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534984204] [2021-03-10 21:58:34,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:34,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:34,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357986216] [2021-03-10 21:58:34,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:34,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:34,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:34,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:34,085 INFO L87 Difference]: Start difference. First operand 306 states and 973 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:34,223 INFO L93 Difference]: Finished difference Result 589 states and 1725 transitions. [2021-03-10 21:58:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:34,225 INFO L225 Difference]: With dead ends: 589 [2021-03-10 21:58:34,225 INFO L226 Difference]: Without dead ends: 589 [2021-03-10 21:58:34,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:34,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-03-10 21:58:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 303. [2021-03-10 21:58:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1953642384105962) internal successors, (965), 302 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 965 transitions. [2021-03-10 21:58:34,233 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 965 transitions. Word has length 18 [2021-03-10 21:58:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:34,233 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 965 transitions. [2021-03-10 21:58:34,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,233 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 965 transitions. [2021-03-10 21:58:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:34,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:34,234 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:34,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-03-10 21:58:34,234 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1985003846, now seen corresponding path program 8 times [2021-03-10 21:58:34,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:34,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647181666] [2021-03-10 21:58:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:34,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647181666] [2021-03-10 21:58:34,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:34,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:34,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698122351] [2021-03-10 21:58:34,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:34,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:34,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:34,284 INFO L87 Difference]: Start difference. First operand 303 states and 965 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:34,395 INFO L93 Difference]: Finished difference Result 564 states and 1644 transitions. [2021-03-10 21:58:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:34,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:34,397 INFO L225 Difference]: With dead ends: 564 [2021-03-10 21:58:34,397 INFO L226 Difference]: Without dead ends: 557 [2021-03-10 21:58:34,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-03-10 21:58:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 307. [2021-03-10 21:58:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.1993464052287583) internal successors, (979), 306 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 979 transitions. [2021-03-10 21:58:34,404 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 979 transitions. Word has length 18 [2021-03-10 21:58:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:34,404 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 979 transitions. [2021-03-10 21:58:34,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 979 transitions. [2021-03-10 21:58:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:34,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:34,405 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:34,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-03-10 21:58:34,405 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash 382898978, now seen corresponding path program 9 times [2021-03-10 21:58:34,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:34,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321512217] [2021-03-10 21:58:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:34,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321512217] [2021-03-10 21:58:34,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:34,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:34,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000944665] [2021-03-10 21:58:34,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:34,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:34,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:34,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:34,454 INFO L87 Difference]: Start difference. First operand 307 states and 979 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:34,557 INFO L93 Difference]: Finished difference Result 539 states and 1608 transitions. [2021-03-10 21:58:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:34,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:34,559 INFO L225 Difference]: With dead ends: 539 [2021-03-10 21:58:34,559 INFO L226 Difference]: Without dead ends: 539 [2021-03-10 21:58:34,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-03-10 21:58:34,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 305. [2021-03-10 21:58:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.2039473684210527) internal successors, (974), 304 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 974 transitions. [2021-03-10 21:58:34,566 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 974 transitions. Word has length 18 [2021-03-10 21:58:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:34,566 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 974 transitions. [2021-03-10 21:58:34,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 974 transitions. [2021-03-10 21:58:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:34,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:34,567 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:34,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-03-10 21:58:34,567 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:34,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2012897654, now seen corresponding path program 15 times [2021-03-10 21:58:34,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:34,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753284483] [2021-03-10 21:58:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:34,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753284483] [2021-03-10 21:58:34,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:34,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:34,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550304405] [2021-03-10 21:58:34,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:34,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:34,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:34,612 INFO L87 Difference]: Start difference. First operand 305 states and 974 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:34,770 INFO L93 Difference]: Finished difference Result 605 states and 1776 transitions. [2021-03-10 21:58:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:34,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:34,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:34,772 INFO L225 Difference]: With dead ends: 605 [2021-03-10 21:58:34,772 INFO L226 Difference]: Without dead ends: 605 [2021-03-10 21:58:34,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-03-10 21:58:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 296. [2021-03-10 21:58:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.2101694915254235) internal successors, (947), 295 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 947 transitions. [2021-03-10 21:58:34,779 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 947 transitions. Word has length 18 [2021-03-10 21:58:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:34,779 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 947 transitions. [2021-03-10 21:58:34,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 947 transitions. [2021-03-10 21:58:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:34,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:34,780 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:34,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-03-10 21:58:34,780 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:34,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1556679322, now seen corresponding path program 16 times [2021-03-10 21:58:34,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:34,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3313462] [2021-03-10 21:58:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:34,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3313462] [2021-03-10 21:58:34,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:34,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:34,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912673012] [2021-03-10 21:58:34,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:34,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:34,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:34,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:34,834 INFO L87 Difference]: Start difference. First operand 296 states and 947 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:34,933 INFO L93 Difference]: Finished difference Result 581 states and 1724 transitions. [2021-03-10 21:58:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:34,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:34,936 INFO L225 Difference]: With dead ends: 581 [2021-03-10 21:58:34,936 INFO L226 Difference]: Without dead ends: 581 [2021-03-10 21:58:34,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:34,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-03-10 21:58:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 295. [2021-03-10 21:58:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.2006802721088436) internal successors, (941), 294 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 941 transitions. [2021-03-10 21:58:34,942 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 941 transitions. Word has length 18 [2021-03-10 21:58:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:34,943 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 941 transitions. [2021-03-10 21:58:34,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 941 transitions. [2021-03-10 21:58:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:34,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:34,944 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:34,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-03-10 21:58:34,945 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1466682102, now seen corresponding path program 17 times [2021-03-10 21:58:34,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:34,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135413520] [2021-03-10 21:58:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:34,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135413520] [2021-03-10 21:58:34,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:34,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:34,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289233518] [2021-03-10 21:58:34,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:34,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:34,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:34,991 INFO L87 Difference]: Start difference. First operand 295 states and 941 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:35,089 INFO L93 Difference]: Finished difference Result 547 states and 1611 transitions. [2021-03-10 21:58:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:35,091 INFO L225 Difference]: With dead ends: 547 [2021-03-10 21:58:35,091 INFO L226 Difference]: Without dead ends: 541 [2021-03-10 21:58:35,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-03-10 21:58:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 305. [2021-03-10 21:58:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1842105263157894) internal successors, (968), 304 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 968 transitions. [2021-03-10 21:58:35,098 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 968 transitions. Word has length 18 [2021-03-10 21:58:35,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:35,099 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 968 transitions. [2021-03-10 21:58:35,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 968 transitions. [2021-03-10 21:58:35,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:35,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:35,099 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:35,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-03-10 21:58:35,100 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:35,100 INFO L82 PathProgramCache]: Analyzing trace with hash -448741824, now seen corresponding path program 18 times [2021-03-10 21:58:35,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:35,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933771948] [2021-03-10 21:58:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:35,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933771948] [2021-03-10 21:58:35,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:35,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:35,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485685579] [2021-03-10 21:58:35,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:35,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:35,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:35,145 INFO L87 Difference]: Start difference. First operand 305 states and 968 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:35,244 INFO L93 Difference]: Finished difference Result 524 states and 1572 transitions. [2021-03-10 21:58:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:35,247 INFO L225 Difference]: With dead ends: 524 [2021-03-10 21:58:35,247 INFO L226 Difference]: Without dead ends: 524 [2021-03-10 21:58:35,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-03-10 21:58:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 295. [2021-03-10 21:58:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.2006802721088436) internal successors, (941), 294 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 941 transitions. [2021-03-10 21:58:35,253 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 941 transitions. Word has length 18 [2021-03-10 21:58:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:35,254 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 941 transitions. [2021-03-10 21:58:35,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 941 transitions. [2021-03-10 21:58:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:35,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:35,255 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:35,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-03-10 21:58:35,256 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:35,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1962276450, now seen corresponding path program 10 times [2021-03-10 21:58:35,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:35,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770982422] [2021-03-10 21:58:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:35,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770982422] [2021-03-10 21:58:35,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:35,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:35,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159481817] [2021-03-10 21:58:35,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:35,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:35,304 INFO L87 Difference]: Start difference. First operand 295 states and 941 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:35,419 INFO L93 Difference]: Finished difference Result 530 states and 1574 transitions. [2021-03-10 21:58:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:35,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:35,420 INFO L225 Difference]: With dead ends: 530 [2021-03-10 21:58:35,420 INFO L226 Difference]: Without dead ends: 530 [2021-03-10 21:58:35,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-03-10 21:58:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 292. [2021-03-10 21:58:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.185567010309278) internal successors, (927), 291 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 927 transitions. [2021-03-10 21:58:35,427 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 927 transitions. Word has length 18 [2021-03-10 21:58:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:35,427 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 927 transitions. [2021-03-10 21:58:35,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,427 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 927 transitions. [2021-03-10 21:58:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:35,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:35,428 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:35,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-03-10 21:58:35,428 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:35,428 INFO L82 PathProgramCache]: Analyzing trace with hash -708353078, now seen corresponding path program 11 times [2021-03-10 21:58:35,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:35,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758545543] [2021-03-10 21:58:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:35,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758545543] [2021-03-10 21:58:35,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:35,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:35,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115580501] [2021-03-10 21:58:35,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:35,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:35,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:35,473 INFO L87 Difference]: Start difference. First operand 292 states and 927 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:35,590 INFO L93 Difference]: Finished difference Result 500 states and 1507 transitions. [2021-03-10 21:58:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:35,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:35,592 INFO L225 Difference]: With dead ends: 500 [2021-03-10 21:58:35,592 INFO L226 Difference]: Without dead ends: 500 [2021-03-10 21:58:35,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-03-10 21:58:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 285. [2021-03-10 21:58:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.211267605633803) internal successors, (912), 284 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 912 transitions. [2021-03-10 21:58:35,599 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 912 transitions. Word has length 18 [2021-03-10 21:58:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:35,600 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 912 transitions. [2021-03-10 21:58:35,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 912 transitions. [2021-03-10 21:58:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:35,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:35,600 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:35,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-03-10 21:58:35,601 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash 634121620, now seen corresponding path program 12 times [2021-03-10 21:58:35,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:35,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597232707] [2021-03-10 21:58:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:35,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597232707] [2021-03-10 21:58:35,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:35,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:35,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371834130] [2021-03-10 21:58:35,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:35,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:35,635 INFO L87 Difference]: Start difference. First operand 285 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:35,768 INFO L93 Difference]: Finished difference Result 586 states and 1711 transitions. [2021-03-10 21:58:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:35,769 INFO L225 Difference]: With dead ends: 586 [2021-03-10 21:58:35,769 INFO L226 Difference]: Without dead ends: 579 [2021-03-10 21:58:35,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-03-10 21:58:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 304. [2021-03-10 21:58:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.1947194719471947) internal successors, (968), 303 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 968 transitions. [2021-03-10 21:58:35,776 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 968 transitions. Word has length 18 [2021-03-10 21:58:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:35,776 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 968 transitions. [2021-03-10 21:58:35,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 968 transitions. [2021-03-10 21:58:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:35,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:35,777 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:35,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-03-10 21:58:35,777 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:35,778 INFO L82 PathProgramCache]: Analyzing trace with hash -806316698, now seen corresponding path program 13 times [2021-03-10 21:58:35,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:35,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058098944] [2021-03-10 21:58:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:35,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058098944] [2021-03-10 21:58:35,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:35,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:35,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919079744] [2021-03-10 21:58:35,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:35,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:35,816 INFO L87 Difference]: Start difference. First operand 304 states and 968 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:35,957 INFO L93 Difference]: Finished difference Result 588 states and 1724 transitions. [2021-03-10 21:58:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:35,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:35,959 INFO L225 Difference]: With dead ends: 588 [2021-03-10 21:58:35,959 INFO L226 Difference]: Without dead ends: 588 [2021-03-10 21:58:35,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-03-10 21:58:35,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 301. [2021-03-10 21:58:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.2) internal successors, (960), 300 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 960 transitions. [2021-03-10 21:58:35,974 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 960 transitions. Word has length 18 [2021-03-10 21:58:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:35,974 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 960 transitions. [2021-03-10 21:58:35,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 960 transitions. [2021-03-10 21:58:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:35,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:35,975 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:35,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-03-10 21:58:35,975 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash 269394458, now seen corresponding path program 14 times [2021-03-10 21:58:35,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:35,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907351168] [2021-03-10 21:58:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:36,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907351168] [2021-03-10 21:58:36,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:36,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:36,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330072771] [2021-03-10 21:58:36,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:36,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:36,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:36,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:36,011 INFO L87 Difference]: Start difference. First operand 301 states and 960 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:36,135 INFO L93 Difference]: Finished difference Result 625 states and 1838 transitions. [2021-03-10 21:58:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:36,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:36,136 INFO L225 Difference]: With dead ends: 625 [2021-03-10 21:58:36,137 INFO L226 Difference]: Without dead ends: 625 [2021-03-10 21:58:36,137 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:36,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-03-10 21:58:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 298. [2021-03-10 21:58:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.2053872053872055) internal successors, (952), 297 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 952 transitions. [2021-03-10 21:58:36,143 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 952 transitions. Word has length 18 [2021-03-10 21:58:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:36,144 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 952 transitions. [2021-03-10 21:58:36,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 952 transitions. [2021-03-10 21:58:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:36,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:36,144 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:36,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-03-10 21:58:36,144 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:36,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1648489574, now seen corresponding path program 15 times [2021-03-10 21:58:36,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:36,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927631684] [2021-03-10 21:58:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:36,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927631684] [2021-03-10 21:58:36,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:36,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:36,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475948213] [2021-03-10 21:58:36,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:36,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:36,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:36,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:36,184 INFO L87 Difference]: Start difference. First operand 298 states and 952 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:36,327 INFO L93 Difference]: Finished difference Result 610 states and 1746 transitions. [2021-03-10 21:58:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:36,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:36,329 INFO L225 Difference]: With dead ends: 610 [2021-03-10 21:58:36,329 INFO L226 Difference]: Without dead ends: 603 [2021-03-10 21:58:36,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-03-10 21:58:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 298. [2021-03-10 21:58:36,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.1952861952861955) internal successors, (949), 297 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 949 transitions. [2021-03-10 21:58:36,335 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 949 transitions. Word has length 18 [2021-03-10 21:58:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:36,335 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 949 transitions. [2021-03-10 21:58:36,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 949 transitions. [2021-03-10 21:58:36,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:36,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:36,336 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:36,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-03-10 21:58:36,336 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:36,337 INFO L82 PathProgramCache]: Analyzing trace with hash 412874744, now seen corresponding path program 19 times [2021-03-10 21:58:36,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:36,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850248408] [2021-03-10 21:58:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:36,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850248408] [2021-03-10 21:58:36,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:36,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:36,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279728670] [2021-03-10 21:58:36,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:36,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:36,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:36,381 INFO L87 Difference]: Start difference. First operand 298 states and 949 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:36,531 INFO L93 Difference]: Finished difference Result 588 states and 1716 transitions. [2021-03-10 21:58:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:36,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:36,533 INFO L225 Difference]: With dead ends: 588 [2021-03-10 21:58:36,533 INFO L226 Difference]: Without dead ends: 588 [2021-03-10 21:58:36,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-03-10 21:58:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 298. [2021-03-10 21:58:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.1952861952861955) internal successors, (949), 297 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 949 transitions. [2021-03-10 21:58:36,539 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 949 transitions. Word has length 18 [2021-03-10 21:58:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:36,540 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 949 transitions. [2021-03-10 21:58:36,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 949 transitions. [2021-03-10 21:58:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:36,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:36,540 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:36,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-03-10 21:58:36,540 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1647985058, now seen corresponding path program 20 times [2021-03-10 21:58:36,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:36,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712394507] [2021-03-10 21:58:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:36,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712394507] [2021-03-10 21:58:36,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:36,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:36,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057671020] [2021-03-10 21:58:36,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:36,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:36,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:36,581 INFO L87 Difference]: Start difference. First operand 298 states and 949 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:36,741 INFO L93 Difference]: Finished difference Result 587 states and 1702 transitions. [2021-03-10 21:58:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:36,743 INFO L225 Difference]: With dead ends: 587 [2021-03-10 21:58:36,743 INFO L226 Difference]: Without dead ends: 581 [2021-03-10 21:58:36,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-03-10 21:58:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 304. [2021-03-10 21:58:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.165016501650165) internal successors, (959), 303 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 959 transitions. [2021-03-10 21:58:36,750 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 959 transitions. Word has length 18 [2021-03-10 21:58:36,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:36,750 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 959 transitions. [2021-03-10 21:58:36,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 959 transitions. [2021-03-10 21:58:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:36,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:36,750 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:36,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-03-10 21:58:36,751 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1206039404, now seen corresponding path program 16 times [2021-03-10 21:58:36,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:36,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147994372] [2021-03-10 21:58:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:36,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147994372] [2021-03-10 21:58:36,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:36,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:36,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119096684] [2021-03-10 21:58:36,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:36,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:36,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:36,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:36,795 INFO L87 Difference]: Start difference. First operand 304 states and 959 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:36,947 INFO L93 Difference]: Finished difference Result 625 states and 1791 transitions. [2021-03-10 21:58:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:36,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:36,949 INFO L225 Difference]: With dead ends: 625 [2021-03-10 21:58:36,949 INFO L226 Difference]: Without dead ends: 625 [2021-03-10 21:58:36,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-03-10 21:58:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 301. [2021-03-10 21:58:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.17) internal successors, (951), 300 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 951 transitions. [2021-03-10 21:58:36,956 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 951 transitions. Word has length 18 [2021-03-10 21:58:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:36,956 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 951 transitions. [2021-03-10 21:58:36,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 951 transitions. [2021-03-10 21:58:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:36,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:36,957 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:36,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-03-10 21:58:36,957 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:36,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1461340978, now seen corresponding path program 17 times [2021-03-10 21:58:36,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:36,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851777252] [2021-03-10 21:58:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:36,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851777252] [2021-03-10 21:58:36,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:36,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:36,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525023875] [2021-03-10 21:58:36,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:36,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:36,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:36,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:36,997 INFO L87 Difference]: Start difference. First operand 301 states and 951 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:37,097 INFO L93 Difference]: Finished difference Result 576 states and 1669 transitions. [2021-03-10 21:58:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:37,099 INFO L225 Difference]: With dead ends: 576 [2021-03-10 21:58:37,099 INFO L226 Difference]: Without dead ends: 569 [2021-03-10 21:58:37,099 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-03-10 21:58:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 305. [2021-03-10 21:58:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.174342105263158) internal successors, (965), 304 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 965 transitions. [2021-03-10 21:58:37,105 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 965 transitions. Word has length 18 [2021-03-10 21:58:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:37,105 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 965 transitions. [2021-03-10 21:58:37,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 965 transitions. [2021-03-10 21:58:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:37,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:37,106 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:37,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-03-10 21:58:37,106 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:37,107 INFO L82 PathProgramCache]: Analyzing trace with hash -465723494, now seen corresponding path program 18 times [2021-03-10 21:58:37,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:37,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753277687] [2021-03-10 21:58:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:37,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753277687] [2021-03-10 21:58:37,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:37,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:37,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086888406] [2021-03-10 21:58:37,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:37,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:37,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:37,152 INFO L87 Difference]: Start difference. First operand 305 states and 965 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:37,244 INFO L93 Difference]: Finished difference Result 551 states and 1633 transitions. [2021-03-10 21:58:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:37,246 INFO L225 Difference]: With dead ends: 551 [2021-03-10 21:58:37,246 INFO L226 Difference]: Without dead ends: 551 [2021-03-10 21:58:37,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-03-10 21:58:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 303. [2021-03-10 21:58:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1788079470198674) internal successors, (960), 302 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 960 transitions. [2021-03-10 21:58:37,252 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 960 transitions. Word has length 18 [2021-03-10 21:58:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:37,252 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 960 transitions. [2021-03-10 21:58:37,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 960 transitions. [2021-03-10 21:58:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:37,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:37,253 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:37,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-03-10 21:58:37,253 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1164275182, now seen corresponding path program 21 times [2021-03-10 21:58:37,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:37,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416246928] [2021-03-10 21:58:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:37,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416246928] [2021-03-10 21:58:37,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:37,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:37,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572579470] [2021-03-10 21:58:37,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:37,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:37,295 INFO L87 Difference]: Start difference. First operand 303 states and 960 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:37,416 INFO L93 Difference]: Finished difference Result 580 states and 1694 transitions. [2021-03-10 21:58:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:37,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:37,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:37,417 INFO L225 Difference]: With dead ends: 580 [2021-03-10 21:58:37,417 INFO L226 Difference]: Without dead ends: 580 [2021-03-10 21:58:37,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-03-10 21:58:37,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 294. [2021-03-10 21:58:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.1843003412969284) internal successors, (933), 293 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 933 transitions. [2021-03-10 21:58:37,424 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 933 transitions. Word has length 18 [2021-03-10 21:58:37,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:37,424 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 933 transitions. [2021-03-10 21:58:37,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 933 transitions. [2021-03-10 21:58:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:37,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:37,425 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:37,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-03-10 21:58:37,425 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:37,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1889665502, now seen corresponding path program 22 times [2021-03-10 21:58:37,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:37,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685440574] [2021-03-10 21:58:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:37,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685440574] [2021-03-10 21:58:37,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:37,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:37,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689914400] [2021-03-10 21:58:37,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:37,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:37,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:37,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:37,476 INFO L87 Difference]: Start difference. First operand 294 states and 933 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:37,582 INFO L93 Difference]: Finished difference Result 550 states and 1627 transitions. [2021-03-10 21:58:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:37,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:37,584 INFO L225 Difference]: With dead ends: 550 [2021-03-10 21:58:37,584 INFO L226 Difference]: Without dead ends: 550 [2021-03-10 21:58:37,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-03-10 21:58:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 291. [2021-03-10 21:58:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1655172413793102) internal successors, (918), 290 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 918 transitions. [2021-03-10 21:58:37,590 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 918 transitions. Word has length 18 [2021-03-10 21:58:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:37,590 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 918 transitions. [2021-03-10 21:58:37,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 918 transitions. [2021-03-10 21:58:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:37,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:37,591 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:37,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-03-10 21:58:37,591 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash 618059630, now seen corresponding path program 23 times [2021-03-10 21:58:37,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:37,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779522287] [2021-03-10 21:58:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:37,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779522287] [2021-03-10 21:58:37,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:37,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:37,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018017208] [2021-03-10 21:58:37,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:37,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:37,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:37,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:37,633 INFO L87 Difference]: Start difference. First operand 291 states and 918 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:37,761 INFO L93 Difference]: Finished difference Result 579 states and 1673 transitions. [2021-03-10 21:58:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:37,763 INFO L225 Difference]: With dead ends: 579 [2021-03-10 21:58:37,763 INFO L226 Difference]: Without dead ends: 573 [2021-03-10 21:58:37,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-03-10 21:58:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 301. [2021-03-10 21:58:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.15) internal successors, (945), 300 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 945 transitions. [2021-03-10 21:58:37,769 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 945 transitions. Word has length 18 [2021-03-10 21:58:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:37,769 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 945 transitions. [2021-03-10 21:58:37,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 945 transitions. [2021-03-10 21:58:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:37,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:37,770 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:37,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-03-10 21:58:37,770 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1297364296, now seen corresponding path program 24 times [2021-03-10 21:58:37,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:37,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34817496] [2021-03-10 21:58:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:37,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34817496] [2021-03-10 21:58:37,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:37,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:37,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038645074] [2021-03-10 21:58:37,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:37,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:37,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:37,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:37,813 INFO L87 Difference]: Start difference. First operand 301 states and 945 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:37,914 INFO L93 Difference]: Finished difference Result 556 states and 1634 transitions. [2021-03-10 21:58:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:37,916 INFO L225 Difference]: With dead ends: 556 [2021-03-10 21:58:37,916 INFO L226 Difference]: Without dead ends: 556 [2021-03-10 21:58:37,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-03-10 21:58:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 291. [2021-03-10 21:58:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1655172413793102) internal successors, (918), 290 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 918 transitions. [2021-03-10 21:58:37,922 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 918 transitions. Word has length 18 [2021-03-10 21:58:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:37,922 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 918 transitions. [2021-03-10 21:58:37,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 918 transitions. [2021-03-10 21:58:37,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:37,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:37,923 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:37,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-03-10 21:58:37,923 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:37,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1113653978, now seen corresponding path program 19 times [2021-03-10 21:58:37,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:37,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772057143] [2021-03-10 21:58:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:37,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772057143] [2021-03-10 21:58:37,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:37,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:37,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607660270] [2021-03-10 21:58:37,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:37,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:37,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:37,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:37,964 INFO L87 Difference]: Start difference. First operand 291 states and 918 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:38,102 INFO L93 Difference]: Finished difference Result 593 states and 1725 transitions. [2021-03-10 21:58:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:38,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:38,104 INFO L225 Difference]: With dead ends: 593 [2021-03-10 21:58:38,104 INFO L226 Difference]: Without dead ends: 593 [2021-03-10 21:58:38,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-03-10 21:58:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 292. [2021-03-10 21:58:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1752577319587627) internal successors, (924), 291 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 924 transitions. [2021-03-10 21:58:38,108 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 924 transitions. Word has length 18 [2021-03-10 21:58:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:38,108 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 924 transitions. [2021-03-10 21:58:38,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 924 transitions. [2021-03-10 21:58:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:38,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:38,109 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:38,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-03-10 21:58:38,109 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:38,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1556975550, now seen corresponding path program 20 times [2021-03-10 21:58:38,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:38,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199896528] [2021-03-10 21:58:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:38,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199896528] [2021-03-10 21:58:38,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:38,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:38,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904303986] [2021-03-10 21:58:38,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:38,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:38,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:38,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:38,147 INFO L87 Difference]: Start difference. First operand 292 states and 924 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:38,242 INFO L93 Difference]: Finished difference Result 563 states and 1658 transitions. [2021-03-10 21:58:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:38,243 INFO L225 Difference]: With dead ends: 563 [2021-03-10 21:58:38,243 INFO L226 Difference]: Without dead ends: 563 [2021-03-10 21:58:38,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-03-10 21:58:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 290. [2021-03-10 21:58:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.1557093425605536) internal successors, (912), 289 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 912 transitions. [2021-03-10 21:58:38,247 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 912 transitions. Word has length 18 [2021-03-10 21:58:38,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:38,247 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 912 transitions. [2021-03-10 21:58:38,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 912 transitions. [2021-03-10 21:58:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:38,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:38,248 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:38,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-03-10 21:58:38,248 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:38,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1494369000, now seen corresponding path program 25 times [2021-03-10 21:58:38,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:38,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122641076] [2021-03-10 21:58:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:38,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122641076] [2021-03-10 21:58:38,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:38,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:38,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195387780] [2021-03-10 21:58:38,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:38,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:38,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:38,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:38,283 INFO L87 Difference]: Start difference. First operand 290 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:38,369 INFO L93 Difference]: Finished difference Result 517 states and 1512 transitions. [2021-03-10 21:58:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:38,371 INFO L225 Difference]: With dead ends: 517 [2021-03-10 21:58:38,371 INFO L226 Difference]: Without dead ends: 511 [2021-03-10 21:58:38,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-10 21:58:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 296. [2021-03-10 21:58:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.128813559322034) internal successors, (923), 295 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 923 transitions. [2021-03-10 21:58:38,376 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 923 transitions. Word has length 18 [2021-03-10 21:58:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:38,376 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 923 transitions. [2021-03-10 21:58:38,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 923 transitions. [2021-03-10 21:58:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:38,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:38,377 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:38,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-03-10 21:58:38,377 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:38,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:38,377 INFO L82 PathProgramCache]: Analyzing trace with hash 885174370, now seen corresponding path program 26 times [2021-03-10 21:58:38,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:38,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423102856] [2021-03-10 21:58:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:38,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423102856] [2021-03-10 21:58:38,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:38,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:38,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854239764] [2021-03-10 21:58:38,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:38,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:38,419 INFO L87 Difference]: Start difference. First operand 296 states and 923 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:38,494 INFO L93 Difference]: Finished difference Result 488 states and 1462 transitions. [2021-03-10 21:58:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:38,496 INFO L225 Difference]: With dead ends: 488 [2021-03-10 21:58:38,496 INFO L226 Difference]: Without dead ends: 488 [2021-03-10 21:58:38,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-03-10 21:58:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 284. [2021-03-10 21:58:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.148409893992933) internal successors, (891), 283 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 891 transitions. [2021-03-10 21:58:38,506 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 891 transitions. Word has length 18 [2021-03-10 21:58:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:38,506 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 891 transitions. [2021-03-10 21:58:38,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 891 transitions. [2021-03-10 21:58:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:38,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:38,507 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:38,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-03-10 21:58:38,507 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:38,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1700413548, now seen corresponding path program 21 times [2021-03-10 21:58:38,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:38,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106723552] [2021-03-10 21:58:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:38,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106723552] [2021-03-10 21:58:38,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:38,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:38,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927065177] [2021-03-10 21:58:38,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:38,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:38,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:38,541 INFO L87 Difference]: Start difference. First operand 284 states and 891 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:38,656 INFO L93 Difference]: Finished difference Result 604 states and 1756 transitions. [2021-03-10 21:58:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:38,658 INFO L225 Difference]: With dead ends: 604 [2021-03-10 21:58:38,658 INFO L226 Difference]: Without dead ends: 604 [2021-03-10 21:58:38,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-03-10 21:58:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 278. [2021-03-10 21:58:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.1263537906137184) internal successors, (866), 277 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 866 transitions. [2021-03-10 21:58:38,668 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 866 transitions. Word has length 18 [2021-03-10 21:58:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:38,668 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 866 transitions. [2021-03-10 21:58:38,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 866 transitions. [2021-03-10 21:58:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:38,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:38,669 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:38,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-03-10 21:58:38,669 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:38,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1421260378, now seen corresponding path program 22 times [2021-03-10 21:58:38,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:38,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037731433] [2021-03-10 21:58:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:38,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037731433] [2021-03-10 21:58:38,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:38,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:38,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676800941] [2021-03-10 21:58:38,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:38,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:38,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:38,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:38,713 INFO L87 Difference]: Start difference. First operand 278 states and 866 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:38,814 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-03-10 21:58:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:38,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:38,816 INFO L225 Difference]: With dead ends: 576 [2021-03-10 21:58:38,816 INFO L226 Difference]: Without dead ends: 576 [2021-03-10 21:58:38,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-03-10 21:58:38,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 275. [2021-03-10 21:58:38,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.1094890510948905) internal successors, (852), 274 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 852 transitions. [2021-03-10 21:58:38,822 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 852 transitions. Word has length 18 [2021-03-10 21:58:38,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:38,822 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 852 transitions. [2021-03-10 21:58:38,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 852 transitions. [2021-03-10 21:58:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:38,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:38,822 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:38,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-03-10 21:58:38,823 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:38,824 INFO L82 PathProgramCache]: Analyzing trace with hash 203077390, now seen corresponding path program 23 times [2021-03-10 21:58:38,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:38,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656397236] [2021-03-10 21:58:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:38,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656397236] [2021-03-10 21:58:38,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:38,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:38,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497494409] [2021-03-10 21:58:38,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:38,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:38,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:38,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:38,862 INFO L87 Difference]: Start difference. First operand 275 states and 852 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:38,969 INFO L93 Difference]: Finished difference Result 540 states and 1595 transitions. [2021-03-10 21:58:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:38,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:38,971 INFO L225 Difference]: With dead ends: 540 [2021-03-10 21:58:38,971 INFO L226 Difference]: Without dead ends: 540 [2021-03-10 21:58:38,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-03-10 21:58:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 265. [2021-03-10 21:58:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.1136363636363638) internal successors, (822), 264 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 822 transitions. [2021-03-10 21:58:38,976 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 822 transitions. Word has length 18 [2021-03-10 21:58:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:38,976 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 822 transitions. [2021-03-10 21:58:38,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 822 transitions. [2021-03-10 21:58:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:38,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:38,978 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:38,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-03-10 21:58:38,979 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash 920966376, now seen corresponding path program 24 times [2021-03-10 21:58:38,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:38,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719692943] [2021-03-10 21:58:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:39,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719692943] [2021-03-10 21:58:39,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:39,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655131476] [2021-03-10 21:58:39,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:39,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:39,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:39,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:39,048 INFO L87 Difference]: Start difference. First operand 265 states and 822 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:39,152 INFO L93 Difference]: Finished difference Result 471 states and 1344 transitions. [2021-03-10 21:58:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:39,159 INFO L225 Difference]: With dead ends: 471 [2021-03-10 21:58:39,159 INFO L226 Difference]: Without dead ends: 453 [2021-03-10 21:58:39,159 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-03-10 21:58:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 265. [2021-03-10 21:58:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.0946969696969697) internal successors, (817), 264 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 817 transitions. [2021-03-10 21:58:39,166 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 817 transitions. Word has length 18 [2021-03-10 21:58:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:39,166 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 817 transitions. [2021-03-10 21:58:39,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 817 transitions. [2021-03-10 21:58:39,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:39,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:39,167 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:39,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-03-10 21:58:39,167 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:39,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1720854558, now seen corresponding path program 27 times [2021-03-10 21:58:39,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:39,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167219556] [2021-03-10 21:58:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:39,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167219556] [2021-03-10 21:58:39,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787576589] [2021-03-10 21:58:39,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:58:39,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:58:39,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:39,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:39,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:39,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2021-03-10 21:58:39,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450987436] [2021-03-10 21:58:39,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:39,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:39,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:39,355 INFO L87 Difference]: Start difference. First operand 265 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:39,485 INFO L93 Difference]: Finished difference Result 427 states and 1257 transitions. [2021-03-10 21:58:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:39,487 INFO L225 Difference]: With dead ends: 427 [2021-03-10 21:58:39,487 INFO L226 Difference]: Without dead ends: 427 [2021-03-10 21:58:39,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:58:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-03-10 21:58:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 272. [2021-03-10 21:58:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.1180811808118083) internal successors, (845), 271 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 845 transitions. [2021-03-10 21:58:39,492 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 845 transitions. Word has length 18 [2021-03-10 21:58:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:39,492 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 845 transitions. [2021-03-10 21:58:39,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 845 transitions. [2021-03-10 21:58:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:39,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:39,493 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:39,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 21:58:39,712 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1415469208, now seen corresponding path program 28 times [2021-03-10 21:58:39,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:39,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516855647] [2021-03-10 21:58:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:39,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516855647] [2021-03-10 21:58:39,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958929346] [2021-03-10 21:58:39,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:39,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:39,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:39,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:39,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:39,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:39,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-03-10 21:58:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087590335] [2021-03-10 21:58:39,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:39,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:39,882 INFO L87 Difference]: Start difference. First operand 272 states and 845 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:40,030 INFO L93 Difference]: Finished difference Result 468 states and 1355 transitions. [2021-03-10 21:58:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:40,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:40,032 INFO L225 Difference]: With dead ends: 468 [2021-03-10 21:58:40,032 INFO L226 Difference]: Without dead ends: 468 [2021-03-10 21:58:40,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:58:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-03-10 21:58:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 278. [2021-03-10 21:58:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.1407942238267146) internal successors, (870), 277 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 870 transitions. [2021-03-10 21:58:40,038 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 870 transitions. Word has length 18 [2021-03-10 21:58:40,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:40,038 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 870 transitions. [2021-03-10 21:58:40,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 870 transitions. [2021-03-10 21:58:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:40,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:40,039 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:40,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:40,257 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:40,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1385590366, now seen corresponding path program 29 times [2021-03-10 21:58:40,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:40,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098105467] [2021-03-10 21:58:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:40,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098105467] [2021-03-10 21:58:40,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:40,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:40,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641831572] [2021-03-10 21:58:40,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:40,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:40,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:40,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:40,305 INFO L87 Difference]: Start difference. First operand 278 states and 870 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:40,398 INFO L93 Difference]: Finished difference Result 400 states and 1209 transitions. [2021-03-10 21:58:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:58:40,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:40,400 INFO L225 Difference]: With dead ends: 400 [2021-03-10 21:58:40,400 INFO L226 Difference]: Without dead ends: 394 [2021-03-10 21:58:40,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-03-10 21:58:40,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 270. [2021-03-10 21:58:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-03-10 21:58:40,405 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-03-10 21:58:40,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:40,405 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-03-10 21:58:40,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-03-10 21:58:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:40,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:40,405 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:40,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-03-10 21:58:40,406 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:40,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1458534320, now seen corresponding path program 25 times [2021-03-10 21:58:40,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:40,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329215449] [2021-03-10 21:58:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:40,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329215449] [2021-03-10 21:58:40,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:40,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:40,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779984568] [2021-03-10 21:58:40,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:40,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:40,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:40,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:40,441 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:40,557 INFO L93 Difference]: Finished difference Result 527 states and 1494 transitions. [2021-03-10 21:58:40,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:40,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:40,558 INFO L225 Difference]: With dead ends: 527 [2021-03-10 21:58:40,558 INFO L226 Difference]: Without dead ends: 509 [2021-03-10 21:58:40,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-03-10 21:58:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 274. [2021-03-10 21:58:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.1355311355311355) internal successors, (856), 273 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 856 transitions. [2021-03-10 21:58:40,565 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 856 transitions. Word has length 18 [2021-03-10 21:58:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:40,565 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 856 transitions. [2021-03-10 21:58:40,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 856 transitions. [2021-03-10 21:58:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:40,565 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:40,565 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:40,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-03-10 21:58:40,565 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:40,566 INFO L82 PathProgramCache]: Analyzing trace with hash 5951976, now seen corresponding path program 26 times [2021-03-10 21:58:40,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:40,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122057291] [2021-03-10 21:58:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:40,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122057291] [2021-03-10 21:58:40,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:40,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:40,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875523451] [2021-03-10 21:58:40,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:40,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:40,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:40,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:40,603 INFO L87 Difference]: Start difference. First operand 274 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:40,753 INFO L93 Difference]: Finished difference Result 517 states and 1473 transitions. [2021-03-10 21:58:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:40,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:40,754 INFO L225 Difference]: With dead ends: 517 [2021-03-10 21:58:40,755 INFO L226 Difference]: Without dead ends: 510 [2021-03-10 21:58:40,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-03-10 21:58:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 285. [2021-03-10 21:58:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.1161971830985915) internal successors, (885), 284 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 885 transitions. [2021-03-10 21:58:40,760 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 885 transitions. Word has length 18 [2021-03-10 21:58:40,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:40,761 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 885 transitions. [2021-03-10 21:58:40,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,761 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 885 transitions. [2021-03-10 21:58:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:40,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:40,761 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:40,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-03-10 21:58:40,762 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash -760894172, now seen corresponding path program 27 times [2021-03-10 21:58:40,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:40,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422807354] [2021-03-10 21:58:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:40,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422807354] [2021-03-10 21:58:40,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:40,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:40,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351739259] [2021-03-10 21:58:40,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:40,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:40,808 INFO L87 Difference]: Start difference. First operand 285 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:40,929 INFO L93 Difference]: Finished difference Result 486 states and 1416 transitions. [2021-03-10 21:58:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:40,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:40,930 INFO L225 Difference]: With dead ends: 486 [2021-03-10 21:58:40,930 INFO L226 Difference]: Without dead ends: 486 [2021-03-10 21:58:40,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:40,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-10 21:58:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 270. [2021-03-10 21:58:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-03-10 21:58:40,936 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-03-10 21:58:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:40,936 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-03-10 21:58:40,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-03-10 21:58:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:40,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:40,937 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:40,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-03-10 21:58:40,937 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash -755535640, now seen corresponding path program 30 times [2021-03-10 21:58:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:40,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176569324] [2021-03-10 21:58:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:41,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176569324] [2021-03-10 21:58:41,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801182219] [2021-03-10 21:58:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:41,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:58:41,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:41,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:41,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:41,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-10 21:58:41,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138296192] [2021-03-10 21:58:41,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:58:41,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:58:41,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:41,125 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:41,388 INFO L93 Difference]: Finished difference Result 822 states and 2325 transitions. [2021-03-10 21:58:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:58:41,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:41,390 INFO L225 Difference]: With dead ends: 822 [2021-03-10 21:58:41,391 INFO L226 Difference]: Without dead ends: 822 [2021-03-10 21:58:41,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-03-10 21:58:41,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 276. [2021-03-10 21:58:41,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1636363636363636) internal successors, (870), 275 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 870 transitions. [2021-03-10 21:58:41,398 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 870 transitions. Word has length 18 [2021-03-10 21:58:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:41,398 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 870 transitions. [2021-03-10 21:58:41,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 870 transitions. [2021-03-10 21:58:41,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:41,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:41,399 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:41,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:41,608 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash 877515752, now seen corresponding path program 31 times [2021-03-10 21:58:41,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:41,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086752441] [2021-03-10 21:58:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:41,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086752441] [2021-03-10 21:58:41,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279902457] [2021-03-10 21:58:41,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:41,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:41,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:41,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-03-10 21:58:41,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196187560] [2021-03-10 21:58:41,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:41,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:41,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:41,764 INFO L87 Difference]: Start difference. First operand 276 states and 870 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:41,882 INFO L93 Difference]: Finished difference Result 512 states and 1502 transitions. [2021-03-10 21:58:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:41,883 INFO L225 Difference]: With dead ends: 512 [2021-03-10 21:58:41,883 INFO L226 Difference]: Without dead ends: 512 [2021-03-10 21:58:41,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:58:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-03-10 21:58:41,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 279. [2021-03-10 21:58:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.183453237410072) internal successors, (885), 278 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 885 transitions. [2021-03-10 21:58:41,889 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 885 transitions. Word has length 18 [2021-03-10 21:58:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:41,889 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 885 transitions. [2021-03-10 21:58:41,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 885 transitions. [2021-03-10 21:58:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:41,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:41,890 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:42,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-10 21:58:42,103 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:42,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1079621204, now seen corresponding path program 32 times [2021-03-10 21:58:42,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:42,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419655294] [2021-03-10 21:58:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:42,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419655294] [2021-03-10 21:58:42,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822627764] [2021-03-10 21:58:42,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:58:42,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:42,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:42,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:42,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:42,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:42,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-03-10 21:58:42,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352282157] [2021-03-10 21:58:42,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:42,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:42,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:42,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:42,255 INFO L87 Difference]: Start difference. First operand 279 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:42,363 INFO L93 Difference]: Finished difference Result 479 states and 1425 transitions. [2021-03-10 21:58:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:42,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:42,364 INFO L225 Difference]: With dead ends: 479 [2021-03-10 21:58:42,364 INFO L226 Difference]: Without dead ends: 479 [2021-03-10 21:58:42,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:58:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-03-10 21:58:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 270. [2021-03-10 21:58:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-03-10 21:58:42,371 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-03-10 21:58:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:42,371 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-03-10 21:58:42,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-03-10 21:58:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:42,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:42,372 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:42,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:42,575 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:42,576 INFO L82 PathProgramCache]: Analyzing trace with hash 209328886, now seen corresponding path program 33 times [2021-03-10 21:58:42,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:42,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014687237] [2021-03-10 21:58:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:42,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014687237] [2021-03-10 21:58:42,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413844347] [2021-03-10 21:58:42,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:58:42,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:58:42,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:42,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:42,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:42,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-03-10 21:58:42,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697092631] [2021-03-10 21:58:42,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:42,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:42,744 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:42,887 INFO L93 Difference]: Finished difference Result 554 states and 1604 transitions. [2021-03-10 21:58:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:42,890 INFO L225 Difference]: With dead ends: 554 [2021-03-10 21:58:42,890 INFO L226 Difference]: Without dead ends: 554 [2021-03-10 21:58:42,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:58:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-03-10 21:58:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 274. [2021-03-10 21:58:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.161172161172161) internal successors, (863), 273 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 863 transitions. [2021-03-10 21:58:42,896 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 863 transitions. Word has length 18 [2021-03-10 21:58:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:42,896 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 863 transitions. [2021-03-10 21:58:42,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 863 transitions. [2021-03-10 21:58:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:42,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:42,896 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:43,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 21:58:43,111 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:43,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1284578836, now seen corresponding path program 34 times [2021-03-10 21:58:43,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:43,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469243194] [2021-03-10 21:58:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:43,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469243194] [2021-03-10 21:58:43,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:43,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:43,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954070652] [2021-03-10 21:58:43,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:43,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:43,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:43,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:43,150 INFO L87 Difference]: Start difference. First operand 274 states and 863 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:43,245 INFO L93 Difference]: Finished difference Result 540 states and 1553 transitions. [2021-03-10 21:58:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:43,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:43,246 INFO L225 Difference]: With dead ends: 540 [2021-03-10 21:58:43,246 INFO L226 Difference]: Without dead ends: 534 [2021-03-10 21:58:43,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:43,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-03-10 21:58:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 280. [2021-03-10 21:58:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.150537634408602) internal successors, (879), 279 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 879 transitions. [2021-03-10 21:58:43,252 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 879 transitions. Word has length 18 [2021-03-10 21:58:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:43,252 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 879 transitions. [2021-03-10 21:58:43,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 879 transitions. [2021-03-10 21:58:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:43,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:43,253 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:43,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-03-10 21:58:43,253 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1824747200, now seen corresponding path program 28 times [2021-03-10 21:58:43,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:43,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228996844] [2021-03-10 21:58:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:43,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228996844] [2021-03-10 21:58:43,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:43,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:43,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880214010] [2021-03-10 21:58:43,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:43,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:43,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:43,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:43,303 INFO L87 Difference]: Start difference. First operand 280 states and 879 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:43,440 INFO L93 Difference]: Finished difference Result 543 states and 1546 transitions. [2021-03-10 21:58:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:43,441 INFO L225 Difference]: With dead ends: 543 [2021-03-10 21:58:43,441 INFO L226 Difference]: Without dead ends: 536 [2021-03-10 21:58:43,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:43,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-03-10 21:58:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 291. [2021-03-10 21:58:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1310344827586207) internal successors, (908), 290 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 908 transitions. [2021-03-10 21:58:43,446 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 908 transitions. Word has length 18 [2021-03-10 21:58:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:43,447 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 908 transitions. [2021-03-10 21:58:43,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,447 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 908 transitions. [2021-03-10 21:58:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:43,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:43,447 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:43,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-03-10 21:58:43,447 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:43,448 INFO L82 PathProgramCache]: Analyzing trace with hash -102317272, now seen corresponding path program 29 times [2021-03-10 21:58:43,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:43,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649081203] [2021-03-10 21:58:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:43,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649081203] [2021-03-10 21:58:43,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:43,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:43,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258259694] [2021-03-10 21:58:43,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:43,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:43,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:43,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:43,488 INFO L87 Difference]: Start difference. First operand 291 states and 908 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:43,623 INFO L93 Difference]: Finished difference Result 542 states and 1551 transitions. [2021-03-10 21:58:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:43,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:43,624 INFO L225 Difference]: With dead ends: 542 [2021-03-10 21:58:43,624 INFO L226 Difference]: Without dead ends: 542 [2021-03-10 21:58:43,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-03-10 21:58:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 289. [2021-03-10 21:58:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1354166666666665) internal successors, (903), 288 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-03-10 21:58:43,633 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-03-10 21:58:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:43,633 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-03-10 21:58:43,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-03-10 21:58:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:43,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:43,636 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:43,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-03-10 21:58:43,636 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash 960729324, now seen corresponding path program 35 times [2021-03-10 21:58:43,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:43,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304892600] [2021-03-10 21:58:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:43,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304892600] [2021-03-10 21:58:43,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050273428] [2021-03-10 21:58:43,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:43,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:43,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:43,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:43,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:43,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:43,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:58:43,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534697034] [2021-03-10 21:58:43,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:58:43,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:58:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:43,808 INFO L87 Difference]: Start difference. First operand 289 states and 903 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:44,082 INFO L93 Difference]: Finished difference Result 752 states and 2121 transitions. [2021-03-10 21:58:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:58:44,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:44,084 INFO L225 Difference]: With dead ends: 752 [2021-03-10 21:58:44,084 INFO L226 Difference]: Without dead ends: 752 [2021-03-10 21:58:44,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:58:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-03-10 21:58:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 292. [2021-03-10 21:58:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.154639175257732) internal successors, (918), 291 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 918 transitions. [2021-03-10 21:58:44,091 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 918 transitions. Word has length 18 [2021-03-10 21:58:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:44,091 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 918 transitions. [2021-03-10 21:58:44,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 918 transitions. [2021-03-10 21:58:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:44,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:44,092 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:44,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:44,309 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2041895572, now seen corresponding path program 36 times [2021-03-10 21:58:44,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:44,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650948348] [2021-03-10 21:58:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:44,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650948348] [2021-03-10 21:58:44,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780133561] [2021-03-10 21:58:44,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:44,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:58:44,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:44,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:44,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:44,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:44,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-03-10 21:58:44,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858010087] [2021-03-10 21:58:44,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:44,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:44,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:44,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:44,475 INFO L87 Difference]: Start difference. First operand 292 states and 918 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:44,597 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-03-10 21:58:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:44,598 INFO L225 Difference]: With dead ends: 546 [2021-03-10 21:58:44,599 INFO L226 Difference]: Without dead ends: 546 [2021-03-10 21:58:44,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:58:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-03-10 21:58:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 289. [2021-03-10 21:58:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1354166666666665) internal successors, (903), 288 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-03-10 21:58:44,604 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-03-10 21:58:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:44,604 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-03-10 21:58:44,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-03-10 21:58:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:44,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:44,605 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:44,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 21:58:44,806 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:44,807 INFO L82 PathProgramCache]: Analyzing trace with hash 981465852, now seen corresponding path program 37 times [2021-03-10 21:58:44,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:44,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369694518] [2021-03-10 21:58:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:44,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369694518] [2021-03-10 21:58:44,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:44,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:44,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432632083] [2021-03-10 21:58:44,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:44,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:44,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:44,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:44,846 INFO L87 Difference]: Start difference. First operand 289 states and 903 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:44,939 INFO L93 Difference]: Finished difference Result 506 states and 1473 transitions. [2021-03-10 21:58:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:44,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:44,941 INFO L225 Difference]: With dead ends: 506 [2021-03-10 21:58:44,941 INFO L226 Difference]: Without dead ends: 500 [2021-03-10 21:58:44,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-03-10 21:58:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 293. [2021-03-10 21:58:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.1404109589041096) internal successors, (917), 292 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 917 transitions. [2021-03-10 21:58:44,948 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 917 transitions. Word has length 18 [2021-03-10 21:58:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:44,948 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 917 transitions. [2021-03-10 21:58:44,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 917 transitions. [2021-03-10 21:58:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:44,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:44,949 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:44,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-03-10 21:58:44,949 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash -933958074, now seen corresponding path program 38 times [2021-03-10 21:58:44,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:44,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290694004] [2021-03-10 21:58:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:44,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290694004] [2021-03-10 21:58:44,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:44,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:44,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044905167] [2021-03-10 21:58:44,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:44,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:44,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:44,997 INFO L87 Difference]: Start difference. First operand 293 states and 917 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:45,112 INFO L93 Difference]: Finished difference Result 524 states and 1524 transitions. [2021-03-10 21:58:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:45,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:45,113 INFO L225 Difference]: With dead ends: 524 [2021-03-10 21:58:45,114 INFO L226 Difference]: Without dead ends: 524 [2021-03-10 21:58:45,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:45,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-03-10 21:58:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 291. [2021-03-10 21:58:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1448275862068966) internal successors, (912), 290 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 912 transitions. [2021-03-10 21:58:45,119 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 912 transitions. Word has length 18 [2021-03-10 21:58:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:45,119 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 912 transitions. [2021-03-10 21:58:45,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 912 transitions. [2021-03-10 21:58:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:45,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:45,122 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:45,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-03-10 21:58:45,122 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:45,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1193569328, now seen corresponding path program 30 times [2021-03-10 21:58:45,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:45,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82352783] [2021-03-10 21:58:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:45,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82352783] [2021-03-10 21:58:45,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:45,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:45,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864516101] [2021-03-10 21:58:45,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:45,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:45,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:45,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:45,169 INFO L87 Difference]: Start difference. First operand 291 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:45,272 INFO L93 Difference]: Finished difference Result 518 states and 1506 transitions. [2021-03-10 21:58:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:45,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:45,274 INFO L225 Difference]: With dead ends: 518 [2021-03-10 21:58:45,274 INFO L226 Difference]: Without dead ends: 518 [2021-03-10 21:58:45,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-03-10 21:58:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 276. [2021-03-10 21:58:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-03-10 21:58:45,279 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-03-10 21:58:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:45,280 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-03-10 21:58:45,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-03-10 21:58:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:45,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:45,280 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:45,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-03-10 21:58:45,280 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1775654886, now seen corresponding path program 31 times [2021-03-10 21:58:45,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:45,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342622298] [2021-03-10 21:58:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:45,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342622298] [2021-03-10 21:58:45,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:45,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:45,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424829829] [2021-03-10 21:58:45,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:45,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:45,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:45,318 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:45,410 INFO L93 Difference]: Finished difference Result 413 states and 1194 transitions. [2021-03-10 21:58:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:45,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:45,411 INFO L225 Difference]: With dead ends: 413 [2021-03-10 21:58:45,411 INFO L226 Difference]: Without dead ends: 395 [2021-03-10 21:58:45,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-03-10 21:58:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 280. [2021-03-10 21:58:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.10752688172043) internal successors, (867), 279 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-03-10 21:58:45,418 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-03-10 21:58:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:45,418 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-03-10 21:58:45,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-03-10 21:58:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:45,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:45,419 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:45,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-03-10 21:58:45,419 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:45,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1054826114, now seen corresponding path program 32 times [2021-03-10 21:58:45,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:45,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736965408] [2021-03-10 21:58:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:45,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736965408] [2021-03-10 21:58:45,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:45,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:45,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914230315] [2021-03-10 21:58:45,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:45,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:45,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:45,452 INFO L87 Difference]: Start difference. First operand 280 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:45,571 INFO L93 Difference]: Finished difference Result 434 states and 1236 transitions. [2021-03-10 21:58:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:45,572 INFO L225 Difference]: With dead ends: 434 [2021-03-10 21:58:45,572 INFO L226 Difference]: Without dead ends: 427 [2021-03-10 21:58:45,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-03-10 21:58:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 291. [2021-03-10 21:58:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.089655172413793) internal successors, (896), 290 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 896 transitions. [2021-03-10 21:58:45,578 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 896 transitions. Word has length 18 [2021-03-10 21:58:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:45,578 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 896 transitions. [2021-03-10 21:58:45,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 896 transitions. [2021-03-10 21:58:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:45,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:45,578 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:45,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-03-10 21:58:45,579 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:45,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:45,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1821672262, now seen corresponding path program 33 times [2021-03-10 21:58:45,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:45,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447302946] [2021-03-10 21:58:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:45,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447302946] [2021-03-10 21:58:45,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:45,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:45,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033263695] [2021-03-10 21:58:45,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:45,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:45,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:45,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:45,614 INFO L87 Difference]: Start difference. First operand 291 states and 896 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:45,725 INFO L93 Difference]: Finished difference Result 403 states and 1179 transitions. [2021-03-10 21:58:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:45,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:45,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:45,726 INFO L225 Difference]: With dead ends: 403 [2021-03-10 21:58:45,726 INFO L226 Difference]: Without dead ends: 403 [2021-03-10 21:58:45,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-03-10 21:58:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 276. [2021-03-10 21:58:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-03-10 21:58:45,731 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-03-10 21:58:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:45,731 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-03-10 21:58:45,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-03-10 21:58:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:45,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:45,731 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:45,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-03-10 21:58:45,731 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:45,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1488855460, now seen corresponding path program 34 times [2021-03-10 21:58:45,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:45,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205434490] [2021-03-10 21:58:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:45,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205434490] [2021-03-10 21:58:45,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:45,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:45,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096516072] [2021-03-10 21:58:45,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:45,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:45,763 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:45,873 INFO L93 Difference]: Finished difference Result 446 states and 1266 transitions. [2021-03-10 21:58:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:45,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:45,874 INFO L225 Difference]: With dead ends: 446 [2021-03-10 21:58:45,874 INFO L226 Difference]: Without dead ends: 439 [2021-03-10 21:58:45,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-03-10 21:58:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 291. [2021-03-10 21:58:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.0965517241379312) internal successors, (898), 290 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 898 transitions. [2021-03-10 21:58:45,879 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 898 transitions. Word has length 18 [2021-03-10 21:58:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:45,879 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 898 transitions. [2021-03-10 21:58:45,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 898 transitions. [2021-03-10 21:58:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:45,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:45,880 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:45,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-03-10 21:58:45,880 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:45,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2039265688, now seen corresponding path program 35 times [2021-03-10 21:58:45,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:45,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557722020] [2021-03-10 21:58:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:45,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557722020] [2021-03-10 21:58:45,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:45,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:45,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576518855] [2021-03-10 21:58:45,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:45,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:45,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:45,914 INFO L87 Difference]: Start difference. First operand 291 states and 898 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:46,034 INFO L93 Difference]: Finished difference Result 445 states and 1271 transitions. [2021-03-10 21:58:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:46,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:46,035 INFO L225 Difference]: With dead ends: 445 [2021-03-10 21:58:46,036 INFO L226 Difference]: Without dead ends: 445 [2021-03-10 21:58:46,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-03-10 21:58:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 289. [2021-03-10 21:58:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1006944444444446) internal successors, (893), 288 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 893 transitions. [2021-03-10 21:58:46,041 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 893 transitions. Word has length 18 [2021-03-10 21:58:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:46,041 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 893 transitions. [2021-03-10 21:58:46,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 893 transitions. [2021-03-10 21:58:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:46,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:46,042 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:46,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-03-10 21:58:46,042 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1080210964, now seen corresponding path program 36 times [2021-03-10 21:58:46,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:46,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266011961] [2021-03-10 21:58:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:46,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266011961] [2021-03-10 21:58:46,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:46,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:46,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986397200] [2021-03-10 21:58:46,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:46,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:46,072 INFO L87 Difference]: Start difference. First operand 289 states and 893 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:46,173 INFO L93 Difference]: Finished difference Result 419 states and 1219 transitions. [2021-03-10 21:58:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:46,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:46,175 INFO L225 Difference]: With dead ends: 419 [2021-03-10 21:58:46,175 INFO L226 Difference]: Without dead ends: 419 [2021-03-10 21:58:46,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-03-10 21:58:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 284. [2021-03-10 21:58:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0989399293286217) internal successors, (877), 283 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 877 transitions. [2021-03-10 21:58:46,180 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 877 transitions. Word has length 18 [2021-03-10 21:58:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:46,180 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 877 transitions. [2021-03-10 21:58:46,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 877 transitions. [2021-03-10 21:58:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:46,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:46,181 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:46,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-03-10 21:58:46,181 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2028469348, now seen corresponding path program 39 times [2021-03-10 21:58:46,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:46,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261161361] [2021-03-10 21:58:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:46,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261161361] [2021-03-10 21:58:46,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696363211] [2021-03-10 21:58:46,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:58:46,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:58:46,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:46,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:46,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:46,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-10 21:58:46,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487013228] [2021-03-10 21:58:46,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:58:46,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:46,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:58:46,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:46,314 INFO L87 Difference]: Start difference. First operand 284 states and 877 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:46,433 INFO L93 Difference]: Finished difference Result 475 states and 1391 transitions. [2021-03-10 21:58:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:46,434 INFO L225 Difference]: With dead ends: 475 [2021-03-10 21:58:46,435 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 21:58:46,435 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:58:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 21:58:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 280. [2021-03-10 21:58:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.078853046594982) internal successors, (859), 279 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-03-10 21:58:46,439 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 18 [2021-03-10 21:58:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:46,440 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-03-10 21:58:46,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-03-10 21:58:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:46,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:46,440 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:46,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:46,647 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash -395417956, now seen corresponding path program 40 times [2021-03-10 21:58:46,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:46,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210352955] [2021-03-10 21:58:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:46,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210352955] [2021-03-10 21:58:46,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269004914] [2021-03-10 21:58:46,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:46,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:46,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:46,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:46,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:46,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:46,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:58:46,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708708919] [2021-03-10 21:58:46,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:58:46,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:46,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:58:46,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:58:46,787 INFO L87 Difference]: Start difference. First operand 280 states and 859 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:46,908 INFO L93 Difference]: Finished difference Result 479 states and 1383 transitions. [2021-03-10 21:58:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:46,908 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:46,909 INFO L225 Difference]: With dead ends: 479 [2021-03-10 21:58:46,909 INFO L226 Difference]: Without dead ends: 479 [2021-03-10 21:58:46,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-03-10 21:58:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 279. [2021-03-10 21:58:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0719424460431655) internal successors, (854), 278 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 854 transitions. [2021-03-10 21:58:46,913 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 854 transitions. Word has length 18 [2021-03-10 21:58:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:46,913 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 854 transitions. [2021-03-10 21:58:46,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 854 transitions. [2021-03-10 21:58:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:46,913 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:46,913 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:47,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:47,128 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:47,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1942412384, now seen corresponding path program 41 times [2021-03-10 21:58:47,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:47,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320321011] [2021-03-10 21:58:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:47,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320321011] [2021-03-10 21:58:47,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421365914] [2021-03-10 21:58:47,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:47,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:47,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:47,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:58:47,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693894758] [2021-03-10 21:58:47,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:58:47,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:47,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:58:47,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:58:47,246 INFO L87 Difference]: Start difference. First operand 279 states and 854 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:47,353 INFO L93 Difference]: Finished difference Result 436 states and 1286 transitions. [2021-03-10 21:58:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:47,354 INFO L225 Difference]: With dead ends: 436 [2021-03-10 21:58:47,354 INFO L226 Difference]: Without dead ends: 436 [2021-03-10 21:58:47,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-03-10 21:58:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 262. [2021-03-10 21:58:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0383141762452106) internal successors, (793), 261 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 793 transitions. [2021-03-10 21:58:47,359 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 793 transitions. Word has length 18 [2021-03-10 21:58:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:47,359 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 793 transitions. [2021-03-10 21:58:47,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 793 transitions. [2021-03-10 21:58:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:47,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:47,360 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:47,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:47,560 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:47,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:47,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1829110872, now seen corresponding path program 42 times [2021-03-10 21:58:47,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:47,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19824017] [2021-03-10 21:58:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:47,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19824017] [2021-03-10 21:58:47,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402963572] [2021-03-10 21:58:47,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:47,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:58:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:47,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:47,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:47,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-03-10 21:58:47,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353790609] [2021-03-10 21:58:47,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:47,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:47,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:47,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:47,675 INFO L87 Difference]: Start difference. First operand 262 states and 793 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:47,772 INFO L93 Difference]: Finished difference Result 450 states and 1301 transitions. [2021-03-10 21:58:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:47,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:47,773 INFO L225 Difference]: With dead ends: 450 [2021-03-10 21:58:47,773 INFO L226 Difference]: Without dead ends: 450 [2021-03-10 21:58:47,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:58:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-03-10 21:58:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 268. [2021-03-10 21:58:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0711610486891385) internal successors, (820), 267 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 820 transitions. [2021-03-10 21:58:47,778 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 820 transitions. Word has length 18 [2021-03-10 21:58:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:47,779 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 820 transitions. [2021-03-10 21:58:47,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 820 transitions. [2021-03-10 21:58:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:47,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:47,779 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:47,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 21:58:47,992 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 508719468, now seen corresponding path program 43 times [2021-03-10 21:58:47,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:47,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955603665] [2021-03-10 21:58:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:48,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955603665] [2021-03-10 21:58:48,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053241775] [2021-03-10 21:58:48,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:58:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:48,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:48,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:48,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:48,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-03-10 21:58:48,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791703260] [2021-03-10 21:58:48,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:48,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:48,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:48,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:48,131 INFO L87 Difference]: Start difference. First operand 268 states and 820 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:48,233 INFO L93 Difference]: Finished difference Result 456 states and 1316 transitions. [2021-03-10 21:58:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:48,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:48,235 INFO L225 Difference]: With dead ends: 456 [2021-03-10 21:58:48,235 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 21:58:48,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:58:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 21:58:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 265. [2021-03-10 21:58:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.0492424242424243) internal successors, (805), 264 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 805 transitions. [2021-03-10 21:58:48,240 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 805 transitions. Word has length 18 [2021-03-10 21:58:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:48,240 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 805 transitions. [2021-03-10 21:58:48,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 805 transitions. [2021-03-10 21:58:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:48,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:48,243 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:48,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:48,459 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:48,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:48,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2122286202, now seen corresponding path program 44 times [2021-03-10 21:58:48,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:48,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465439977] [2021-03-10 21:58:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465439977] [2021-03-10 21:58:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325608240] [2021-03-10 21:58:48,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:48,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:48,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:48,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:48,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:48,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-03-10 21:58:48,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309437538] [2021-03-10 21:58:48,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:48,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:48,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:58:48,564 INFO L87 Difference]: Start difference. First operand 265 states and 805 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:48,653 INFO L93 Difference]: Finished difference Result 414 states and 1209 transitions. [2021-03-10 21:58:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:48,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:48,654 INFO L225 Difference]: With dead ends: 414 [2021-03-10 21:58:48,654 INFO L226 Difference]: Without dead ends: 414 [2021-03-10 21:58:48,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:58:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-03-10 21:58:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 267. [2021-03-10 21:58:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.0526315789473686) internal successors, (812), 266 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 812 transitions. [2021-03-10 21:58:48,659 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 812 transitions. Word has length 18 [2021-03-10 21:58:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:48,659 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 812 transitions. [2021-03-10 21:58:48,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 812 transitions. [2021-03-10 21:58:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:48,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:48,660 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:48,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:48,860 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:48,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1312639000, now seen corresponding path program 37 times [2021-03-10 21:58:48,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:48,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577375573] [2021-03-10 21:58:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:48,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577375573] [2021-03-10 21:58:48,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:48,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:48,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344048679] [2021-03-10 21:58:48,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:48,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:48,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:48,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:48,904 INFO L87 Difference]: Start difference. First operand 267 states and 812 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:49,002 INFO L93 Difference]: Finished difference Result 546 states and 1555 transitions. [2021-03-10 21:58:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:49,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:49,004 INFO L225 Difference]: With dead ends: 546 [2021-03-10 21:58:49,004 INFO L226 Difference]: Without dead ends: 539 [2021-03-10 21:58:49,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-03-10 21:58:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 284. [2021-03-10 21:58:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.088339222614841) internal successors, (874), 283 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 874 transitions. [2021-03-10 21:58:49,009 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 874 transitions. Word has length 18 [2021-03-10 21:58:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:49,009 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 874 transitions. [2021-03-10 21:58:49,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 874 transitions. [2021-03-10 21:58:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:49,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:49,010 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:49,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-03-10 21:58:49,010 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:49,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:49,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1487916058, now seen corresponding path program 45 times [2021-03-10 21:58:49,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:49,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698668714] [2021-03-10 21:58:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:49,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698668714] [2021-03-10 21:58:49,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625298435] [2021-03-10 21:58:49,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:49,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:58:49,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:49,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:49,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-03-10 21:58:49,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526741274] [2021-03-10 21:58:49,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:49,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:49,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:49,180 INFO L87 Difference]: Start difference. First operand 284 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:49,315 INFO L93 Difference]: Finished difference Result 500 states and 1465 transitions. [2021-03-10 21:58:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:49,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:49,317 INFO L225 Difference]: With dead ends: 500 [2021-03-10 21:58:49,317 INFO L226 Difference]: Without dead ends: 500 [2021-03-10 21:58:49,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:58:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-03-10 21:58:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 289. [2021-03-10 21:58:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1215277777777777) internal successors, (899), 288 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 899 transitions. [2021-03-10 21:58:49,322 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 899 transitions. Word has length 18 [2021-03-10 21:58:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:49,322 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 899 transitions. [2021-03-10 21:58:49,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 899 transitions. [2021-03-10 21:58:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:49,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:49,323 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:49,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:49,545 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:49,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:49,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1313143516, now seen corresponding path program 46 times [2021-03-10 21:58:49,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:49,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859932885] [2021-03-10 21:58:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:49,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859932885] [2021-03-10 21:58:49,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:49,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:49,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764815278] [2021-03-10 21:58:49,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:49,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:49,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:49,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:49,586 INFO L87 Difference]: Start difference. First operand 289 states and 899 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:49,665 INFO L93 Difference]: Finished difference Result 486 states and 1414 transitions. [2021-03-10 21:58:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:49,667 INFO L225 Difference]: With dead ends: 486 [2021-03-10 21:58:49,667 INFO L226 Difference]: Without dead ends: 480 [2021-03-10 21:58:49,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-03-10 21:58:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 295. [2021-03-10 21:58:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0918367346938775) internal successors, (909), 294 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-03-10 21:58:49,672 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 18 [2021-03-10 21:58:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:49,672 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-03-10 21:58:49,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-03-10 21:58:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:49,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:49,673 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:49,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-03-10 21:58:49,673 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:49,673 INFO L82 PathProgramCache]: Analyzing trace with hash -127799318, now seen corresponding path program 38 times [2021-03-10 21:58:49,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:49,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836251424] [2021-03-10 21:58:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:49,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836251424] [2021-03-10 21:58:49,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:49,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:49,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063746320] [2021-03-10 21:58:49,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:49,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:49,718 INFO L87 Difference]: Start difference. First operand 295 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:49,812 INFO L93 Difference]: Finished difference Result 566 states and 1625 transitions. [2021-03-10 21:58:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:49,813 INFO L225 Difference]: With dead ends: 566 [2021-03-10 21:58:49,813 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 21:58:49,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 21:58:49,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 292. [2021-03-10 21:58:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.0962199312714778) internal successors, (901), 291 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 901 transitions. [2021-03-10 21:58:49,818 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 901 transitions. Word has length 18 [2021-03-10 21:58:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:49,818 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 901 transitions. [2021-03-10 21:58:49,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 901 transitions. [2021-03-10 21:58:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:49,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:49,819 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:49,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-03-10 21:58:49,819 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:49,819 INFO L82 PathProgramCache]: Analyzing trace with hash 127502256, now seen corresponding path program 39 times [2021-03-10 21:58:49,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:49,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118088468] [2021-03-10 21:58:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:49,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118088468] [2021-03-10 21:58:49,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:49,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:49,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465846255] [2021-03-10 21:58:49,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:49,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:49,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:49,855 INFO L87 Difference]: Start difference. First operand 292 states and 901 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:49,998 INFO L93 Difference]: Finished difference Result 592 states and 1667 transitions. [2021-03-10 21:58:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:49,999 INFO L225 Difference]: With dead ends: 592 [2021-03-10 21:58:49,999 INFO L226 Difference]: Without dead ends: 585 [2021-03-10 21:58:50,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-03-10 21:58:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 296. [2021-03-10 21:58:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1016949152542375) internal successors, (915), 295 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 915 transitions. [2021-03-10 21:58:50,006 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 915 transitions. Word has length 18 [2021-03-10 21:58:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:50,006 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 915 transitions. [2021-03-10 21:58:50,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 915 transitions. [2021-03-10 21:58:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:50,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:50,006 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:50,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-03-10 21:58:50,007 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1799562216, now seen corresponding path program 40 times [2021-03-10 21:58:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:50,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097924229] [2021-03-10 21:58:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:50,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097924229] [2021-03-10 21:58:50,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:50,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:50,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73561464] [2021-03-10 21:58:50,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:50,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:50,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:50,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:50,048 INFO L87 Difference]: Start difference. First operand 296 states and 915 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:50,208 INFO L93 Difference]: Finished difference Result 567 states and 1631 transitions. [2021-03-10 21:58:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:50,210 INFO L225 Difference]: With dead ends: 567 [2021-03-10 21:58:50,210 INFO L226 Difference]: Without dead ends: 567 [2021-03-10 21:58:50,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-03-10 21:58:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 294. [2021-03-10 21:58:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.10580204778157) internal successors, (910), 293 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-03-10 21:58:50,216 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-03-10 21:58:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:50,216 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-03-10 21:58:50,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-03-10 21:58:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:50,217 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:50,217 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:50,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-03-10 21:58:50,217 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash -736515620, now seen corresponding path program 47 times [2021-03-10 21:58:50,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:50,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585192071] [2021-03-10 21:58:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:50,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585192071] [2021-03-10 21:58:50,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730913933] [2021-03-10 21:58:50,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:50,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:50,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:50,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:50,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:50,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:50,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:58:50,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836920936] [2021-03-10 21:58:50,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:58:50,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:50,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:58:50,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:50,377 INFO L87 Difference]: Start difference. First operand 294 states and 910 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:50,632 INFO L93 Difference]: Finished difference Result 660 states and 1879 transitions. [2021-03-10 21:58:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:58:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:50,634 INFO L225 Difference]: With dead ends: 660 [2021-03-10 21:58:50,634 INFO L226 Difference]: Without dead ends: 660 [2021-03-10 21:58:50,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:58:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-03-10 21:58:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 297. [2021-03-10 21:58:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.125) internal successors, (925), 296 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 925 transitions. [2021-03-10 21:58:50,641 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 925 transitions. Word has length 18 [2021-03-10 21:58:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:50,641 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 925 transitions. [2021-03-10 21:58:50,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 925 transitions. [2021-03-10 21:58:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:50,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:50,642 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:50,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:50,851 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:50,852 INFO L82 PathProgramCache]: Analyzing trace with hash 555826780, now seen corresponding path program 48 times [2021-03-10 21:58:50,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:50,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820688529] [2021-03-10 21:58:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:50,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820688529] [2021-03-10 21:58:50,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784897772] [2021-03-10 21:58:50,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:50,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:58:50,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:50,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:50,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:50,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:50,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-03-10 21:58:50,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350265541] [2021-03-10 21:58:50,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:50,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:50,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:50,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:50,998 INFO L87 Difference]: Start difference. First operand 297 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:51,128 INFO L93 Difference]: Finished difference Result 528 states and 1554 transitions. [2021-03-10 21:58:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:51,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:51,130 INFO L225 Difference]: With dead ends: 528 [2021-03-10 21:58:51,130 INFO L226 Difference]: Without dead ends: 528 [2021-03-10 21:58:51,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:58:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-03-10 21:58:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 294. [2021-03-10 21:58:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.10580204778157) internal successors, (910), 293 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-03-10 21:58:51,138 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-03-10 21:58:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:51,138 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-03-10 21:58:51,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-03-10 21:58:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:51,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:51,139 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:51,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-03-10 21:58:51,339 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:51,340 INFO L82 PathProgramCache]: Analyzing trace with hash -715779092, now seen corresponding path program 49 times [2021-03-10 21:58:51,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:51,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904249347] [2021-03-10 21:58:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904249347] [2021-03-10 21:58:51,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:51,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:51,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95074870] [2021-03-10 21:58:51,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:51,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:51,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:51,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:51,385 INFO L87 Difference]: Start difference. First operand 294 states and 910 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:51,489 INFO L93 Difference]: Finished difference Result 525 states and 1502 transitions. [2021-03-10 21:58:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:51,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:51,490 INFO L225 Difference]: With dead ends: 525 [2021-03-10 21:58:51,490 INFO L226 Difference]: Without dead ends: 519 [2021-03-10 21:58:51,491 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-03-10 21:58:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 298. [2021-03-10 21:58:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.111111111111111) internal successors, (924), 297 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-03-10 21:58:51,496 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-03-10 21:58:51,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:51,496 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-03-10 21:58:51,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-03-10 21:58:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:51,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:51,497 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:51,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-03-10 21:58:51,497 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:51,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1663764278, now seen corresponding path program 50 times [2021-03-10 21:58:51,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:51,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399797649] [2021-03-10 21:58:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:51,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399797649] [2021-03-10 21:58:51,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:51,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:51,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597454155] [2021-03-10 21:58:51,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:51,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:51,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:51,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:51,545 INFO L87 Difference]: Start difference. First operand 298 states and 924 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:51,679 INFO L93 Difference]: Finished difference Result 531 states and 1503 transitions. [2021-03-10 21:58:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:58:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:51,681 INFO L225 Difference]: With dead ends: 531 [2021-03-10 21:58:51,681 INFO L226 Difference]: Without dead ends: 531 [2021-03-10 21:58:51,681 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-03-10 21:58:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 296. [2021-03-10 21:58:51,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1152542372881356) internal successors, (919), 295 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 919 transitions. [2021-03-10 21:58:51,687 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 919 transitions. Word has length 18 [2021-03-10 21:58:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:51,687 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 919 transitions. [2021-03-10 21:58:51,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 919 transitions. [2021-03-10 21:58:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:51,688 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:51,688 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:51,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-03-10 21:58:51,688 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash -220184744, now seen corresponding path program 41 times [2021-03-10 21:58:51,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:51,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412313709] [2021-03-10 21:58:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412313709] [2021-03-10 21:58:51,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:51,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:51,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812545900] [2021-03-10 21:58:51,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:51,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:51,735 INFO L87 Difference]: Start difference. First operand 296 states and 919 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:51,838 INFO L93 Difference]: Finished difference Result 638 states and 1819 transitions. [2021-03-10 21:58:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:51,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:51,839 INFO L225 Difference]: With dead ends: 638 [2021-03-10 21:58:51,840 INFO L226 Difference]: Without dead ends: 638 [2021-03-10 21:58:51,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-03-10 21:58:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 299. [2021-03-10 21:58:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.134228187919463) internal successors, (934), 298 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 934 transitions. [2021-03-10 21:58:51,846 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 934 transitions. Word has length 18 [2021-03-10 21:58:51,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:51,846 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 934 transitions. [2021-03-10 21:58:51,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 934 transitions. [2021-03-10 21:58:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:51,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:51,848 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:51,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-03-10 21:58:51,849 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:51,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1404153024, now seen corresponding path program 42 times [2021-03-10 21:58:51,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:51,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381390125] [2021-03-10 21:58:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:51,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381390125] [2021-03-10 21:58:51,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:51,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:51,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738005729] [2021-03-10 21:58:51,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:51,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:51,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:51,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:51,902 INFO L87 Difference]: Start difference. First operand 299 states and 934 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:52,035 INFO L93 Difference]: Finished difference Result 599 states and 1729 transitions. [2021-03-10 21:58:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:52,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:52,037 INFO L225 Difference]: With dead ends: 599 [2021-03-10 21:58:52,038 INFO L226 Difference]: Without dead ends: 599 [2021-03-10 21:58:52,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-03-10 21:58:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 295. [2021-03-10 21:58:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.1054421768707483) internal successors, (913), 294 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 913 transitions. [2021-03-10 21:58:52,050 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 913 transitions. Word has length 18 [2021-03-10 21:58:52,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:52,050 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 913 transitions. [2021-03-10 21:58:52,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,050 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 913 transitions. [2021-03-10 21:58:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:52,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:52,051 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:52,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-03-10 21:58:52,052 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:52,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1984926374, now seen corresponding path program 43 times [2021-03-10 21:58:52,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:52,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253296920] [2021-03-10 21:58:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:52,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253296920] [2021-03-10 21:58:52,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:52,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:52,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905602301] [2021-03-10 21:58:52,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:52,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:52,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:52,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:52,087 INFO L87 Difference]: Start difference. First operand 295 states and 913 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:52,213 INFO L93 Difference]: Finished difference Result 556 states and 1586 transitions. [2021-03-10 21:58:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:52,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:52,214 INFO L225 Difference]: With dead ends: 556 [2021-03-10 21:58:52,214 INFO L226 Difference]: Without dead ends: 549 [2021-03-10 21:58:52,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:52,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-03-10 21:58:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 303. [2021-03-10 21:58:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.109271523178808) internal successors, (939), 302 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 939 transitions. [2021-03-10 21:58:52,222 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 939 transitions. Word has length 18 [2021-03-10 21:58:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:52,223 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 939 transitions. [2021-03-10 21:58:52,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 939 transitions. [2021-03-10 21:58:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:52,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:52,224 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:52,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-03-10 21:58:52,224 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash 382976450, now seen corresponding path program 44 times [2021-03-10 21:58:52,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:52,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853206902] [2021-03-10 21:58:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:52,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853206902] [2021-03-10 21:58:52,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:52,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:52,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676109543] [2021-03-10 21:58:52,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:52,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:52,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:52,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:52,260 INFO L87 Difference]: Start difference. First operand 303 states and 939 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:52,402 INFO L93 Difference]: Finished difference Result 555 states and 1591 transitions. [2021-03-10 21:58:52,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:52,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:52,404 INFO L225 Difference]: With dead ends: 555 [2021-03-10 21:58:52,404 INFO L226 Difference]: Without dead ends: 555 [2021-03-10 21:58:52,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:52,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-03-10 21:58:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 299. [2021-03-10 21:58:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.1040268456375837) internal successors, (925), 298 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 925 transitions. [2021-03-10 21:58:52,410 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 925 transitions. Word has length 18 [2021-03-10 21:58:52,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:52,410 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 925 transitions. [2021-03-10 21:58:52,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 925 transitions. [2021-03-10 21:58:52,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:52,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:52,411 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:52,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-03-10 21:58:52,411 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:52,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2139163544, now seen corresponding path program 45 times [2021-03-10 21:58:52,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:52,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512375669] [2021-03-10 21:58:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:52,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512375669] [2021-03-10 21:58:52,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:52,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:52,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262384442] [2021-03-10 21:58:52,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:52,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:52,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:52,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:52,444 INFO L87 Difference]: Start difference. First operand 299 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:52,562 INFO L93 Difference]: Finished difference Result 571 states and 1638 transitions. [2021-03-10 21:58:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:52,564 INFO L225 Difference]: With dead ends: 571 [2021-03-10 21:58:52,564 INFO L226 Difference]: Without dead ends: 571 [2021-03-10 21:58:52,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-03-10 21:58:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 297. [2021-03-10 21:58:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.108108108108108) internal successors, (920), 296 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 920 transitions. [2021-03-10 21:58:52,570 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 920 transitions. Word has length 18 [2021-03-10 21:58:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:52,570 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 920 transitions. [2021-03-10 21:58:52,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 920 transitions. [2021-03-10 21:58:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:52,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:52,570 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:52,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-03-10 21:58:52,571 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1023537320, now seen corresponding path program 51 times [2021-03-10 21:58:52,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:52,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249385633] [2021-03-10 21:58:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:52,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249385633] [2021-03-10 21:58:52,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308138892] [2021-03-10 21:58:52,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:52,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:58:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:52,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:52,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-03-10 21:58:52,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341747697] [2021-03-10 21:58:52,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:52,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:52,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:52,701 INFO L87 Difference]: Start difference. First operand 297 states and 920 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:52,817 INFO L93 Difference]: Finished difference Result 521 states and 1542 transitions. [2021-03-10 21:58:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:52,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:52,818 INFO L225 Difference]: With dead ends: 521 [2021-03-10 21:58:52,818 INFO L226 Difference]: Without dead ends: 521 [2021-03-10 21:58:52,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:58:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-10 21:58:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 298. [2021-03-10 21:58:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.1043771043771042) internal successors, (922), 297 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 922 transitions. [2021-03-10 21:58:52,824 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 922 transitions. Word has length 18 [2021-03-10 21:58:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:52,824 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 922 transitions. [2021-03-10 21:58:52,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 922 transitions. [2021-03-10 21:58:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:52,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:52,825 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:53,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-10 21:58:53,043 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:53,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1979087576, now seen corresponding path program 52 times [2021-03-10 21:58:53,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:53,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736789704] [2021-03-10 21:58:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:53,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736789704] [2021-03-10 21:58:53,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195149539] [2021-03-10 21:58:53,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:53,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:53,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:53,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:53,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:58:53,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798705354] [2021-03-10 21:58:53,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:58:53,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:58:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:53,177 INFO L87 Difference]: Start difference. First operand 298 states and 922 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:53,350 INFO L93 Difference]: Finished difference Result 598 states and 1740 transitions. [2021-03-10 21:58:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:58:53,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:53,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:53,352 INFO L225 Difference]: With dead ends: 598 [2021-03-10 21:58:53,352 INFO L226 Difference]: Without dead ends: 598 [2021-03-10 21:58:53,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:58:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-03-10 21:58:53,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 287. [2021-03-10 21:58:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0944055944055946) internal successors, (885), 286 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:53,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 885 transitions. [2021-03-10 21:58:53,358 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 885 transitions. Word has length 18 [2021-03-10 21:58:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:53,358 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 885 transitions. [2021-03-10 21:58:53,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 885 transitions. [2021-03-10 21:58:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:53,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:53,358 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:53,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-03-10 21:58:53,563 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:53,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1938415430, now seen corresponding path program 53 times [2021-03-10 21:58:53,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:53,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599008203] [2021-03-10 21:58:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:53,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599008203] [2021-03-10 21:58:53,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018740402] [2021-03-10 21:58:53,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:53,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:53,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:53,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:53,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-03-10 21:58:53,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730965930] [2021-03-10 21:58:53,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:53,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:53,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:53,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:53,710 INFO L87 Difference]: Start difference. First operand 287 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:53,815 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-03-10 21:58:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:53,816 INFO L225 Difference]: With dead ends: 511 [2021-03-10 21:58:53,816 INFO L226 Difference]: Without dead ends: 511 [2021-03-10 21:58:53,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:58:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-10 21:58:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-03-10 21:58:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0848056537102475) internal successors, (873), 283 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 873 transitions. [2021-03-10 21:58:53,821 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 873 transitions. Word has length 18 [2021-03-10 21:58:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:53,822 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 873 transitions. [2021-03-10 21:58:53,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 873 transitions. [2021-03-10 21:58:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:53,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:53,822 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:54,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:54,023 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:54,023 INFO L82 PathProgramCache]: Analyzing trace with hash -223183330, now seen corresponding path program 54 times [2021-03-10 21:58:54,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:54,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305975060] [2021-03-10 21:58:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:54,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305975060] [2021-03-10 21:58:54,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:54,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:54,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444055979] [2021-03-10 21:58:54,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:54,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:54,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:54,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:54,062 INFO L87 Difference]: Start difference. First operand 284 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:54,150 INFO L93 Difference]: Finished difference Result 452 states and 1305 transitions. [2021-03-10 21:58:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:58:54,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:54,151 INFO L225 Difference]: With dead ends: 452 [2021-03-10 21:58:54,151 INFO L226 Difference]: Without dead ends: 446 [2021-03-10 21:58:54,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-03-10 21:58:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 288. [2021-03-10 21:58:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.076655052264808) internal successors, (883), 287 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 883 transitions. [2021-03-10 21:58:54,156 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 883 transitions. Word has length 18 [2021-03-10 21:58:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:54,156 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 883 transitions. [2021-03-10 21:58:54,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,156 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 883 transitions. [2021-03-10 21:58:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:54,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:54,157 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:54,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-03-10 21:58:54,157 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:54,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2138607256, now seen corresponding path program 55 times [2021-03-10 21:58:54,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:54,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065950954] [2021-03-10 21:58:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:54,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065950954] [2021-03-10 21:58:54,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:54,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:54,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97615174] [2021-03-10 21:58:54,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:54,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:54,199 INFO L87 Difference]: Start difference. First operand 288 states and 883 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:54,306 INFO L93 Difference]: Finished difference Result 452 states and 1311 transitions. [2021-03-10 21:58:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:54,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:54,308 INFO L225 Difference]: With dead ends: 452 [2021-03-10 21:58:54,308 INFO L226 Difference]: Without dead ends: 452 [2021-03-10 21:58:54,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-03-10 21:58:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 286. [2021-03-10 21:58:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.0807017543859647) internal successors, (878), 285 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 878 transitions. [2021-03-10 21:58:54,312 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 878 transitions. Word has length 18 [2021-03-10 21:58:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:54,312 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 878 transitions. [2021-03-10 21:58:54,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 878 transitions. [2021-03-10 21:58:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:54,313 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:54,313 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:54,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-03-10 21:58:54,313 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash 827662620, now seen corresponding path program 56 times [2021-03-10 21:58:54,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:54,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832620531] [2021-03-10 21:58:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:54,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832620531] [2021-03-10 21:58:54,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:54,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:54,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106178008] [2021-03-10 21:58:54,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:54,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:54,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:54,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:54,347 INFO L87 Difference]: Start difference. First operand 286 states and 878 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:54,446 INFO L93 Difference]: Finished difference Result 431 states and 1257 transitions. [2021-03-10 21:58:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:54,447 INFO L225 Difference]: With dead ends: 431 [2021-03-10 21:58:54,447 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 21:58:54,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 21:58:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 286. [2021-03-10 21:58:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.0807017543859647) internal successors, (878), 285 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 878 transitions. [2021-03-10 21:58:54,452 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 878 transitions. Word has length 18 [2021-03-10 21:58:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:54,452 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 878 transitions. [2021-03-10 21:58:54,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 878 transitions. [2021-03-10 21:58:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:54,453 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:54,453 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:54,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-03-10 21:58:54,453 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash -150074708, now seen corresponding path program 46 times [2021-03-10 21:58:54,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:54,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492380910] [2021-03-10 21:58:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:54,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492380910] [2021-03-10 21:58:54,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:54,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:54,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503489286] [2021-03-10 21:58:54,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:54,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:54,494 INFO L87 Difference]: Start difference. First operand 286 states and 878 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:54,597 INFO L93 Difference]: Finished difference Result 508 states and 1470 transitions. [2021-03-10 21:58:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:54,599 INFO L225 Difference]: With dead ends: 508 [2021-03-10 21:58:54,599 INFO L226 Difference]: Without dead ends: 508 [2021-03-10 21:58:54,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-03-10 21:58:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 287. [2021-03-10 21:58:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.076923076923077) internal successors, (880), 286 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 880 transitions. [2021-03-10 21:58:54,604 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 880 transitions. Word has length 18 [2021-03-10 21:58:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:54,604 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 880 transitions. [2021-03-10 21:58:54,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,604 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 880 transitions. [2021-03-10 21:58:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:54,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:54,605 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:54,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-03-10 21:58:54,605 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:54,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1474263060, now seen corresponding path program 47 times [2021-03-10 21:58:54,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:54,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032368987] [2021-03-10 21:58:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:54,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032368987] [2021-03-10 21:58:54,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:54,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:54,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965784787] [2021-03-10 21:58:54,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:54,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:54,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:54,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:54,660 INFO L87 Difference]: Start difference. First operand 287 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:54,787 INFO L93 Difference]: Finished difference Result 511 states and 1476 transitions. [2021-03-10 21:58:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:54,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:54,788 INFO L225 Difference]: With dead ends: 511 [2021-03-10 21:58:54,789 INFO L226 Difference]: Without dead ends: 511 [2021-03-10 21:58:54,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-10 21:58:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-03-10 21:58:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.056537102473498) internal successors, (865), 283 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 865 transitions. [2021-03-10 21:58:54,794 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 865 transitions. Word has length 18 [2021-03-10 21:58:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:54,794 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 865 transitions. [2021-03-10 21:58:54,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 865 transitions. [2021-03-10 21:58:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:54,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:54,794 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:54,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-03-10 21:58:54,794 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:54,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1780468438, now seen corresponding path program 48 times [2021-03-10 21:58:54,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:54,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397036130] [2021-03-10 21:58:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:54,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397036130] [2021-03-10 21:58:54,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:54,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:54,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123191480] [2021-03-10 21:58:54,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:54,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:54,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:54,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:54,841 INFO L87 Difference]: Start difference. First operand 284 states and 865 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:54,952 INFO L93 Difference]: Finished difference Result 502 states and 1444 transitions. [2021-03-10 21:58:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:54,961 INFO L225 Difference]: With dead ends: 502 [2021-03-10 21:58:54,961 INFO L226 Difference]: Without dead ends: 502 [2021-03-10 21:58:54,961 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-03-10 21:58:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 273. [2021-03-10 21:58:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0661764705882355) internal successors, (834), 272 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 834 transitions. [2021-03-10 21:58:54,966 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 834 transitions. Word has length 18 [2021-03-10 21:58:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:54,966 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 834 transitions. [2021-03-10 21:58:54,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 834 transitions. [2021-03-10 21:58:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:54,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:54,967 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:54,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-03-10 21:58:54,967 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:54,968 INFO L82 PathProgramCache]: Analyzing trace with hash -388587486, now seen corresponding path program 49 times [2021-03-10 21:58:54,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:54,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170791354] [2021-03-10 21:58:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:54,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170791354] [2021-03-10 21:58:54,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:54,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:54,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60744826] [2021-03-10 21:58:55,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:55,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:55,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:55,000 INFO L87 Difference]: Start difference. First operand 273 states and 834 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:55,110 INFO L93 Difference]: Finished difference Result 421 states and 1245 transitions. [2021-03-10 21:58:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:55,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:55,111 INFO L225 Difference]: With dead ends: 421 [2021-03-10 21:58:55,111 INFO L226 Difference]: Without dead ends: 414 [2021-03-10 21:58:55,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-03-10 21:58:55,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 290. [2021-03-10 21:58:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.069204152249135) internal successors, (887), 289 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 887 transitions. [2021-03-10 21:58:55,116 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 887 transitions. Word has length 18 [2021-03-10 21:58:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:55,116 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 887 transitions. [2021-03-10 21:58:55,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 887 transitions. [2021-03-10 21:58:55,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:55,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:55,116 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:55,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-03-10 21:58:55,117 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:55,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1829025804, now seen corresponding path program 50 times [2021-03-10 21:58:55,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:55,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426808289] [2021-03-10 21:58:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:55,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426808289] [2021-03-10 21:58:55,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:55,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:55,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879674578] [2021-03-10 21:58:55,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:55,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:55,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:55,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:55,154 INFO L87 Difference]: Start difference. First operand 290 states and 887 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:55,301 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-03-10 21:58:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:55,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:55,302 INFO L225 Difference]: With dead ends: 423 [2021-03-10 21:58:55,302 INFO L226 Difference]: Without dead ends: 423 [2021-03-10 21:58:55,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-03-10 21:58:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 287. [2021-03-10 21:58:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0734265734265733) internal successors, (879), 286 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 879 transitions. [2021-03-10 21:58:55,307 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 879 transitions. Word has length 18 [2021-03-10 21:58:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:55,307 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 879 transitions. [2021-03-10 21:58:55,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 879 transitions. [2021-03-10 21:58:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:55,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:55,308 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:55,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-03-10 21:58:55,308 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash -753314648, now seen corresponding path program 51 times [2021-03-10 21:58:55,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:55,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103189660] [2021-03-10 21:58:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:55,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103189660] [2021-03-10 21:58:55,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:55,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:55,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223751404] [2021-03-10 21:58:55,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:55,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:55,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:55,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:55,345 INFO L87 Difference]: Start difference. First operand 287 states and 879 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:55,461 INFO L93 Difference]: Finished difference Result 457 states and 1358 transitions. [2021-03-10 21:58:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:55,463 INFO L225 Difference]: With dead ends: 457 [2021-03-10 21:58:55,463 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 21:58:55,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 21:58:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 284. [2021-03-10 21:58:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.07773851590106) internal successors, (871), 283 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 871 transitions. [2021-03-10 21:58:55,467 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 871 transitions. Word has length 18 [2021-03-10 21:58:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:55,468 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 871 transitions. [2021-03-10 21:58:55,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 871 transitions. [2021-03-10 21:58:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:55,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:55,468 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:55,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-03-10 21:58:55,468 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1623768616, now seen corresponding path program 52 times [2021-03-10 21:58:55,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:55,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335032140] [2021-03-10 21:58:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:55,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335032140] [2021-03-10 21:58:55,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:55,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:55,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925068757] [2021-03-10 21:58:55,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:55,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:55,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:55,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:55,503 INFO L87 Difference]: Start difference. First operand 284 states and 871 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:55,622 INFO L93 Difference]: Finished difference Result 519 states and 1486 transitions. [2021-03-10 21:58:55,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:55,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:55,623 INFO L225 Difference]: With dead ends: 519 [2021-03-10 21:58:55,623 INFO L226 Difference]: Without dead ends: 512 [2021-03-10 21:58:55,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-03-10 21:58:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 291. [2021-03-10 21:58:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1) internal successors, (899), 290 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 899 transitions. [2021-03-10 21:58:55,628 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 899 transitions. Word has length 18 [2021-03-10 21:58:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:55,628 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 899 transitions. [2021-03-10 21:58:55,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 899 transitions. [2021-03-10 21:58:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:55,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:55,629 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:55,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-03-10 21:58:55,629 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:55,629 INFO L82 PathProgramCache]: Analyzing trace with hash 183330298, now seen corresponding path program 53 times [2021-03-10 21:58:55,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:55,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173041990] [2021-03-10 21:58:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:55,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173041990] [2021-03-10 21:58:55,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:55,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:55,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796518870] [2021-03-10 21:58:55,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:55,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:55,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:55,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:55,663 INFO L87 Difference]: Start difference. First operand 291 states and 899 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:55,807 INFO L93 Difference]: Finished difference Result 528 states and 1521 transitions. [2021-03-10 21:58:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:55,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:55,808 INFO L225 Difference]: With dead ends: 528 [2021-03-10 21:58:55,808 INFO L226 Difference]: Without dead ends: 528 [2021-03-10 21:58:55,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-03-10 21:58:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 285. [2021-03-10 21:58:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-03-10 21:58:55,814 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-03-10 21:58:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:55,814 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-03-10 21:58:55,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-03-10 21:58:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:55,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:55,815 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:55,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-03-10 21:58:55,815 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:55,815 INFO L82 PathProgramCache]: Analyzing trace with hash 438631872, now seen corresponding path program 54 times [2021-03-10 21:58:55,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:55,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679557149] [2021-03-10 21:58:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:55,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679557149] [2021-03-10 21:58:55,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:55,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:55,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694693894] [2021-03-10 21:58:55,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:55,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:55,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:55,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:55,848 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:55,934 INFO L93 Difference]: Finished difference Result 476 states and 1379 transitions. [2021-03-10 21:58:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:55,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:55,936 INFO L225 Difference]: With dead ends: 476 [2021-03-10 21:58:55,936 INFO L226 Difference]: Without dead ends: 469 [2021-03-10 21:58:55,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-10 21:58:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 289. [2021-03-10 21:58:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.09375) internal successors, (891), 288 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 891 transitions. [2021-03-10 21:58:55,941 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 891 transitions. Word has length 18 [2021-03-10 21:58:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:55,941 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 891 transitions. [2021-03-10 21:58:55,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 891 transitions. [2021-03-10 21:58:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:55,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:55,941 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:55,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-03-10 21:58:55,942 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:55,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1488432600, now seen corresponding path program 55 times [2021-03-10 21:58:55,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:55,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510275516] [2021-03-10 21:58:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:55,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510275516] [2021-03-10 21:58:55,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:55,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:55,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878719093] [2021-03-10 21:58:55,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:55,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:55,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:55,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:55,978 INFO L87 Difference]: Start difference. First operand 289 states and 891 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:56,074 INFO L93 Difference]: Finished difference Result 451 states and 1343 transitions. [2021-03-10 21:58:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:56,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:56,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:56,075 INFO L225 Difference]: With dead ends: 451 [2021-03-10 21:58:56,075 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 21:58:56,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 21:58:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 287. [2021-03-10 21:58:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.097902097902098) internal successors, (886), 286 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 886 transitions. [2021-03-10 21:58:56,081 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 886 transitions. Word has length 18 [2021-03-10 21:58:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:56,081 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 886 transitions. [2021-03-10 21:58:56,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 886 transitions. [2021-03-10 21:58:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:56,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:56,081 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:56,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-03-10 21:58:56,082 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:56,082 INFO L82 PathProgramCache]: Analyzing trace with hash 90944872, now seen corresponding path program 56 times [2021-03-10 21:58:56,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:56,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51733814] [2021-03-10 21:58:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:56,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51733814] [2021-03-10 21:58:56,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:56,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:56,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129922891] [2021-03-10 21:58:56,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:56,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:56,117 INFO L87 Difference]: Start difference. First operand 287 states and 886 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:56,234 INFO L93 Difference]: Finished difference Result 511 states and 1492 transitions. [2021-03-10 21:58:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:56,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:56,236 INFO L225 Difference]: With dead ends: 511 [2021-03-10 21:58:56,236 INFO L226 Difference]: Without dead ends: 511 [2021-03-10 21:58:56,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-10 21:58:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 290. [2021-03-10 21:58:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.1176470588235294) internal successors, (901), 289 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 901 transitions. [2021-03-10 21:58:56,241 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 901 transitions. Word has length 18 [2021-03-10 21:58:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:56,241 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 901 transitions. [2021-03-10 21:58:56,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 901 transitions. [2021-03-10 21:58:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:56,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:56,242 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:56,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-03-10 21:58:56,242 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:56,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:56,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1715282640, now seen corresponding path program 57 times [2021-03-10 21:58:56,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:56,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305130341] [2021-03-10 21:58:56,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:56,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305130341] [2021-03-10 21:58:56,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:56,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:56,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017846029] [2021-03-10 21:58:56,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:56,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:56,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:56,279 INFO L87 Difference]: Start difference. First operand 290 states and 901 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:56,375 INFO L93 Difference]: Finished difference Result 475 states and 1412 transitions. [2021-03-10 21:58:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:56,376 INFO L225 Difference]: With dead ends: 475 [2021-03-10 21:58:56,376 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 21:58:56,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 21:58:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 286. [2021-03-10 21:58:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.087719298245614) internal successors, (880), 285 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 880 transitions. [2021-03-10 21:58:56,381 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 880 transitions. Word has length 18 [2021-03-10 21:58:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:56,381 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 880 transitions. [2021-03-10 21:58:56,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 880 transitions. [2021-03-10 21:58:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:56,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:56,382 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:56,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-03-10 21:58:56,382 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:56,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:56,382 INFO L82 PathProgramCache]: Analyzing trace with hash 677704442, now seen corresponding path program 58 times [2021-03-10 21:58:56,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:56,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88834054] [2021-03-10 21:58:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:56,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88834054] [2021-03-10 21:58:56,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:56,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:56,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267093160] [2021-03-10 21:58:56,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:56,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:56,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:56,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:56,422 INFO L87 Difference]: Start difference. First operand 286 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:56,535 INFO L93 Difference]: Finished difference Result 553 states and 1642 transitions. [2021-03-10 21:58:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:56,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:56,537 INFO L225 Difference]: With dead ends: 553 [2021-03-10 21:58:56,537 INFO L226 Difference]: Without dead ends: 553 [2021-03-10 21:58:56,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-03-10 21:58:56,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-03-10 21:58:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.0972222222222223) internal successors, (892), 288 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 892 transitions. [2021-03-10 21:58:56,542 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 892 transitions. Word has length 18 [2021-03-10 21:58:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:56,542 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 892 transitions. [2021-03-10 21:58:56,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 892 transitions. [2021-03-10 21:58:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:56,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:56,543 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:56,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-03-10 21:58:56,543 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:56,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1850997812, now seen corresponding path program 59 times [2021-03-10 21:58:56,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:56,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140086830] [2021-03-10 21:58:56,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:56,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140086830] [2021-03-10 21:58:56,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:56,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:56,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425743108] [2021-03-10 21:58:56,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:56,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:56,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:56,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:56,579 INFO L87 Difference]: Start difference. First operand 289 states and 892 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:56,695 INFO L93 Difference]: Finished difference Result 531 states and 1576 transitions. [2021-03-10 21:58:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:56,696 INFO L225 Difference]: With dead ends: 531 [2021-03-10 21:58:56,696 INFO L226 Difference]: Without dead ends: 531 [2021-03-10 21:58:56,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-03-10 21:58:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 292. [2021-03-10 21:58:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1168384879725086) internal successors, (907), 291 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 907 transitions. [2021-03-10 21:58:56,701 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 907 transitions. Word has length 18 [2021-03-10 21:58:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:56,701 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 907 transitions. [2021-03-10 21:58:56,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 907 transitions. [2021-03-10 21:58:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:56,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:56,702 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:56,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-03-10 21:58:56,702 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:56,702 INFO L82 PathProgramCache]: Analyzing trace with hash -819631716, now seen corresponding path program 60 times [2021-03-10 21:58:56,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:56,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391346146] [2021-03-10 21:58:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:56,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391346146] [2021-03-10 21:58:56,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:56,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:56,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029019724] [2021-03-10 21:58:56,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:56,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:56,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:56,735 INFO L87 Difference]: Start difference. First operand 292 states and 907 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:56,837 INFO L93 Difference]: Finished difference Result 489 states and 1481 transitions. [2021-03-10 21:58:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:56,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:56,839 INFO L225 Difference]: With dead ends: 489 [2021-03-10 21:58:56,839 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 21:58:56,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 21:58:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 285. [2021-03-10 21:58:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0809859154929575) internal successors, (875), 284 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 875 transitions. [2021-03-10 21:58:56,843 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 875 transitions. Word has length 18 [2021-03-10 21:58:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:56,844 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 875 transitions. [2021-03-10 21:58:56,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 875 transitions. [2021-03-10 21:58:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:56,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:56,844 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:56,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-03-10 21:58:56,844 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:56,845 INFO L82 PathProgramCache]: Analyzing trace with hash 775146144, now seen corresponding path program 61 times [2021-03-10 21:58:56,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:56,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908393956] [2021-03-10 21:58:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:56,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908393956] [2021-03-10 21:58:56,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:56,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:56,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690672576] [2021-03-10 21:58:56,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:56,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:56,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:56,878 INFO L87 Difference]: Start difference. First operand 285 states and 875 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:56,950 INFO L93 Difference]: Finished difference Result 471 states and 1374 transitions. [2021-03-10 21:58:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:56,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:56,951 INFO L225 Difference]: With dead ends: 471 [2021-03-10 21:58:56,951 INFO L226 Difference]: Without dead ends: 464 [2021-03-10 21:58:56,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:56,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-03-10 21:58:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 294. [2021-03-10 21:58:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.1296928327645053) internal successors, (917), 293 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 917 transitions. [2021-03-10 21:58:56,954 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 917 transitions. Word has length 18 [2021-03-10 21:58:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:56,954 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 917 transitions. [2021-03-10 21:58:56,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 917 transitions. [2021-03-10 21:58:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:56,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:56,955 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:56,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-03-10 21:58:56,955 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2025408914, now seen corresponding path program 57 times [2021-03-10 21:58:56,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:56,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120879354] [2021-03-10 21:58:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:57,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120879354] [2021-03-10 21:58:57,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:57,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:57,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394309790] [2021-03-10 21:58:57,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:57,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:57,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:57,006 INFO L87 Difference]: Start difference. First operand 294 states and 917 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:57,092 INFO L93 Difference]: Finished difference Result 540 states and 1577 transitions. [2021-03-10 21:58:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:57,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:57,093 INFO L225 Difference]: With dead ends: 540 [2021-03-10 21:58:57,094 INFO L226 Difference]: Without dead ends: 540 [2021-03-10 21:58:57,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:58:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-03-10 21:58:57,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 299. [2021-03-10 21:58:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.161073825503356) internal successors, (942), 298 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 942 transitions. [2021-03-10 21:58:57,099 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 942 transitions. Word has length 18 [2021-03-10 21:58:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:57,099 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 942 transitions. [2021-03-10 21:58:57,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 942 transitions. [2021-03-10 21:58:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:57,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:57,100 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:57,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2021-03-10 21:58:57,100 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:57,100 INFO L82 PathProgramCache]: Analyzing trace with hash 775650660, now seen corresponding path program 58 times [2021-03-10 21:58:57,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:57,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724500663] [2021-03-10 21:58:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:57,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724500663] [2021-03-10 21:58:57,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:57,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:57,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712160871] [2021-03-10 21:58:57,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:57,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:57,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:57,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:57,137 INFO L87 Difference]: Start difference. First operand 299 states and 942 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:57,233 INFO L93 Difference]: Finished difference Result 539 states and 1563 transitions. [2021-03-10 21:58:57,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:57,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:57,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:57,234 INFO L225 Difference]: With dead ends: 539 [2021-03-10 21:58:57,234 INFO L226 Difference]: Without dead ends: 533 [2021-03-10 21:58:57,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-10 21:58:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 305. [2021-03-10 21:58:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1315789473684212) internal successors, (952), 304 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 952 transitions. [2021-03-10 21:58:57,239 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 952 transitions. Word has length 18 [2021-03-10 21:58:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:57,239 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 952 transitions. [2021-03-10 21:58:57,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 952 transitions. [2021-03-10 21:58:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:57,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:57,240 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:57,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2021-03-10 21:58:57,240 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:57,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:57,241 INFO L82 PathProgramCache]: Analyzing trace with hash -665292174, now seen corresponding path program 62 times [2021-03-10 21:58:57,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:57,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038024781] [2021-03-10 21:58:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:57,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038024781] [2021-03-10 21:58:57,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:57,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:57,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23476977] [2021-03-10 21:58:57,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:57,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:57,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:57,280 INFO L87 Difference]: Start difference. First operand 305 states and 952 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:57,375 INFO L93 Difference]: Finished difference Result 491 states and 1444 transitions. [2021-03-10 21:58:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:57,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:57,376 INFO L225 Difference]: With dead ends: 491 [2021-03-10 21:58:57,376 INFO L226 Difference]: Without dead ends: 491 [2021-03-10 21:58:57,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-03-10 21:58:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 299. [2021-03-10 21:58:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-03-10 21:58:57,382 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-03-10 21:58:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:57,382 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-03-10 21:58:57,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-03-10 21:58:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:57,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:57,382 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:57,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-03-10 21:58:57,382 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:57,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:57,383 INFO L82 PathProgramCache]: Analyzing trace with hash -409990600, now seen corresponding path program 63 times [2021-03-10 21:58:57,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:57,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815134158] [2021-03-10 21:58:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:57,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815134158] [2021-03-10 21:58:57,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:57,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:57,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958961166] [2021-03-10 21:58:57,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:57,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:57,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:57,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:57,419 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:57,537 INFO L93 Difference]: Finished difference Result 517 states and 1486 transitions. [2021-03-10 21:58:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:57,539 INFO L225 Difference]: With dead ends: 517 [2021-03-10 21:58:57,539 INFO L226 Difference]: Without dead ends: 510 [2021-03-10 21:58:57,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-03-10 21:58:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 303. [2021-03-10 21:58:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1258278145695364) internal successors, (944), 302 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-03-10 21:58:57,544 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-03-10 21:58:57,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:57,544 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-03-10 21:58:57,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,544 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-03-10 21:58:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:57,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:57,544 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:57,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-03-10 21:58:57,545 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:57,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:57,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1957912224, now seen corresponding path program 64 times [2021-03-10 21:58:57,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:57,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068545814] [2021-03-10 21:58:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:57,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068545814] [2021-03-10 21:58:57,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:57,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:57,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972804319] [2021-03-10 21:58:57,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:57,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:57,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:57,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:57,582 INFO L87 Difference]: Start difference. First operand 303 states and 944 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:57,736 INFO L93 Difference]: Finished difference Result 492 states and 1450 transitions. [2021-03-10 21:58:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:57,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:57,737 INFO L225 Difference]: With dead ends: 492 [2021-03-10 21:58:57,737 INFO L226 Difference]: Without dead ends: 492 [2021-03-10 21:58:57,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-03-10 21:58:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 299. [2021-03-10 21:58:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-03-10 21:58:57,742 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-03-10 21:58:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:57,742 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-03-10 21:58:57,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-03-10 21:58:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:57,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:57,743 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:57,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2021-03-10 21:58:57,743 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1274008476, now seen corresponding path program 59 times [2021-03-10 21:58:57,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:57,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81772567] [2021-03-10 21:58:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:57,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81772567] [2021-03-10 21:58:57,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217469097] [2021-03-10 21:58:57,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:57,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:57,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:57,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:58:57,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:57,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:57,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:58:57,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964333743] [2021-03-10 21:58:57,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:58:57,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:58:57,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:57,937 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:58,199 INFO L93 Difference]: Finished difference Result 604 states and 1726 transitions. [2021-03-10 21:58:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:58:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:58,201 INFO L225 Difference]: With dead ends: 604 [2021-03-10 21:58:58,201 INFO L226 Difference]: Without dead ends: 604 [2021-03-10 21:58:58,201 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:58:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-03-10 21:58:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 302. [2021-03-10 21:58:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.13953488372093) internal successors, (945), 301 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 945 transitions. [2021-03-10 21:58:58,206 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 945 transitions. Word has length 18 [2021-03-10 21:58:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:58,206 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 945 transitions. [2021-03-10 21:58:58,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 945 transitions. [2021-03-10 21:58:58,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:58,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:58,207 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:58,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:58,408 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:58,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:58,408 INFO L82 PathProgramCache]: Analyzing trace with hash 18333924, now seen corresponding path program 60 times [2021-03-10 21:58:58,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:58,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773334157] [2021-03-10 21:58:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:58,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773334157] [2021-03-10 21:58:58,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260846738] [2021-03-10 21:58:58,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:58:58,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:58:58,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:58,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:58,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:58,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:58:58,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-03-10 21:58:58,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366826934] [2021-03-10 21:58:58,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:58,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:58,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:58,574 INFO L87 Difference]: Start difference. First operand 302 states and 945 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:58,724 INFO L93 Difference]: Finished difference Result 560 states and 1629 transitions. [2021-03-10 21:58:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:58,726 INFO L225 Difference]: With dead ends: 560 [2021-03-10 21:58:58,726 INFO L226 Difference]: Without dead ends: 560 [2021-03-10 21:58:58,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:58:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-03-10 21:58:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 299. [2021-03-10 21:58:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-03-10 21:58:58,731 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-03-10 21:58:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:58,731 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-03-10 21:58:58,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-03-10 21:58:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:58,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:58,732 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:58,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-10 21:58:58,932 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1253271948, now seen corresponding path program 61 times [2021-03-10 21:58:58,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:58,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314232270] [2021-03-10 21:58:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:58,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314232270] [2021-03-10 21:58:58,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:58,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:58,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821518244] [2021-03-10 21:58:58,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:58,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:58,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:58,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:58,973 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:59,062 INFO L93 Difference]: Finished difference Result 578 states and 1648 transitions. [2021-03-10 21:58:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:59,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:59,063 INFO L225 Difference]: With dead ends: 578 [2021-03-10 21:58:59,063 INFO L226 Difference]: Without dead ends: 572 [2021-03-10 21:58:59,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:59,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-03-10 21:58:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 303. [2021-03-10 21:58:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1258278145695364) internal successors, (944), 302 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-03-10 21:58:59,067 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-03-10 21:58:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:59,067 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-03-10 21:58:59,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-03-10 21:58:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:59,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:59,067 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:59,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-03-10 21:58:59,068 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1126271422, now seen corresponding path program 62 times [2021-03-10 21:58:59,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:59,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229607823] [2021-03-10 21:58:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:59,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229607823] [2021-03-10 21:58:59,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:59,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:59,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882360408] [2021-03-10 21:58:59,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:59,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:59,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:59,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:59,108 INFO L87 Difference]: Start difference. First operand 303 states and 944 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:59,217 INFO L93 Difference]: Finished difference Result 436 states and 1296 transitions. [2021-03-10 21:58:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:58:59,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:59,218 INFO L225 Difference]: With dead ends: 436 [2021-03-10 21:58:59,218 INFO L226 Difference]: Without dead ends: 436 [2021-03-10 21:58:59,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-03-10 21:58:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 301. [2021-03-10 21:58:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.13) internal successors, (939), 300 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 939 transitions. [2021-03-10 21:58:59,222 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 939 transitions. Word has length 18 [2021-03-10 21:58:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:59,222 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 939 transitions. [2021-03-10 21:58:59,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 939 transitions. [2021-03-10 21:58:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:59,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:59,223 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:59,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-03-10 21:58:59,223 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash -757677600, now seen corresponding path program 65 times [2021-03-10 21:58:59,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:59,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46673009] [2021-03-10 21:58:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:59,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46673009] [2021-03-10 21:58:59,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:59,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:59,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917594487] [2021-03-10 21:58:59,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:59,257 INFO L87 Difference]: Start difference. First operand 301 states and 939 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:59,363 INFO L93 Difference]: Finished difference Result 565 states and 1643 transitions. [2021-03-10 21:58:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:59,364 INFO L225 Difference]: With dead ends: 565 [2021-03-10 21:58:59,364 INFO L226 Difference]: Without dead ends: 565 [2021-03-10 21:58:59,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-10 21:58:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 304. [2021-03-10 21:58:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.1485148514851486) internal successors, (954), 303 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 954 transitions. [2021-03-10 21:58:59,368 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 954 transitions. Word has length 18 [2021-03-10 21:58:59,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:59,369 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 954 transitions. [2021-03-10 21:58:59,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 954 transitions. [2021-03-10 21:58:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:59,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:59,369 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:59,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-03-10 21:58:59,369 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash 866660168, now seen corresponding path program 66 times [2021-03-10 21:58:59,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:59,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978436626] [2021-03-10 21:58:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:59,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978436626] [2021-03-10 21:58:59,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:59,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:59,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608205094] [2021-03-10 21:58:59,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:59,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:59,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:59,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:59,410 INFO L87 Difference]: Start difference. First operand 304 states and 954 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:59,521 INFO L93 Difference]: Finished difference Result 526 states and 1553 transitions. [2021-03-10 21:58:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:59,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:59,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:59,522 INFO L225 Difference]: With dead ends: 526 [2021-03-10 21:58:59,522 INFO L226 Difference]: Without dead ends: 526 [2021-03-10 21:58:59,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-03-10 21:58:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 299. [2021-03-10 21:58:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.110738255033557) internal successors, (927), 298 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 927 transitions. [2021-03-10 21:58:59,526 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 927 transitions. Word has length 18 [2021-03-10 21:58:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:59,526 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 927 transitions. [2021-03-10 21:58:59,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 927 transitions. [2021-03-10 21:58:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:59,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:59,527 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:59,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-03-10 21:58:59,527 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:59,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1772548066, now seen corresponding path program 67 times [2021-03-10 21:58:59,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:59,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377340879] [2021-03-10 21:58:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:59,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377340879] [2021-03-10 21:58:59,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:59,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:59,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447259694] [2021-03-10 21:58:59,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:59,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:59,557 INFO L87 Difference]: Start difference. First operand 299 states and 927 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:59,656 INFO L93 Difference]: Finished difference Result 429 states and 1270 transitions. [2021-03-10 21:58:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:59,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:59,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:59,656 INFO L225 Difference]: With dead ends: 429 [2021-03-10 21:58:59,657 INFO L226 Difference]: Without dead ends: 422 [2021-03-10 21:58:59,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-03-10 21:58:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 305. [2021-03-10 21:58:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1184210526315788) internal successors, (948), 304 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 948 transitions. [2021-03-10 21:58:59,660 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 948 transitions. Word has length 18 [2021-03-10 21:58:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:59,660 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 948 transitions. [2021-03-10 21:58:59,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 948 transitions. [2021-03-10 21:58:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:59,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:59,661 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:59,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-03-10 21:58:59,661 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:59,661 INFO L82 PathProgramCache]: Analyzing trace with hash -154516406, now seen corresponding path program 68 times [2021-03-10 21:58:59,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:59,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134306554] [2021-03-10 21:58:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:59,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134306554] [2021-03-10 21:58:59,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:59,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:59,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951487610] [2021-03-10 21:58:59,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:59,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:59,693 INFO L87 Difference]: Start difference. First operand 305 states and 948 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:59,798 INFO L93 Difference]: Finished difference Result 428 states and 1275 transitions. [2021-03-10 21:58:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:59,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:59,799 INFO L225 Difference]: With dead ends: 428 [2021-03-10 21:58:59,799 INFO L226 Difference]: Without dead ends: 428 [2021-03-10 21:58:59,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-03-10 21:58:59,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 301. [2021-03-10 21:58:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.1133333333333333) internal successors, (934), 300 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 934 transitions. [2021-03-10 21:58:59,803 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 934 transitions. Word has length 18 [2021-03-10 21:58:59,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:59,803 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 934 transitions. [2021-03-10 21:58:59,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 934 transitions. [2021-03-10 21:58:59,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:59,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:59,804 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:59,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-03-10 21:58:59,804 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1618310896, now seen corresponding path program 69 times [2021-03-10 21:58:59,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:59,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766752151] [2021-03-10 21:58:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:59,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766752151] [2021-03-10 21:58:59,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:58:59,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:58:59,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033439582] [2021-03-10 21:58:59,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:58:59,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:59,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:58:59,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:58:59,831 INFO L87 Difference]: Start difference. First operand 301 states and 934 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:59,930 INFO L93 Difference]: Finished difference Result 444 states and 1322 transitions. [2021-03-10 21:58:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:58:59,930 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:58:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:59,931 INFO L225 Difference]: With dead ends: 444 [2021-03-10 21:58:59,931 INFO L226 Difference]: Without dead ends: 444 [2021-03-10 21:58:59,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:58:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-03-10 21:58:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 299. [2021-03-10 21:58:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.11744966442953) internal successors, (929), 298 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 929 transitions. [2021-03-10 21:58:59,935 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 929 transitions. Word has length 18 [2021-03-10 21:58:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:59,935 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 929 transitions. [2021-03-10 21:58:59,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 929 transitions. [2021-03-10 21:58:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:58:59,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:59,935 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:59,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-03-10 21:58:59,935 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:59,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:59,935 INFO L82 PathProgramCache]: Analyzing trace with hash 486044464, now seen corresponding path program 63 times [2021-03-10 21:58:59,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:59,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36446377] [2021-03-10 21:58:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:59,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36446377] [2021-03-10 21:58:59,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557388520] [2021-03-10 21:58:59,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:00,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:00,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:00,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:59:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:00,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:59:00,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-03-10 21:59:00,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250335686] [2021-03-10 21:59:00,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:00,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:00,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:59:00,082 INFO L87 Difference]: Start difference. First operand 299 states and 929 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:00,208 INFO L93 Difference]: Finished difference Result 518 states and 1517 transitions. [2021-03-10 21:59:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:00,209 INFO L225 Difference]: With dead ends: 518 [2021-03-10 21:59:00,209 INFO L226 Difference]: Without dead ends: 518 [2021-03-10 21:59:00,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:59:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-03-10 21:59:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 300. [2021-03-10 21:59:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.1137123745819397) internal successors, (931), 299 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 931 transitions. [2021-03-10 21:59:00,213 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 931 transitions. Word has length 18 [2021-03-10 21:59:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:00,213 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 931 transitions. [2021-03-10 21:59:00,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 931 transitions. [2021-03-10 21:59:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:00,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:00,214 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:00,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:00,427 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1778386864, now seen corresponding path program 64 times [2021-03-10 21:59:00,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:00,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831754709] [2021-03-10 21:59:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:00,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831754709] [2021-03-10 21:59:00,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614528676] [2021-03-10 21:59:00,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:00,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:00,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:00,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:59:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:00,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:00,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:59:00,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916062769] [2021-03-10 21:59:00,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:59:00,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:00,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:59:00,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:59:00,567 INFO L87 Difference]: Start difference. First operand 300 states and 931 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:00,725 INFO L93 Difference]: Finished difference Result 506 states and 1484 transitions. [2021-03-10 21:59:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:00,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:00,726 INFO L225 Difference]: With dead ends: 506 [2021-03-10 21:59:00,726 INFO L226 Difference]: Without dead ends: 506 [2021-03-10 21:59:00,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:59:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-10 21:59:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 289. [2021-03-10 21:59:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1041666666666665) internal successors, (894), 288 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-03-10 21:59:00,730 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-03-10 21:59:00,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:00,730 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-03-10 21:59:00,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-03-10 21:59:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:00,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:00,731 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:00,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-03-10 21:59:00,931 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:00,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1819059010, now seen corresponding path program 65 times [2021-03-10 21:59:00,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:00,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451723181] [2021-03-10 21:59:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:00,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451723181] [2021-03-10 21:59:00,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781820911] [2021-03-10 21:59:00,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:00,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:00,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:00,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:59:00,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:01,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:59:01,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-03-10 21:59:01,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740724343] [2021-03-10 21:59:01,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:01,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:01,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:01,054 INFO L87 Difference]: Start difference. First operand 289 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:01,180 INFO L93 Difference]: Finished difference Result 496 states and 1443 transitions. [2021-03-10 21:59:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:01,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:01,181 INFO L225 Difference]: With dead ends: 496 [2021-03-10 21:59:01,181 INFO L226 Difference]: Without dead ends: 496 [2021-03-10 21:59:01,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-03-10 21:59:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 286. [2021-03-10 21:59:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.094736842105263) internal successors, (882), 285 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-03-10 21:59:01,185 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-03-10 21:59:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:01,185 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-03-10 21:59:01,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-03-10 21:59:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:01,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:01,185 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:01,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:01,386 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:01,386 INFO L82 PathProgramCache]: Analyzing trace with hash -760676186, now seen corresponding path program 66 times [2021-03-10 21:59:01,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:01,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927731536] [2021-03-10 21:59:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:01,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927731536] [2021-03-10 21:59:01,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:01,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:01,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141742998] [2021-03-10 21:59:01,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:01,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:01,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:01,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:01,423 INFO L87 Difference]: Start difference. First operand 286 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:01,548 INFO L93 Difference]: Finished difference Result 455 states and 1310 transitions. [2021-03-10 21:59:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:01,549 INFO L225 Difference]: With dead ends: 455 [2021-03-10 21:59:01,549 INFO L226 Difference]: Without dead ends: 449 [2021-03-10 21:59:01,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-10 21:59:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 290. [2021-03-10 21:59:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.086505190311419) internal successors, (892), 289 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 892 transitions. [2021-03-10 21:59:01,552 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 892 transitions. Word has length 18 [2021-03-10 21:59:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:01,553 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 892 transitions. [2021-03-10 21:59:01,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 892 transitions. [2021-03-10 21:59:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:01,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:01,553 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:01,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2021-03-10 21:59:01,553 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1618867184, now seen corresponding path program 67 times [2021-03-10 21:59:01,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:01,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347350691] [2021-03-10 21:59:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:01,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347350691] [2021-03-10 21:59:01,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:01,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:01,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279334094] [2021-03-10 21:59:01,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:01,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:01,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:01,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:01,600 INFO L87 Difference]: Start difference. First operand 290 states and 892 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:01,721 INFO L93 Difference]: Finished difference Result 455 states and 1316 transitions. [2021-03-10 21:59:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:01,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:01,722 INFO L225 Difference]: With dead ends: 455 [2021-03-10 21:59:01,722 INFO L226 Difference]: Without dead ends: 455 [2021-03-10 21:59:01,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:59:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-03-10 21:59:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 288. [2021-03-10 21:59:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.0905923344947737) internal successors, (887), 287 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 887 transitions. [2021-03-10 21:59:01,726 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 887 transitions. Word has length 18 [2021-03-10 21:59:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:01,726 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 887 transitions. [2021-03-10 21:59:01,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 887 transitions. [2021-03-10 21:59:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:01,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:01,726 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:01,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-03-10 21:59:01,726 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash 290169764, now seen corresponding path program 68 times [2021-03-10 21:59:01,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:01,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156329597] [2021-03-10 21:59:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:01,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156329597] [2021-03-10 21:59:01,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:01,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:01,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543232980] [2021-03-10 21:59:01,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:01,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:01,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:01,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:01,757 INFO L87 Difference]: Start difference. First operand 288 states and 887 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:01,855 INFO L93 Difference]: Finished difference Result 486 states and 1387 transitions. [2021-03-10 21:59:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:59:01,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:01,856 INFO L225 Difference]: With dead ends: 486 [2021-03-10 21:59:01,856 INFO L226 Difference]: Without dead ends: 486 [2021-03-10 21:59:01,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:59:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-10 21:59:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 286. [2021-03-10 21:59:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.094736842105263) internal successors, (882), 285 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-03-10 21:59:01,860 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-03-10 21:59:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:01,860 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-03-10 21:59:01,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-03-10 21:59:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:01,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:01,860 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:01,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2021-03-10 21:59:01,861 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash -687567564, now seen corresponding path program 70 times [2021-03-10 21:59:01,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:01,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181362191] [2021-03-10 21:59:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:01,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181362191] [2021-03-10 21:59:01,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:01,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:01,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282608587] [2021-03-10 21:59:01,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:01,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:01,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:01,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:01,893 INFO L87 Difference]: Start difference. First operand 286 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:01,985 INFO L93 Difference]: Finished difference Result 514 states and 1519 transitions. [2021-03-10 21:59:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:01,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:01,986 INFO L225 Difference]: With dead ends: 514 [2021-03-10 21:59:01,986 INFO L226 Difference]: Without dead ends: 514 [2021-03-10 21:59:01,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:59:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-03-10 21:59:01,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 292. [2021-03-10 21:59:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1237113402061856) internal successors, (909), 291 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 909 transitions. [2021-03-10 21:59:01,990 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 909 transitions. Word has length 18 [2021-03-10 21:59:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:01,990 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 909 transitions. [2021-03-10 21:59:01,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,990 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 909 transitions. [2021-03-10 21:59:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:01,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:01,991 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:01,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2021-03-10 21:59:01,991 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash 936770204, now seen corresponding path program 71 times [2021-03-10 21:59:01,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:01,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998505537] [2021-03-10 21:59:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998505537] [2021-03-10 21:59:02,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:02,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:02,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525805007] [2021-03-10 21:59:02,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:02,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:02,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:02,033 INFO L87 Difference]: Start difference. First operand 292 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,150 INFO L93 Difference]: Finished difference Result 517 states and 1525 transitions. [2021-03-10 21:59:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,151 INFO L225 Difference]: With dead ends: 517 [2021-03-10 21:59:02,151 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 21:59:02,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:59:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 21:59:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 289. [2021-03-10 21:59:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1041666666666665) internal successors, (894), 288 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-03-10 21:59:02,155 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-03-10 21:59:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,155 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-03-10 21:59:02,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-03-10 21:59:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:02,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,156 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-03-10 21:59:02,156 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1977006002, now seen corresponding path program 72 times [2021-03-10 21:59:02,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724582410] [2021-03-10 21:59:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724582410] [2021-03-10 21:59:02,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:02,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:02,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432505916] [2021-03-10 21:59:02,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:02,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:02,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:02,200 INFO L87 Difference]: Start difference. First operand 289 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,301 INFO L93 Difference]: Finished difference Result 508 states and 1493 transitions. [2021-03-10 21:59:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:02,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,302 INFO L225 Difference]: With dead ends: 508 [2021-03-10 21:59:02,302 INFO L226 Difference]: Without dead ends: 508 [2021-03-10 21:59:02,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:59:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-03-10 21:59:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 285. [2021-03-10 21:59:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-03-10 21:59:02,306 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-03-10 21:59:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,306 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-03-10 21:59:02,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-03-10 21:59:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:02,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,307 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-03-10 21:59:02,307 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1821454276, now seen corresponding path program 69 times [2021-03-10 21:59:02,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679940485] [2021-03-10 21:59:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679940485] [2021-03-10 21:59:02,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:02,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:02,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281445845] [2021-03-10 21:59:02,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:02,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:02,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:02,335 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,411 INFO L93 Difference]: Finished difference Result 371 states and 1090 transitions. [2021-03-10 21:59:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:02,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,412 INFO L225 Difference]: With dead ends: 371 [2021-03-10 21:59:02,412 INFO L226 Difference]: Without dead ends: 365 [2021-03-10 21:59:02,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-03-10 21:59:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 287. [2021-03-10 21:59:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0839160839160837) internal successors, (882), 286 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 882 transitions. [2021-03-10 21:59:02,415 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 882 transitions. Word has length 18 [2021-03-10 21:59:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,415 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 882 transitions. [2021-03-10 21:59:02,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 882 transitions. [2021-03-10 21:59:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:02,416 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,416 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2021-03-10 21:59:02,416 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash 558089094, now seen corresponding path program 70 times [2021-03-10 21:59:02,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112073238] [2021-03-10 21:59:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112073238] [2021-03-10 21:59:02,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:02,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:02,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165224384] [2021-03-10 21:59:02,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:02,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:02,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:02,463 INFO L87 Difference]: Start difference. First operand 287 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,538 INFO L93 Difference]: Finished difference Result 371 states and 1096 transitions. [2021-03-10 21:59:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:02,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,539 INFO L225 Difference]: With dead ends: 371 [2021-03-10 21:59:02,539 INFO L226 Difference]: Without dead ends: 371 [2021-03-10 21:59:02,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:02,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-03-10 21:59:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 285. [2021-03-10 21:59:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-03-10 21:59:02,542 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-03-10 21:59:02,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,543 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-03-10 21:59:02,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,543 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-03-10 21:59:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:02,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,543 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2021-03-10 21:59:02,543 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash -770608326, now seen corresponding path program 71 times [2021-03-10 21:59:02,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290688854] [2021-03-10 21:59:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290688854] [2021-03-10 21:59:02,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:02,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:02,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298679505] [2021-03-10 21:59:02,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:02,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:02,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:02,574 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,645 INFO L93 Difference]: Finished difference Result 404 states and 1172 transitions. [2021-03-10 21:59:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,646 INFO L225 Difference]: With dead ends: 404 [2021-03-10 21:59:02,646 INFO L226 Difference]: Without dead ends: 404 [2021-03-10 21:59:02,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-03-10 21:59:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 283. [2021-03-10 21:59:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.0921985815602837) internal successors, (872), 282 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 872 transitions. [2021-03-10 21:59:02,650 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 872 transitions. Word has length 18 [2021-03-10 21:59:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,650 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 872 transitions. [2021-03-10 21:59:02,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 872 transitions. [2021-03-10 21:59:02,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:02,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,650 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2021-03-10 21:59:02,650 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1443851738, now seen corresponding path program 73 times [2021-03-10 21:59:02,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089636104] [2021-03-10 21:59:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089636104] [2021-03-10 21:59:02,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:02,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:02,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212038026] [2021-03-10 21:59:02,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:02,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:02,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:02,675 INFO L87 Difference]: Start difference. First operand 283 states and 872 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,759 INFO L93 Difference]: Finished difference Result 443 states and 1306 transitions. [2021-03-10 21:59:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,760 INFO L225 Difference]: With dead ends: 443 [2021-03-10 21:59:02,760 INFO L226 Difference]: Without dead ends: 443 [2021-03-10 21:59:02,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-03-10 21:59:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 282. [2021-03-10 21:59:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.088967971530249) internal successors, (868), 281 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 868 transitions. [2021-03-10 21:59:02,764 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 868 transitions. Word has length 18 [2021-03-10 21:59:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,764 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 868 transitions. [2021-03-10 21:59:02,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 868 transitions. [2021-03-10 21:59:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:02,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,764 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-03-10 21:59:02,764 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,765 INFO L82 PathProgramCache]: Analyzing trace with hash -270558368, now seen corresponding path program 74 times [2021-03-10 21:59:02,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796735162] [2021-03-10 21:59:02,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796735162] [2021-03-10 21:59:02,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:02,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:02,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023624594] [2021-03-10 21:59:02,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:02,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:02,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:02,793 INFO L87 Difference]: Start difference. First operand 282 states and 868 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,886 INFO L93 Difference]: Finished difference Result 485 states and 1413 transitions. [2021-03-10 21:59:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,887 INFO L225 Difference]: With dead ends: 485 [2021-03-10 21:59:02,887 INFO L226 Difference]: Without dead ends: 485 [2021-03-10 21:59:02,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-03-10 21:59:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 285. [2021-03-10 21:59:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.109154929577465) internal successors, (883), 284 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 883 transitions. [2021-03-10 21:59:02,891 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 883 transitions. Word has length 18 [2021-03-10 21:59:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,891 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 883 transitions. [2021-03-10 21:59:02,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 883 transitions. [2021-03-10 21:59:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:02,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,891 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-03-10 21:59:02,891 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1353779400, now seen corresponding path program 75 times [2021-03-10 21:59:02,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98442612] [2021-03-10 21:59:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98442612] [2021-03-10 21:59:02,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:02,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:02,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808339660] [2021-03-10 21:59:02,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:02,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:02,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:02,918 INFO L87 Difference]: Start difference. First operand 285 states and 883 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,994 INFO L93 Difference]: Finished difference Result 443 states and 1318 transitions. [2021-03-10 21:59:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:02,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,995 INFO L225 Difference]: With dead ends: 443 [2021-03-10 21:59:02,995 INFO L226 Difference]: Without dead ends: 443 [2021-03-10 21:59:02,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-03-10 21:59:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 279. [2021-03-10 21:59:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.079136690647482) internal successors, (856), 278 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 856 transitions. [2021-03-10 21:59:03,002 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 856 transitions. Word has length 18 [2021-03-10 21:59:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:03,002 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 856 transitions. [2021-03-10 21:59:03,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 856 transitions. [2021-03-10 21:59:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:03,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:03,002 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:03,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2021-03-10 21:59:03,002 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:03,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:03,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1960501272, now seen corresponding path program 76 times [2021-03-10 21:59:03,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:03,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641678707] [2021-03-10 21:59:03,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:03,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641678707] [2021-03-10 21:59:03,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:03,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:03,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735951084] [2021-03-10 21:59:03,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:03,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:03,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:03,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:03,033 INFO L87 Difference]: Start difference. First operand 279 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:03,118 INFO L93 Difference]: Finished difference Result 463 states and 1339 transitions. [2021-03-10 21:59:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:03,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:03,119 INFO L225 Difference]: With dead ends: 463 [2021-03-10 21:59:03,119 INFO L226 Difference]: Without dead ends: 463 [2021-03-10 21:59:03,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-10 21:59:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 280. [2021-03-10 21:59:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.075268817204301) internal successors, (858), 279 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 858 transitions. [2021-03-10 21:59:03,122 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 858 transitions. Word has length 18 [2021-03-10 21:59:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:03,122 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 858 transitions. [2021-03-10 21:59:03,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 858 transitions. [2021-03-10 21:59:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:03,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:03,123 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:03,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2021-03-10 21:59:03,123 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:03,123 INFO L82 PathProgramCache]: Analyzing trace with hash -336163504, now seen corresponding path program 77 times [2021-03-10 21:59:03,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:03,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696492594] [2021-03-10 21:59:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:03,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696492594] [2021-03-10 21:59:03,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:03,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:03,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368864104] [2021-03-10 21:59:03,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:03,159 INFO L87 Difference]: Start difference. First operand 280 states and 858 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:03,250 INFO L93 Difference]: Finished difference Result 466 states and 1345 transitions. [2021-03-10 21:59:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:03,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:03,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:03,251 INFO L225 Difference]: With dead ends: 466 [2021-03-10 21:59:03,251 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 21:59:03,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 21:59:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 277. [2021-03-10 21:59:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0543478260869565) internal successors, (843), 276 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 843 transitions. [2021-03-10 21:59:03,255 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 843 transitions. Word has length 18 [2021-03-10 21:59:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:03,255 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 843 transitions. [2021-03-10 21:59:03,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 843 transitions. [2021-03-10 21:59:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:03,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:03,256 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:03,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2021-03-10 21:59:03,256 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:03,256 INFO L82 PathProgramCache]: Analyzing trace with hash 704072294, now seen corresponding path program 78 times [2021-03-10 21:59:03,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:03,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835525020] [2021-03-10 21:59:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:03,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835525020] [2021-03-10 21:59:03,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:03,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:59:03,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244279748] [2021-03-10 21:59:03,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:03,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:03,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:03,279 INFO L87 Difference]: Start difference. First operand 277 states and 843 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:03,357 INFO L93 Difference]: Finished difference Result 415 states and 1214 transitions. [2021-03-10 21:59:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:03,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:03,358 INFO L225 Difference]: With dead ends: 415 [2021-03-10 21:59:03,358 INFO L226 Difference]: Without dead ends: 415 [2021-03-10 21:59:03,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:59:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-03-10 21:59:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 263. [2021-03-10 21:59:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.053435114503817) internal successors, (800), 262 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 800 transitions. [2021-03-10 21:59:03,361 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 800 transitions. Word has length 18 [2021-03-10 21:59:03,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:03,361 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 800 transitions. [2021-03-10 21:59:03,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 800 transitions. [2021-03-10 21:59:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:03,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:03,362 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:03,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2021-03-10 21:59:03,362 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:03,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:03,362 INFO L82 PathProgramCache]: Analyzing trace with hash 991123733, now seen corresponding path program 1 times [2021-03-10 21:59:03,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:03,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477859396] [2021-03-10 21:59:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:59:03,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477859396] [2021-03-10 21:59:03,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049383955] [2021-03-10 21:59:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:59:03,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:59:03,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:03,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:59:03,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991745862] [2021-03-10 21:59:03,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:59:03,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:59:03,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:59:03,496 INFO L87 Difference]: Start difference. First operand 263 states and 800 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:03,546 INFO L93 Difference]: Finished difference Result 474 states and 1387 transitions. [2021-03-10 21:59:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:59:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:03,547 INFO L225 Difference]: With dead ends: 474 [2021-03-10 21:59:03,547 INFO L226 Difference]: Without dead ends: 370 [2021-03-10 21:59:03,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:59:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-03-10 21:59:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 307. [2021-03-10 21:59:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0718954248366015) internal successors, (940), 306 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 940 transitions. [2021-03-10 21:59:03,551 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 940 transitions. Word has length 19 [2021-03-10 21:59:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:03,551 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 940 transitions. [2021-03-10 21:59:03,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 940 transitions. [2021-03-10 21:59:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:03,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:03,551 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:03,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-03-10 21:59:03,752 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:03,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1443659084, now seen corresponding path program 1 times [2021-03-10 21:59:03,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:03,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549127566] [2021-03-10 21:59:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:03,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549127566] [2021-03-10 21:59:03,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376802276] [2021-03-10 21:59:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:04,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:04,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:04,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:04,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:04,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:04,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:04,075 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:04,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:04,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:04,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792682156] [2021-03-10 21:59:04,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:04,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:04,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:04,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:04,131 INFO L87 Difference]: Start difference. First operand 307 states and 940 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:04,646 INFO L93 Difference]: Finished difference Result 475 states and 1332 transitions. [2021-03-10 21:59:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:04,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:04,647 INFO L225 Difference]: With dead ends: 475 [2021-03-10 21:59:04,647 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 21:59:04,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 21:59:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 317. [2021-03-10 21:59:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0569620253164556) internal successors, (966), 316 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 966 transitions. [2021-03-10 21:59:04,651 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 966 transitions. Word has length 19 [2021-03-10 21:59:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:04,651 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 966 transitions. [2021-03-10 21:59:04,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 966 transitions. [2021-03-10 21:59:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:04,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:04,652 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:04,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:04,852 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:04,852 INFO L82 PathProgramCache]: Analyzing trace with hash -979539610, now seen corresponding path program 2 times [2021-03-10 21:59:04,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:04,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630648600] [2021-03-10 21:59:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630648600] [2021-03-10 21:59:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721678425] [2021-03-10 21:59:04,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:04,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:04,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:04,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:05,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:05,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:05,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:05,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:05,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:05,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:05,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:05,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:05,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:05,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681940070] [2021-03-10 21:59:05,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:05,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:05,239 INFO L87 Difference]: Start difference. First operand 317 states and 966 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:05,718 INFO L93 Difference]: Finished difference Result 467 states and 1315 transitions. [2021-03-10 21:59:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:05,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:05,719 INFO L225 Difference]: With dead ends: 467 [2021-03-10 21:59:05,719 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 21:59:05,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 21:59:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 320. [2021-03-10 21:59:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.053291536050157) internal successors, (974), 319 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 974 transitions. [2021-03-10 21:59:05,723 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 974 transitions. Word has length 19 [2021-03-10 21:59:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:05,723 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 974 transitions. [2021-03-10 21:59:05,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 974 transitions. [2021-03-10 21:59:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:05,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:05,723 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:05,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:05,938 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:05,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1874989368, now seen corresponding path program 3 times [2021-03-10 21:59:05,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:05,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390758750] [2021-03-10 21:59:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:06,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390758750] [2021-03-10 21:59:06,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609154461] [2021-03-10 21:59:06,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:06,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:06,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:06,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:06,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:06,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:06,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:06,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:06,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:06,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:06,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:06,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:06,261 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:06,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:06,265 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:06,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:06,269 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:06,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:06,272 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:06,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:06,275 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:06,328 INFO L628 ElimStorePlain]: treesize reduction 25, result has 72.8 percent of original size [2021-03-10 21:59:06,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:06,329 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:345, output treesize:67 [2021-03-10 21:59:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:06,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:06,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:06,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259847196] [2021-03-10 21:59:06,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:06,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:06,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:06,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:06,428 INFO L87 Difference]: Start difference. First operand 320 states and 974 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:07,098 INFO L93 Difference]: Finished difference Result 517 states and 1429 transitions. [2021-03-10 21:59:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:59:07,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:07,099 INFO L225 Difference]: With dead ends: 517 [2021-03-10 21:59:07,099 INFO L226 Difference]: Without dead ends: 474 [2021-03-10 21:59:07,099 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-03-10 21:59:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 326. [2021-03-10 21:59:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0646153846153847) internal successors, (996), 325 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 996 transitions. [2021-03-10 21:59:07,103 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 996 transitions. Word has length 19 [2021-03-10 21:59:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:07,104 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 996 transitions. [2021-03-10 21:59:07,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 996 transitions. [2021-03-10 21:59:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:07,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:07,104 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:07,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:07,319 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:07,319 INFO L82 PathProgramCache]: Analyzing trace with hash 114551978, now seen corresponding path program 4 times [2021-03-10 21:59:07,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:07,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876316175] [2021-03-10 21:59:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:07,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876316175] [2021-03-10 21:59:07,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392031554] [2021-03-10 21:59:07,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:07,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:07,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:07,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:07,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:07,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:07,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:07,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:07,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:07,623 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:07,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:07,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:07,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199231258] [2021-03-10 21:59:07,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:07,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:07,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:07,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:07,684 INFO L87 Difference]: Start difference. First operand 326 states and 996 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:08,087 INFO L93 Difference]: Finished difference Result 436 states and 1246 transitions. [2021-03-10 21:59:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:08,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:08,088 INFO L225 Difference]: With dead ends: 436 [2021-03-10 21:59:08,088 INFO L226 Difference]: Without dead ends: 407 [2021-03-10 21:59:08,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 462.7ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-03-10 21:59:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 332. [2021-03-10 21:59:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.0574018126888216) internal successors, (1012), 331 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1012 transitions. [2021-03-10 21:59:08,091 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1012 transitions. Word has length 19 [2021-03-10 21:59:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:08,092 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 1012 transitions. [2021-03-10 21:59:08,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1012 transitions. [2021-03-10 21:59:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:08,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:08,092 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:08,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-03-10 21:59:08,293 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1325886340, now seen corresponding path program 5 times [2021-03-10 21:59:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:08,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166942292] [2021-03-10 21:59:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:08,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166942292] [2021-03-10 21:59:08,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445931411] [2021-03-10 21:59:08,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:08,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:08,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:08,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:08,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:08,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:08,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:08,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:08,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:08,612 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:08,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:08,619 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:08,622 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:08,626 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:08,630 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:08,634 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:08,637 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:08,694 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-03-10 21:59:08,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:08,695 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 21:59:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:08,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:08,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:08,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286234926] [2021-03-10 21:59:08,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:08,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:08,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:08,799 INFO L87 Difference]: Start difference. First operand 332 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:09,304 INFO L93 Difference]: Finished difference Result 486 states and 1360 transitions. [2021-03-10 21:59:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:09,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:09,305 INFO L225 Difference]: With dead ends: 486 [2021-03-10 21:59:09,305 INFO L226 Difference]: Without dead ends: 443 [2021-03-10 21:59:09,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 563.3ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:59:09,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-03-10 21:59:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 329. [2021-03-10 21:59:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0609756097560976) internal successors, (1004), 328 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1004 transitions. [2021-03-10 21:59:09,309 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1004 transitions. Word has length 19 [2021-03-10 21:59:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:09,309 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 1004 transitions. [2021-03-10 21:59:09,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1004 transitions. [2021-03-10 21:59:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:09,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:09,309 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:09,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-03-10 21:59:09,510 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash 822910196, now seen corresponding path program 6 times [2021-03-10 21:59:09,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:09,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064797086] [2021-03-10 21:59:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:09,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064797086] [2021-03-10 21:59:09,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959251299] [2021-03-10 21:59:09,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:09,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:59:09,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:09,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:09,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:09,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:09,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:09,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:09,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:09,762 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:09,765 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:09,769 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:09,772 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,826 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-03-10 21:59:09,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:09,827 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 21:59:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:09,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:09,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 21:59:09,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794782304] [2021-03-10 21:59:09,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:59:09,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:59:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:59:09,926 INFO L87 Difference]: Start difference. First operand 329 states and 1004 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:10,479 INFO L93 Difference]: Finished difference Result 504 states and 1414 transitions. [2021-03-10 21:59:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:59:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:10,480 INFO L225 Difference]: With dead ends: 504 [2021-03-10 21:59:10,480 INFO L226 Difference]: Without dead ends: 461 [2021-03-10 21:59:10,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 618.5ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:59:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-03-10 21:59:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 344. [2021-03-10 21:59:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.061224489795918) internal successors, (1050), 343 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1050 transitions. [2021-03-10 21:59:10,484 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1050 transitions. Word has length 19 [2021-03-10 21:59:10,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:10,484 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1050 transitions. [2021-03-10 21:59:10,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1050 transitions. [2021-03-10 21:59:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:10,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:10,485 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:10,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:10,685 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash -771246302, now seen corresponding path program 7 times [2021-03-10 21:59:10,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:10,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102667224] [2021-03-10 21:59:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:10,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102667224] [2021-03-10 21:59:10,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764232424] [2021-03-10 21:59:10,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:10,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:10,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:10,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:10,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:10,952 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:10,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:10,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:10,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794661129] [2021-03-10 21:59:10,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:10,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:10,999 INFO L87 Difference]: Start difference. First operand 344 states and 1050 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:11,389 INFO L93 Difference]: Finished difference Result 458 states and 1310 transitions. [2021-03-10 21:59:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:11,390 INFO L225 Difference]: With dead ends: 458 [2021-03-10 21:59:11,390 INFO L226 Difference]: Without dead ends: 429 [2021-03-10 21:59:11,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-03-10 21:59:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 353. [2021-03-10 21:59:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.0511363636363638) internal successors, (1074), 352 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1074 transitions. [2021-03-10 21:59:11,394 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1074 transitions. Word has length 19 [2021-03-10 21:59:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:11,394 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1074 transitions. [2021-03-10 21:59:11,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1074 transitions. [2021-03-10 21:59:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:11,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:11,395 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:11,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2021-03-10 21:59:11,595 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:11,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2083282676, now seen corresponding path program 8 times [2021-03-10 21:59:11,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:11,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14758319] [2021-03-10 21:59:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:11,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14758319] [2021-03-10 21:59:11,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983076445] [2021-03-10 21:59:11,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:11,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:11,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:11,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:11,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:11,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:11,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:11,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:11,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:11,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:11,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:11,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:11,858 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:11,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:11,865 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:11,868 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:11,871 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:11,874 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:11,928 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-03-10 21:59:11,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:11,929 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 21:59:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:12,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:12,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:12,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508945970] [2021-03-10 21:59:12,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:12,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:12,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:12,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:12,034 INFO L87 Difference]: Start difference. First operand 353 states and 1074 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:12,584 INFO L93 Difference]: Finished difference Result 491 states and 1391 transitions. [2021-03-10 21:59:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:12,585 INFO L225 Difference]: With dead ends: 491 [2021-03-10 21:59:12,585 INFO L226 Difference]: Without dead ends: 441 [2021-03-10 21:59:12,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:59:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-03-10 21:59:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 356. [2021-03-10 21:59:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.047887323943662) internal successors, (1082), 355 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1082 transitions. [2021-03-10 21:59:12,589 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1082 transitions. Word has length 19 [2021-03-10 21:59:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:12,589 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1082 transitions. [2021-03-10 21:59:12,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1082 transitions. [2021-03-10 21:59:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:12,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:12,590 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:12,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-03-10 21:59:12,803 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash -62888084, now seen corresponding path program 9 times [2021-03-10 21:59:12,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:12,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112016813] [2021-03-10 21:59:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:12,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112016813] [2021-03-10 21:59:12,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295506032] [2021-03-10 21:59:12,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:12,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:59:12,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:13,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:13,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:13,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:13,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:13,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:13,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:13,091 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:13,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:13,096 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:13,099 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:13,103 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:13,106 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:13,109 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:13,112 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:13,167 INFO L628 ElimStorePlain]: treesize reduction 75, result has 47.2 percent of original size [2021-03-10 21:59:13,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:13,168 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:510, output treesize:67 [2021-03-10 21:59:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:13,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:13,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:13,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073613340] [2021-03-10 21:59:13,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:13,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:13,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:13,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:13,270 INFO L87 Difference]: Start difference. First operand 356 states and 1082 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:13,946 INFO L93 Difference]: Finished difference Result 556 states and 1538 transitions. [2021-03-10 21:59:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:13,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:13,947 INFO L225 Difference]: With dead ends: 556 [2021-03-10 21:59:13,947 INFO L226 Difference]: Without dead ends: 528 [2021-03-10 21:59:13,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 753.9ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:59:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-03-10 21:59:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 362. [2021-03-10 21:59:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0498614958448753) internal successors, (1101), 361 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1101 transitions. [2021-03-10 21:59:13,952 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1101 transitions. Word has length 19 [2021-03-10 21:59:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:13,952 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1101 transitions. [2021-03-10 21:59:13,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1101 transitions. [2021-03-10 21:59:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:13,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:13,952 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:14,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-03-10 21:59:14,153 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1075580616, now seen corresponding path program 10 times [2021-03-10 21:59:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:14,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058898449] [2021-03-10 21:59:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:14,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058898449] [2021-03-10 21:59:14,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289722146] [2021-03-10 21:59:14,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:14,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:14,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:14,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:14,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:14,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:14,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:14,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:14,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:14,493 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:14,496 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:14,500 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:14,503 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:14,506 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:14,510 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:14,513 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:14,516 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,571 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-03-10 21:59:14,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:14,572 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 21:59:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:14,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:14,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:14,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097722941] [2021-03-10 21:59:14,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:14,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:14,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:14,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:14,669 INFO L87 Difference]: Start difference. First operand 362 states and 1101 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:15,724 INFO L93 Difference]: Finished difference Result 665 states and 1827 transitions. [2021-03-10 21:59:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:59:15,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:15,725 INFO L225 Difference]: With dead ends: 665 [2021-03-10 21:59:15,725 INFO L226 Difference]: Without dead ends: 615 [2021-03-10 21:59:15,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1175.4ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:59:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-03-10 21:59:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 380. [2021-03-10 21:59:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.055408970976253) internal successors, (1158), 379 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1158 transitions. [2021-03-10 21:59:15,730 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1158 transitions. Word has length 19 [2021-03-10 21:59:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:15,730 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1158 transitions. [2021-03-10 21:59:15,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1158 transitions. [2021-03-10 21:59:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:15,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:15,731 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:15,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-03-10 21:59:15,931 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:15,932 INFO L82 PathProgramCache]: Analyzing trace with hash -304728262, now seen corresponding path program 11 times [2021-03-10 21:59:15,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:15,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962142701] [2021-03-10 21:59:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:16,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962142701] [2021-03-10 21:59:16,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83241613] [2021-03-10 21:59:16,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:16,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:16,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:16,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:16,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:16,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:16,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:16,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:16,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:16,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:16,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:16,238 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:16,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:16,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:16,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201897633] [2021-03-10 21:59:16,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:16,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:16,288 INFO L87 Difference]: Start difference. First operand 380 states and 1158 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:16,845 INFO L93 Difference]: Finished difference Result 646 states and 1806 transitions. [2021-03-10 21:59:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:16,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:16,846 INFO L225 Difference]: With dead ends: 646 [2021-03-10 21:59:16,846 INFO L226 Difference]: Without dead ends: 606 [2021-03-10 21:59:16,846 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:59:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-03-10 21:59:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 392. [2021-03-10 21:59:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.053708439897698) internal successors, (1194), 391 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1194 transitions. [2021-03-10 21:59:16,851 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1194 transitions. Word has length 19 [2021-03-10 21:59:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:16,851 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1194 transitions. [2021-03-10 21:59:16,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1194 transitions. [2021-03-10 21:59:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:16,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:16,851 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:17,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:17,052 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash 159391212, now seen corresponding path program 12 times [2021-03-10 21:59:17,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:17,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131370666] [2021-03-10 21:59:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:17,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131370666] [2021-03-10 21:59:17,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463392965] [2021-03-10 21:59:17,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:17,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:17,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:17,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:17,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:17,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:17,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:17,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:17,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:17,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929911071] [2021-03-10 21:59:17,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:17,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:17,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:17,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:17,447 INFO L87 Difference]: Start difference. First operand 392 states and 1194 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:18,059 INFO L93 Difference]: Finished difference Result 638 states and 1789 transitions. [2021-03-10 21:59:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:18,060 INFO L225 Difference]: With dead ends: 638 [2021-03-10 21:59:18,060 INFO L226 Difference]: Without dead ends: 609 [2021-03-10 21:59:18,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 697.9ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:59:18,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-10 21:59:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 395. [2021-03-10 21:59:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.050761421319797) internal successors, (1202), 394 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1202 transitions. [2021-03-10 21:59:18,065 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1202 transitions. Word has length 19 [2021-03-10 21:59:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:18,065 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 1202 transitions. [2021-03-10 21:59:18,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1202 transitions. [2021-03-10 21:59:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:18,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:18,066 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:18,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:18,267 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:18,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1281047106, now seen corresponding path program 13 times [2021-03-10 21:59:18,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:18,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824212813] [2021-03-10 21:59:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:18,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824212813] [2021-03-10 21:59:18,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512215929] [2021-03-10 21:59:18,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:59:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:18,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:18,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:18,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:18,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:18,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:18,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:18,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:18,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:18,617 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:18,620 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:18,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:18,626 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,678 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-03-10 21:59:18,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:18,679 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 21:59:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:18,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:18,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:18,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210082296] [2021-03-10 21:59:18,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:18,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:18,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:18,779 INFO L87 Difference]: Start difference. First operand 395 states and 1202 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:19,458 INFO L93 Difference]: Finished difference Result 649 states and 1831 transitions. [2021-03-10 21:59:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:59:19,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:19,459 INFO L225 Difference]: With dead ends: 649 [2021-03-10 21:59:19,459 INFO L226 Difference]: Without dead ends: 621 [2021-03-10 21:59:19,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 771.0ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-03-10 21:59:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 395. [2021-03-10 21:59:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.050761421319797) internal successors, (1202), 394 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1202 transitions. [2021-03-10 21:59:19,464 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1202 transitions. Word has length 19 [2021-03-10 21:59:19,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:19,464 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 1202 transitions. [2021-03-10 21:59:19,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1202 transitions. [2021-03-10 21:59:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:19,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:19,464 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:19,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:19,665 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:19,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1253482800, now seen corresponding path program 14 times [2021-03-10 21:59:19,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:19,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387269474] [2021-03-10 21:59:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:19,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387269474] [2021-03-10 21:59:19,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987586528] [2021-03-10 21:59:19,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:19,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:19,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:19,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:19,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:19,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:19,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:19,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:19,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:19,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:20,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:20,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:20,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308067381] [2021-03-10 21:59:20,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:20,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:20,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:20,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:20,022 INFO L87 Difference]: Start difference. First operand 395 states and 1202 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:20,580 INFO L93 Difference]: Finished difference Result 614 states and 1730 transitions. [2021-03-10 21:59:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:59:20,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:20,581 INFO L225 Difference]: With dead ends: 614 [2021-03-10 21:59:20,581 INFO L226 Difference]: Without dead ends: 585 [2021-03-10 21:59:20,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 608.6ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-03-10 21:59:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 401. [2021-03-10 21:59:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.045) internal successors, (1218), 400 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1218 transitions. [2021-03-10 21:59:20,585 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1218 transitions. Word has length 19 [2021-03-10 21:59:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:20,585 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 1218 transitions. [2021-03-10 21:59:20,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:20,586 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1218 transitions. [2021-03-10 21:59:20,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:20,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:20,586 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:20,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-03-10 21:59:20,787 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:20,787 INFO L82 PathProgramCache]: Analyzing trace with hash -186955518, now seen corresponding path program 15 times [2021-03-10 21:59:20,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:20,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104938275] [2021-03-10 21:59:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:20,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104938275] [2021-03-10 21:59:20,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370858940] [2021-03-10 21:59:20,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:20,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:20,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:21,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:21,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:21,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:21,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:21,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:21,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:21,075 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:21,080 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:21,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:21,086 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,140 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 21:59:21,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:21,141 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 21:59:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:21,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:21,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:21,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950434140] [2021-03-10 21:59:21,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:21,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:21,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:21,250 INFO L87 Difference]: Start difference. First operand 401 states and 1218 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:22,010 INFO L93 Difference]: Finished difference Result 676 states and 1878 transitions. [2021-03-10 21:59:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:22,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:22,011 INFO L225 Difference]: With dead ends: 676 [2021-03-10 21:59:22,011 INFO L226 Difference]: Without dead ends: 626 [2021-03-10 21:59:22,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 776.2ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:59:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-03-10 21:59:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 398. [2021-03-10 21:59:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.047858942065491) internal successors, (1210), 397 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1210 transitions. [2021-03-10 21:59:22,016 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1210 transitions. Word has length 19 [2021-03-10 21:59:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:22,016 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1210 transitions. [2021-03-10 21:59:22,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1210 transitions. [2021-03-10 21:59:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:22,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:22,017 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:22,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:22,217 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:22,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:22,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1961841018, now seen corresponding path program 16 times [2021-03-10 21:59:22,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:22,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95513788] [2021-03-10 21:59:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:22,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95513788] [2021-03-10 21:59:22,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007425061] [2021-03-10 21:59:22,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:59:22,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:22,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:22,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:22,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:22,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:22,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:22,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:22,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:22,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:22,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:22,519 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:22,523 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:22,527 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:22,530 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:22,534 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:22,537 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,612 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-03-10 21:59:22,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:22,613 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 21:59:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:22,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:22,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:59:22,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833840061] [2021-03-10 21:59:22,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:22,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:22,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:22,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:22,714 INFO L87 Difference]: Start difference. First operand 398 states and 1210 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:23,245 INFO L93 Difference]: Finished difference Result 603 states and 1708 transitions. [2021-03-10 21:59:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:23,247 INFO L225 Difference]: With dead ends: 603 [2021-03-10 21:59:23,247 INFO L226 Difference]: Without dead ends: 560 [2021-03-10 21:59:23,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:59:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-03-10 21:59:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 407. [2021-03-10 21:59:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.061576354679803) internal successors, (1243), 406 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1243 transitions. [2021-03-10 21:59:23,251 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1243 transitions. Word has length 19 [2021-03-10 21:59:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:23,251 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 1243 transitions. [2021-03-10 21:59:23,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1243 transitions. [2021-03-10 21:59:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:23,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:23,252 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:23,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:23,452 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:23,453 INFO L82 PathProgramCache]: Analyzing trace with hash 236586928, now seen corresponding path program 17 times [2021-03-10 21:59:23,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:23,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38573790] [2021-03-10 21:59:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:23,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38573790] [2021-03-10 21:59:23,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984886474] [2021-03-10 21:59:23,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:23,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:23,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:23,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:23,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:23,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:23,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:23,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:23,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:23,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:23,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:23,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:23,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802241310] [2021-03-10 21:59:23,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:23,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:23,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:23,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:23,858 INFO L87 Difference]: Start difference. First operand 407 states and 1243 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:24,430 INFO L93 Difference]: Finished difference Result 706 states and 1985 transitions. [2021-03-10 21:59:24,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:24,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:24,431 INFO L225 Difference]: With dead ends: 706 [2021-03-10 21:59:24,431 INFO L226 Difference]: Without dead ends: 666 [2021-03-10 21:59:24,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:59:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-03-10 21:59:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 414. [2021-03-10 21:59:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.0653753026634383) internal successors, (1266), 413 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1266 transitions. [2021-03-10 21:59:24,437 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1266 transitions. Word has length 19 [2021-03-10 21:59:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:24,437 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 1266 transitions. [2021-03-10 21:59:24,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:24,437 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1266 transitions. [2021-03-10 21:59:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:24,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:24,437 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:24,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:24,638 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:24,638 INFO L82 PathProgramCache]: Analyzing trace with hash 700706402, now seen corresponding path program 18 times [2021-03-10 21:59:24,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:24,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856733126] [2021-03-10 21:59:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:24,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856733126] [2021-03-10 21:59:24,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34781747] [2021-03-10 21:59:24,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:24,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:24,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:24,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:24,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:25,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:25,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:25,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:25,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:25,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:25,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:25,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:25,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:25,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:25,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767294281] [2021-03-10 21:59:25,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:25,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:25,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:25,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:25,105 INFO L87 Difference]: Start difference. First operand 414 states and 1266 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:25,592 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-03-10 21:59:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:25,838 INFO L93 Difference]: Finished difference Result 674 states and 1920 transitions. [2021-03-10 21:59:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:25,839 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:25,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:25,840 INFO L225 Difference]: With dead ends: 674 [2021-03-10 21:59:25,840 INFO L226 Difference]: Without dead ends: 645 [2021-03-10 21:59:25,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 854.7ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:59:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-03-10 21:59:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 417. [2021-03-10 21:59:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.0625) internal successors, (1274), 416 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1274 transitions. [2021-03-10 21:59:25,845 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1274 transitions. Word has length 19 [2021-03-10 21:59:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:25,845 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 1274 transitions. [2021-03-10 21:59:25,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1274 transitions. [2021-03-10 21:59:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:25,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:25,845 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:26,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:26,055 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:26,056 INFO L82 PathProgramCache]: Analyzing trace with hash -739731916, now seen corresponding path program 19 times [2021-03-10 21:59:26,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:26,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896152796] [2021-03-10 21:59:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:26,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896152796] [2021-03-10 21:59:26,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959201712] [2021-03-10 21:59:26,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:26,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:26,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:26,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:26,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:26,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:26,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:26,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:26,440 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:26,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:26,451 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:26,454 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:26,457 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,507 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 21:59:26,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:26,508 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:343, output treesize:67 [2021-03-10 21:59:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:26,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:26,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:26,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124237949] [2021-03-10 21:59:26,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:26,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:26,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:26,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:26,607 INFO L87 Difference]: Start difference. First operand 417 states and 1274 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:27,340 INFO L93 Difference]: Finished difference Result 731 states and 2056 transitions. [2021-03-10 21:59:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:27,342 INFO L225 Difference]: With dead ends: 731 [2021-03-10 21:59:27,342 INFO L226 Difference]: Without dead ends: 688 [2021-03-10 21:59:27,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 876.3ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-03-10 21:59:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 431. [2021-03-10 21:59:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0348837209302326) internal successors, (1305), 430 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1305 transitions. [2021-03-10 21:59:27,347 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1305 transitions. Word has length 19 [2021-03-10 21:59:27,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:27,348 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1305 transitions. [2021-03-10 21:59:27,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1305 transitions. [2021-03-10 21:59:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:27,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:27,348 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:27,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-03-10 21:59:27,549 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash -678427472, now seen corresponding path program 20 times [2021-03-10 21:59:27,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:27,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695686276] [2021-03-10 21:59:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:27,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695686276] [2021-03-10 21:59:27,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255260330] [2021-03-10 21:59:27,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:27,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:27,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:27,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:27,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:27,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:27,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:27,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:27,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:27,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:27,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:27,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:27,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:27,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:27,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203000253] [2021-03-10 21:59:27,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:27,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:27,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:27,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:27,971 INFO L87 Difference]: Start difference. First operand 431 states and 1305 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:28,233 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 21:59:28,418 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-03-10 21:59:28,660 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-03-10 21:59:28,804 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2021-03-10 21:59:29,002 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-03-10 21:59:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:29,018 INFO L93 Difference]: Finished difference Result 629 states and 1806 transitions. [2021-03-10 21:59:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:29,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:29,019 INFO L225 Difference]: With dead ends: 629 [2021-03-10 21:59:29,019 INFO L226 Difference]: Without dead ends: 600 [2021-03-10 21:59:29,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1139.1ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:59:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-03-10 21:59:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 433. [2021-03-10 21:59:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.037037037037037) internal successors, (1312), 432 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1312 transitions. [2021-03-10 21:59:29,024 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1312 transitions. Word has length 19 [2021-03-10 21:59:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:29,024 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 1312 transitions. [2021-03-10 21:59:29,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1312 transitions. [2021-03-10 21:59:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:29,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:29,025 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:29,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:29,225 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1445273620, now seen corresponding path program 21 times [2021-03-10 21:59:29,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:29,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974145068] [2021-03-10 21:59:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974145068] [2021-03-10 21:59:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232886513] [2021-03-10 21:59:29,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:29,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:29,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:29,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:29,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:29,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:29,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:29,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:29,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:29,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:29,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:29,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:29,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:29,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:29,653 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:29,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:29,655 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:29,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:29,658 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:29,716 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 21:59:29,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:29,717 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 21:59:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:29,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:29,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:29,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888082455] [2021-03-10 21:59:29,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:29,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:29,814 INFO L87 Difference]: Start difference. First operand 433 states and 1312 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:30,173 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-03-10 21:59:30,356 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-03-10 21:59:30,586 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-03-10 21:59:30,761 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-03-10 21:59:30,953 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-03-10 21:59:31,150 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-03-10 21:59:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:31,172 INFO L93 Difference]: Finished difference Result 687 states and 1933 transitions. [2021-03-10 21:59:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:31,173 INFO L225 Difference]: With dead ends: 687 [2021-03-10 21:59:31,173 INFO L226 Difference]: Without dead ends: 643 [2021-03-10 21:59:31,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1515.3ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-03-10 21:59:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 431. [2021-03-10 21:59:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0348837209302326) internal successors, (1305), 430 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1305 transitions. [2021-03-10 21:59:31,179 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1305 transitions. Word has length 19 [2021-03-10 21:59:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:31,179 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1305 transitions. [2021-03-10 21:59:31,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1305 transitions. [2021-03-10 21:59:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:31,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:31,179 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:31,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-03-10 21:59:31,380 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:31,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1969462800, now seen corresponding path program 22 times [2021-03-10 21:59:31,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:31,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466544907] [2021-03-10 21:59:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:31,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466544907] [2021-03-10 21:59:31,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220473890] [2021-03-10 21:59:31,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:31,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:31,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:31,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:31,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:31,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:31,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:31,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:31,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:31,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:31,753 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:31,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:31,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:31,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767227526] [2021-03-10 21:59:31,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:31,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:31,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:31,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:31,798 INFO L87 Difference]: Start difference. First operand 431 states and 1305 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:32,211 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 21:59:32,339 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-10 21:59:32,532 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-10 21:59:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:32,931 INFO L93 Difference]: Finished difference Result 649 states and 1867 transitions. [2021-03-10 21:59:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:59:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:32,933 INFO L225 Difference]: With dead ends: 649 [2021-03-10 21:59:32,933 INFO L226 Difference]: Without dead ends: 620 [2021-03-10 21:59:32,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1189.5ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-03-10 21:59:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 435. [2021-03-10 21:59:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.0391705069124426) internal successors, (1319), 434 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1319 transitions. [2021-03-10 21:59:32,938 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1319 transitions. Word has length 19 [2021-03-10 21:59:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:32,938 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 1319 transitions. [2021-03-10 21:59:32,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1319 transitions. [2021-03-10 21:59:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:32,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:32,939 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:33,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:33,139 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:33,140 INFO L82 PathProgramCache]: Analyzing trace with hash 885066178, now seen corresponding path program 23 times [2021-03-10 21:59:33,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:33,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539738250] [2021-03-10 21:59:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:33,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539738250] [2021-03-10 21:59:33,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981766488] [2021-03-10 21:59:33,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:33,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:33,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:33,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:33,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:33,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:33,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:33,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:33,550 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:33,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:33,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:33,559 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:33,562 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,613 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 21:59:33,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:33,614 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 21:59:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:33,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:33,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:33,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184111849] [2021-03-10 21:59:33,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:33,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:33,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:33,765 INFO L87 Difference]: Start difference. First operand 435 states and 1319 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:34,678 INFO L93 Difference]: Finished difference Result 713 states and 2018 transitions. [2021-03-10 21:59:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:34,679 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:34,679 INFO L225 Difference]: With dead ends: 713 [2021-03-10 21:59:34,679 INFO L226 Difference]: Without dead ends: 663 [2021-03-10 21:59:34,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1081.6ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-10 21:59:34,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 434. [2021-03-10 21:59:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.048498845265589) internal successors, (1320), 433 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1320 transitions. [2021-03-10 21:59:34,685 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1320 transitions. Word has length 19 [2021-03-10 21:59:34,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:34,685 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 1320 transitions. [2021-03-10 21:59:34,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:34,685 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1320 transitions. [2021-03-10 21:59:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:34,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:34,685 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:34,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:34,886 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash -786696720, now seen corresponding path program 24 times [2021-03-10 21:59:34,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:34,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703252509] [2021-03-10 21:59:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:35,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703252509] [2021-03-10 21:59:35,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332682699] [2021-03-10 21:59:35,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:35,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:35,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:35,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:35,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:35,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:35,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:35,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:35,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:35,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:35,301 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:35,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,362 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 21:59:35,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:35,363 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-03-10 21:59:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:35,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:35,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:35,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541666756] [2021-03-10 21:59:35,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:35,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:35,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:35,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:35,461 INFO L87 Difference]: Start difference. First operand 434 states and 1320 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,919 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-03-10 21:59:36,085 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-03-10 21:59:36,205 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-10 21:59:36,442 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-03-10 21:59:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:36,466 INFO L93 Difference]: Finished difference Result 711 states and 2001 transitions. [2021-03-10 21:59:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:36,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:36,468 INFO L225 Difference]: With dead ends: 711 [2021-03-10 21:59:36,468 INFO L226 Difference]: Without dead ends: 667 [2021-03-10 21:59:36,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1162.1ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-03-10 21:59:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 434. [2021-03-10 21:59:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.048498845265589) internal successors, (1320), 433 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1320 transitions. [2021-03-10 21:59:36,473 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1320 transitions. Word has length 19 [2021-03-10 21:59:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:36,473 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 1320 transitions. [2021-03-10 21:59:36,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1320 transitions. [2021-03-10 21:59:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:36,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:36,474 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:36,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-03-10 21:59:36,674 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:36,674 INFO L82 PathProgramCache]: Analyzing trace with hash 792680752, now seen corresponding path program 25 times [2021-03-10 21:59:36,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:36,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117349814] [2021-03-10 21:59:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:36,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117349814] [2021-03-10 21:59:36,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937312241] [2021-03-10 21:59:36,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:36,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:37,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:37,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:37,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:37,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:37,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:37,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:37,037 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-10 21:59:37,041 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:37,044 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:37,048 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:37,052 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:37,056 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:37,059 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:37,063 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:37,066 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:37,070 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:37,075 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:37,079 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:37,083 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:37,087 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:37,090 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,259 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 21:59:37,260 INFO L628 ElimStorePlain]: treesize reduction 68, result has 76.6 percent of original size [2021-03-10 21:59:37,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:59:37,261 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:863, output treesize:222 [2021-03-10 21:59:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:37,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:37,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:37,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935565958] [2021-03-10 21:59:37,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:37,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:37,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:37,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:37,473 INFO L87 Difference]: Start difference. First operand 434 states and 1320 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:37,853 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-03-10 21:59:38,103 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-03-10 21:59:38,248 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2021-03-10 21:59:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:38,411 INFO L93 Difference]: Finished difference Result 705 states and 2018 transitions. [2021-03-10 21:59:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:38,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:38,413 INFO L225 Difference]: With dead ends: 705 [2021-03-10 21:59:38,413 INFO L226 Difference]: Without dead ends: 677 [2021-03-10 21:59:38,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1121.5ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:59:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-03-10 21:59:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 439. [2021-03-10 21:59:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.0684931506849313) internal successors, (1344), 438 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1344 transitions. [2021-03-10 21:59:38,418 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1344 transitions. Word has length 19 [2021-03-10 21:59:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:38,418 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 1344 transitions. [2021-03-10 21:59:38,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1344 transitions. [2021-03-10 21:59:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:38,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:38,419 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:38,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:38,619 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2085023152, now seen corresponding path program 26 times [2021-03-10 21:59:38,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:38,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110312714] [2021-03-10 21:59:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:38,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110312714] [2021-03-10 21:59:38,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860548583] [2021-03-10 21:59:38,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:38,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:38,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:38,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:38,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:38,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:38,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:38,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:38,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:38,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:38,958 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:38,962 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:38,967 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:38,971 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:38,975 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:38,979 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:38,983 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:38,987 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:38,990 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:38,994 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:39,006 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:39,009 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:39,012 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:39,016 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:39,019 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:39,024 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:39,027 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:39,030 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:39,033 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:39,035 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,220 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 21:59:39,220 INFO L628 ElimStorePlain]: treesize reduction 72, result has 75.5 percent of original size [2021-03-10 21:59:39,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:59:39,222 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1063, output treesize:222 [2021-03-10 21:59:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:39,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:39,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:39,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265184504] [2021-03-10 21:59:39,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:39,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:39,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:39,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:39,477 INFO L87 Difference]: Start difference. First operand 439 states and 1344 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:39,924 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 21:59:40,067 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-03-10 21:59:40,270 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-03-10 21:59:40,660 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-03-10 21:59:41,067 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-03-10 21:59:41,426 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2021-03-10 21:59:41,773 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-03-10 21:59:41,945 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-10 21:59:42,200 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-03-10 21:59:42,388 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-03-10 21:59:42,728 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-03-10 21:59:42,980 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-03-10 21:59:43,104 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 21:59:43,336 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2021-03-10 21:59:43,478 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-03-10 21:59:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:43,643 INFO L93 Difference]: Finished difference Result 850 states and 2335 transitions. [2021-03-10 21:59:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:59:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:43,645 INFO L225 Difference]: With dead ends: 850 [2021-03-10 21:59:43,645 INFO L226 Difference]: Without dead ends: 792 [2021-03-10 21:59:43,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4171.8ms TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:59:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-03-10 21:59:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 444. [2021-03-10 21:59:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.0790067720090293) internal successors, (1364), 443 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1364 transitions. [2021-03-10 21:59:43,651 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1364 transitions. Word has length 19 [2021-03-10 21:59:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:43,651 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1364 transitions. [2021-03-10 21:59:43,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1364 transitions. [2021-03-10 21:59:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:43,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:43,652 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:43,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-03-10 21:59:43,852 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:43,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:43,852 INFO L82 PathProgramCache]: Analyzing trace with hash 82616162, now seen corresponding path program 27 times [2021-03-10 21:59:43,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:43,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907548941] [2021-03-10 21:59:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:43,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907548941] [2021-03-10 21:59:43,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250953234] [2021-03-10 21:59:43,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:43,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:43,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:43,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:44,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:44,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:44,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:44,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:44,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:44,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:44,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:44,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569053460] [2021-03-10 21:59:44,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:44,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:44,194 INFO L87 Difference]: Start difference. First operand 444 states and 1364 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:44,773 INFO L93 Difference]: Finished difference Result 649 states and 1859 transitions. [2021-03-10 21:59:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:59:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:44,774 INFO L225 Difference]: With dead ends: 649 [2021-03-10 21:59:44,774 INFO L226 Difference]: Without dead ends: 620 [2021-03-10 21:59:44,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-03-10 21:59:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 451. [2021-03-10 21:59:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.08) internal successors, (1386), 450 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1386 transitions. [2021-03-10 21:59:44,779 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1386 transitions. Word has length 19 [2021-03-10 21:59:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:44,779 INFO L480 AbstractCegarLoop]: Abstraction has 451 states and 1386 transitions. [2021-03-10 21:59:44,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1386 transitions. [2021-03-10 21:59:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:44,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:44,780 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:44,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-03-10 21:59:44,981 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:44,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1357822156, now seen corresponding path program 28 times [2021-03-10 21:59:44,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:44,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535032852] [2021-03-10 21:59:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:45,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535032852] [2021-03-10 21:59:45,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657008203] [2021-03-10 21:59:45,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:45,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:45,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:45,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:45,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:45,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:45,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:45,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:45,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:45,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:45,302 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:45,305 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:45,308 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:45,311 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:45,313 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,364 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 21:59:45,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:45,365 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:343, output treesize:67 [2021-03-10 21:59:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:45,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:45,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:45,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619749849] [2021-03-10 21:59:45,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:45,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:45,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:45,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:45,466 INFO L87 Difference]: Start difference. First operand 451 states and 1386 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:46,215 INFO L93 Difference]: Finished difference Result 682 states and 1940 transitions. [2021-03-10 21:59:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:59:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:46,216 INFO L225 Difference]: With dead ends: 682 [2021-03-10 21:59:46,216 INFO L226 Difference]: Without dead ends: 632 [2021-03-10 21:59:46,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 798.6ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:59:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-03-10 21:59:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 448. [2021-03-10 21:59:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.082774049217002) internal successors, (1378), 447 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1378 transitions. [2021-03-10 21:59:46,222 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1378 transitions. Word has length 19 [2021-03-10 21:59:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:46,222 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 1378 transitions. [2021-03-10 21:59:46,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1378 transitions. [2021-03-10 21:59:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:46,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:46,222 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:46,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:46,423 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:46,423 INFO L82 PathProgramCache]: Analyzing trace with hash 790974380, now seen corresponding path program 29 times [2021-03-10 21:59:46,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:46,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733945313] [2021-03-10 21:59:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:46,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733945313] [2021-03-10 21:59:46,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522671843] [2021-03-10 21:59:46,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:46,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:59:46,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:46,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:46,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:46,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:46,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:46,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:46,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:46,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:46,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:46,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:46,725 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:46,730 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:46,733 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,786 INFO L628 ElimStorePlain]: treesize reduction 58, result has 50.4 percent of original size [2021-03-10 21:59:46,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:46,787 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:313, output treesize:59 [2021-03-10 21:59:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:46,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:46,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:46,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038149729] [2021-03-10 21:59:46,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:46,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:46,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:46,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:46,891 INFO L87 Difference]: Start difference. First operand 448 states and 1378 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:47,597 INFO L93 Difference]: Finished difference Result 655 states and 1879 transitions. [2021-03-10 21:59:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:59:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:47,598 INFO L225 Difference]: With dead ends: 655 [2021-03-10 21:59:47,598 INFO L226 Difference]: Without dead ends: 612 [2021-03-10 21:59:47,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 750.3ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:47,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-10 21:59:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 445. [2021-03-10 21:59:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.0855855855855854) internal successors, (1370), 444 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1370 transitions. [2021-03-10 21:59:47,603 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1370 transitions. Word has length 19 [2021-03-10 21:59:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:47,603 INFO L480 AbstractCegarLoop]: Abstraction has 445 states and 1370 transitions. [2021-03-10 21:59:47,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1370 transitions. [2021-03-10 21:59:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:47,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:47,603 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:47,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:47,804 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:47,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1901193260, now seen corresponding path program 30 times [2021-03-10 21:59:47,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:47,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763838389] [2021-03-10 21:59:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:47,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763838389] [2021-03-10 21:59:47,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666474790] [2021-03-10 21:59:47,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:47,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:47,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:48,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:48,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:48,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:48,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:48,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:48,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:48,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 21:59:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:48,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:48,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:48,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712600855] [2021-03-10 21:59:48,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:48,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:48,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:48,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:48,197 INFO L87 Difference]: Start difference. First operand 445 states and 1370 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:48,768 INFO L93 Difference]: Finished difference Result 602 states and 1754 transitions. [2021-03-10 21:59:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:48,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:48,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:48,769 INFO L225 Difference]: With dead ends: 602 [2021-03-10 21:59:48,769 INFO L226 Difference]: Without dead ends: 573 [2021-03-10 21:59:48,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 665.6ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:59:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-03-10 21:59:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 449. [2021-03-10 21:59:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.0892857142857144) internal successors, (1384), 448 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1384 transitions. [2021-03-10 21:59:48,774 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1384 transitions. Word has length 19 [2021-03-10 21:59:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:48,774 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 1384 transitions. [2021-03-10 21:59:48,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1384 transitions. [2021-03-10 21:59:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:48,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:48,774 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:48,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:48,975 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:48,975 INFO L82 PathProgramCache]: Analyzing trace with hash 460754942, now seen corresponding path program 31 times [2021-03-10 21:59:48,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:48,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980110785] [2021-03-10 21:59:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:49,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980110785] [2021-03-10 21:59:49,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419549711] [2021-03-10 21:59:49,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:49,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:49,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:49,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:49,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:49,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:49,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:49,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:49,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:49,315 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:49,318 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:49,321 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:49,325 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:49,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:49,332 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:49,334 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,389 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-03-10 21:59:49,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:49,390 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 21:59:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:49,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:49,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:49,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169933637] [2021-03-10 21:59:49,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:49,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:49,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:49,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:49,483 INFO L87 Difference]: Start difference. First operand 449 states and 1384 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,836 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 21:59:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:50,274 INFO L93 Difference]: Finished difference Result 666 states and 1905 transitions. [2021-03-10 21:59:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:59:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:50,276 INFO L225 Difference]: With dead ends: 666 [2021-03-10 21:59:50,276 INFO L226 Difference]: Without dead ends: 616 [2021-03-10 21:59:50,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 891.7ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-03-10 21:59:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 448. [2021-03-10 21:59:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.098434004474273) internal successors, (1385), 447 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1385 transitions. [2021-03-10 21:59:50,281 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1385 transitions. Word has length 19 [2021-03-10 21:59:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:50,281 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 1385 transitions. [2021-03-10 21:59:50,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1385 transitions. [2021-03-10 21:59:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:50,281 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:50,281 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:50,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-03-10 21:59:50,482 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:50,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1211007956, now seen corresponding path program 32 times [2021-03-10 21:59:50,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:50,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904190576] [2021-03-10 21:59:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:50,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904190576] [2021-03-10 21:59:50,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202589608] [2021-03-10 21:59:50,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:50,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:50,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:50,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:50,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:50,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:50,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:50,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:50,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:50,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:50,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:50,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:50,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:50,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:50,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:50,841 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:50,905 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 21:59:50,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:50,906 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-03-10 21:59:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:51,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:51,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:51,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554980096] [2021-03-10 21:59:51,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:51,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:51,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:51,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:51,001 INFO L87 Difference]: Start difference. First operand 448 states and 1385 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:51,422 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-03-10 21:59:51,691 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 21:59:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:52,012 INFO L93 Difference]: Finished difference Result 668 states and 1958 transitions. [2021-03-10 21:59:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:59:52,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:52,013 INFO L225 Difference]: With dead ends: 668 [2021-03-10 21:59:52,013 INFO L226 Difference]: Without dead ends: 646 [2021-03-10 21:59:52,013 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1059.4ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:59:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-03-10 21:59:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 450. [2021-03-10 21:59:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.1002227171492205) internal successors, (1392), 449 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1392 transitions. [2021-03-10 21:59:52,019 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1392 transitions. Word has length 19 [2021-03-10 21:59:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:52,019 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 1392 transitions. [2021-03-10 21:59:52,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1392 transitions. [2021-03-10 21:59:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:52,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:52,019 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:52,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:52,234 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:52,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash 368369516, now seen corresponding path program 33 times [2021-03-10 21:59:52,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:52,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3515164] [2021-03-10 21:59:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:52,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3515164] [2021-03-10 21:59:52,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700937149] [2021-03-10 21:59:52,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:52,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:52,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:52,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:52,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:52,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:52,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:52,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:52,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:52,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:52,574 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:52,578 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:52,582 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:52,586 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:52,590 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:52,595 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:52,598 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:52,602 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:52,605 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:52,609 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:52,614 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:52,618 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:52,622 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:52,625 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,798 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:59:52,798 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 21:59:52,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:59:52,812 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 21:59:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:53,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:53,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:53,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514927981] [2021-03-10 21:59:53,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:53,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:53,022 INFO L87 Difference]: Start difference. First operand 450 states and 1392 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:53,589 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 21:59:53,791 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 21:59:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:54,458 INFO L93 Difference]: Finished difference Result 813 states and 2276 transitions. [2021-03-10 21:59:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:59:54,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:54,459 INFO L225 Difference]: With dead ends: 813 [2021-03-10 21:59:54,459 INFO L226 Difference]: Without dead ends: 770 [2021-03-10 21:59:54,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1550.4ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:59:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-03-10 21:59:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 456. [2021-03-10 21:59:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1252747252747253) internal successors, (1422), 455 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1422 transitions. [2021-03-10 21:59:54,466 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1422 transitions. Word has length 19 [2021-03-10 21:59:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:54,466 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 1422 transitions. [2021-03-10 21:59:54,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1422 transitions. [2021-03-10 21:59:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:54,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:54,466 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:54,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:54,667 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1660711916, now seen corresponding path program 34 times [2021-03-10 21:59:54,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:54,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022607975] [2021-03-10 21:59:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:54,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022607975] [2021-03-10 21:59:54,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89855767] [2021-03-10 21:59:54,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:54,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:54,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:54,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:54,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:54,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:54,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:54,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:54,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:55,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:55,006 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:55,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:55,014 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:55,019 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:55,023 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:55,027 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:55,031 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:55,035 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:55,039 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:55,042 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:55,046 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:55,050 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:55,054 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:55,057 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:55,060 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:55,064 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:55,068 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:55,071 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:55,075 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:55,078 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:55,259 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 21:59:55,259 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-03-10 21:59:55,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:59:55,261 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-03-10 21:59:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:55,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:55,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570676123] [2021-03-10 21:59:55,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:55,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:55,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:55,514 INFO L87 Difference]: Start difference. First operand 456 states and 1422 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:56,025 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 21:59:56,265 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 21:59:56,444 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 21:59:56,734 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 21:59:56,905 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 21:59:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:57,013 INFO L93 Difference]: Finished difference Result 636 states and 1859 transitions. [2021-03-10 21:59:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:59:57,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:57,014 INFO L225 Difference]: With dead ends: 636 [2021-03-10 21:59:57,014 INFO L226 Difference]: Without dead ends: 614 [2021-03-10 21:59:57,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1658.3ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:59:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-03-10 21:59:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 454. [2021-03-10 21:59:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.119205298013245) internal successors, (1413), 453 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1413 transitions. [2021-03-10 21:59:57,019 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1413 transitions. Word has length 19 [2021-03-10 21:59:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:57,020 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1413 transitions. [2021-03-10 21:59:57,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1413 transitions. [2021-03-10 21:59:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:57,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:57,020 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:57,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable746,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:57,221 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2072973826, now seen corresponding path program 35 times [2021-03-10 21:59:57,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:57,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595115837] [2021-03-10 21:59:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:57,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595115837] [2021-03-10 21:59:57,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042227872] [2021-03-10 21:59:57,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:57,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:59:57,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:57,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:57,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:57,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:57,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:57,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:57,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:57,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:57,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:57,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:57,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:57,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:57,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:57,570 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:57,573 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:57,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:57,576 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:57,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:57,584 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:57,639 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 21:59:57,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:57,640 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:337, output treesize:67 [2021-03-10 21:59:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:57,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:57,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:57,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075431823] [2021-03-10 21:59:57,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:57,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:57,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:57,733 INFO L87 Difference]: Start difference. First operand 454 states and 1413 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:58,320 INFO L93 Difference]: Finished difference Result 643 states and 1887 transitions. [2021-03-10 21:59:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:58,321 INFO L225 Difference]: With dead ends: 643 [2021-03-10 21:59:58,321 INFO L226 Difference]: Without dead ends: 600 [2021-03-10 21:59:58,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-03-10 21:59:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 463. [2021-03-10 21:59:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.132034632034632) internal successors, (1447), 462 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1447 transitions. [2021-03-10 21:59:58,326 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1447 transitions. Word has length 19 [2021-03-10 21:59:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:58,326 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 1447 transitions. [2021-03-10 21:59:58,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1447 transitions. [2021-03-10 21:59:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:58,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:58,327 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:58,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-03-10 21:59:58,528 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:58,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1321573388, now seen corresponding path program 36 times [2021-03-10 21:59:58,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:58,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181016583] [2021-03-10 21:59:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:58,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181016583] [2021-03-10 21:59:58,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033538750] [2021-03-10 21:59:58,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:58,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:59:58,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:58,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:58,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:58,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:58,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:58,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:58,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:58,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:58,896 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:58,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:58,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:58,909 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:58,913 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:58,918 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:58,922 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:58,927 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:58,931 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:58,934 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:58,938 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:58,942 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:58,946 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:58,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:58,949 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:59,150 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:59:59,151 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 21:59:59,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:59:59,153 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:763, output treesize:222 [2021-03-10 21:59:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:59,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:59,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:59:59,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355006393] [2021-03-10 21:59:59,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:59,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:59,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:59,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:59,376 INFO L87 Difference]: Start difference. First operand 463 states and 1447 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:00,035 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 22:00:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:00,458 INFO L93 Difference]: Finished difference Result 724 states and 2086 transitions. [2021-03-10 22:00:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:00,460 INFO L225 Difference]: With dead ends: 724 [2021-03-10 22:00:00,460 INFO L226 Difference]: Without dead ends: 681 [2021-03-10 22:00:00,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1247.6ms TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:00:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-03-10 22:00:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 466. [2021-03-10 22:00:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1440860215053763) internal successors, (1462), 465 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1462 transitions. [2021-03-10 22:00:00,465 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1462 transitions. Word has length 19 [2021-03-10 22:00:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:00,465 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 1462 transitions. [2021-03-10 22:00:00,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1462 transitions. [2021-03-10 22:00:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:00,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:00,466 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:00,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable784,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:00,668 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:00,669 INFO L82 PathProgramCache]: Analyzing trace with hash -29230988, now seen corresponding path program 37 times [2021-03-10 22:00:00,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:00,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022288215] [2021-03-10 22:00:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:00,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022288215] [2021-03-10 22:00:00,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11146240] [2021-03-10 22:00:00,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:00,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:00,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:00,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:00,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:00,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:00,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:00,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:00,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:00,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:00,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:00,993 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:00,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:00,997 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:01,001 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-10 22:00:01,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:01,009 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:01,013 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:01,016 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:01,034 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:01,038 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:01,042 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:01,046 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:01,050 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:01,054 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:01,058 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:01,062 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:01,066 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:01,069 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:01,073 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,253 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:00:01,254 INFO L628 ElimStorePlain]: treesize reduction 78, result has 74.0 percent of original size [2021-03-10 22:00:01,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:00:01,256 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:961, output treesize:222 [2021-03-10 22:00:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:01,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:01,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:01,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806189023] [2021-03-10 22:00:01,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:01,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:01,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:01,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:01,539 INFO L87 Difference]: Start difference. First operand 466 states and 1462 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:02,284 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 22:00:02,650 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 22:00:02,919 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 22:00:03,258 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-10 22:00:03,484 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-10 22:00:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:03,589 INFO L93 Difference]: Finished difference Result 651 states and 1923 transitions. [2021-03-10 22:00:03,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:00:03,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:03,595 INFO L225 Difference]: With dead ends: 651 [2021-03-10 22:00:03,596 INFO L226 Difference]: Without dead ends: 629 [2021-03-10 22:00:03,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2159.3ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:00:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-03-10 22:00:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 464. [2021-03-10 22:00:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.138228941684665) internal successors, (1453), 463 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1453 transitions. [2021-03-10 22:00:03,601 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1453 transitions. Word has length 19 [2021-03-10 22:00:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:03,601 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1453 transitions. [2021-03-10 22:00:03,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1453 transitions. [2021-03-10 22:00:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:03,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:03,602 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:03,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:03,817 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1586593584, now seen corresponding path program 38 times [2021-03-10 22:00:03,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:03,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784786666] [2021-03-10 22:00:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:03,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784786666] [2021-03-10 22:00:03,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966726744] [2021-03-10 22:00:03,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:03,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:03,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:03,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:03,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:04,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:04,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:04,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:04,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:04,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:04,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:04,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:00:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:04,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:04,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:04,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927532478] [2021-03-10 22:00:04,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:04,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:04,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:04,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:04,189 INFO L87 Difference]: Start difference. First operand 464 states and 1453 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:04,611 INFO L93 Difference]: Finished difference Result 626 states and 1855 transitions. [2021-03-10 22:00:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:04,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:04,612 INFO L225 Difference]: With dead ends: 626 [2021-03-10 22:00:04,612 INFO L226 Difference]: Without dead ends: 597 [2021-03-10 22:00:04,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 529.1ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-03-10 22:00:04,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 474. [2021-03-10 22:00:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1331923890063424) internal successors, (1482), 473 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1482 transitions. [2021-03-10 22:00:04,617 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1482 transitions. Word has length 19 [2021-03-10 22:00:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:04,617 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 1482 transitions. [2021-03-10 22:00:04,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1482 transitions. [2021-03-10 22:00:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:04,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:04,618 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:04,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable827 [2021-03-10 22:00:04,819 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:04,819 INFO L82 PathProgramCache]: Analyzing trace with hash 146155266, now seen corresponding path program 39 times [2021-03-10 22:00:04,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:04,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081869293] [2021-03-10 22:00:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:04,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081869293] [2021-03-10 22:00:04,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584496762] [2021-03-10 22:00:04,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:05,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:05,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:05,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:05,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:05,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:05,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:05,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:05,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:05,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:05,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:05,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:05,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:05,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:05,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:05,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:05,195 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:05,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:05,198 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:05,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:05,201 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:05,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:05,203 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:05,259 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 22:00:05,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:05,260 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:00:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:05,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:05,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:05,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905994647] [2021-03-10 22:00:05,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:05,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:05,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:05,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:05,349 INFO L87 Difference]: Start difference. First operand 474 states and 1482 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:05,937 INFO L93 Difference]: Finished difference Result 659 states and 1936 transitions. [2021-03-10 22:00:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:05,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:05,939 INFO L225 Difference]: With dead ends: 659 [2021-03-10 22:00:05,939 INFO L226 Difference]: Without dead ends: 609 [2021-03-10 22:00:05,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 715.0ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-10 22:00:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 471. [2021-03-10 22:00:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1361702127659576) internal successors, (1474), 470 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1474 transitions. [2021-03-10 22:00:05,944 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1474 transitions. Word has length 19 [2021-03-10 22:00:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:05,944 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 1474 transitions. [2021-03-10 22:00:05,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1474 transitions. [2021-03-10 22:00:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:05,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:05,944 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:06,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable839,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:06,167 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:06,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2000015494, now seen corresponding path program 40 times [2021-03-10 22:00:06,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:06,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99842290] [2021-03-10 22:00:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:06,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99842290] [2021-03-10 22:00:06,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962001136] [2021-03-10 22:00:06,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:06,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:06,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:06,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:06,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:06,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:06,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:06,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:06,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:06,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:06,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:06,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:06,504 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:06,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:06,509 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,563 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:00:06,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:06,564 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:333, output treesize:67 [2021-03-10 22:00:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:06,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:06,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:06,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785459762] [2021-03-10 22:00:06,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:06,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:06,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:06,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:06,665 INFO L87 Difference]: Start difference. First operand 471 states and 1474 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:07,383 INFO L93 Difference]: Finished difference Result 790 states and 2250 transitions. [2021-03-10 22:00:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:07,384 INFO L225 Difference]: With dead ends: 790 [2021-03-10 22:00:07,384 INFO L226 Difference]: Without dead ends: 747 [2021-03-10 22:00:07,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 799.4ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:00:07,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-03-10 22:00:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 468. [2021-03-10 22:00:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.139186295503212) internal successors, (1466), 467 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1466 transitions. [2021-03-10 22:00:07,390 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1466 transitions. Word has length 19 [2021-03-10 22:00:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:07,391 INFO L480 AbstractCegarLoop]: Abstraction has 468 states and 1466 transitions. [2021-03-10 22:00:07,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1466 transitions. [2021-03-10 22:00:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:07,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:07,391 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:07,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable857,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:07,607 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:07,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:07,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1282259270, now seen corresponding path program 41 times [2021-03-10 22:00:07,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:07,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758899133] [2021-03-10 22:00:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:07,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758899133] [2021-03-10 22:00:07,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137174327] [2021-03-10 22:00:07,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:07,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:07,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:07,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:07,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:07,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:07,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:07,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:07,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:07,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:07,953 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:07,956 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:07,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:07,963 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:07,983 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:07,986 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:07,989 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:08,046 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-03-10 22:00:08,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:08,047 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 22:00:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:08,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:08,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:00:08,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871113510] [2021-03-10 22:00:08,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:00:08,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:08,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:00:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:08,141 INFO L87 Difference]: Start difference. First operand 468 states and 1466 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:08,942 INFO L93 Difference]: Finished difference Result 804 states and 2314 transitions. [2021-03-10 22:00:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:00:08,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:08,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:08,944 INFO L225 Difference]: With dead ends: 804 [2021-03-10 22:00:08,944 INFO L226 Difference]: Without dead ends: 754 [2021-03-10 22:00:08,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 908.3ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:00:08,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-03-10 22:00:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 468. [2021-03-10 22:00:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.139186295503212) internal successors, (1466), 467 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1466 transitions. [2021-03-10 22:00:08,952 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1466 transitions. Word has length 19 [2021-03-10 22:00:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:08,952 INFO L480 AbstractCegarLoop]: Abstraction has 468 states and 1466 transitions. [2021-03-10 22:00:08,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1466 transitions. [2021-03-10 22:00:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:08,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:08,953 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:09,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-03-10 22:00:09,170 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash -454876694, now seen corresponding path program 42 times [2021-03-10 22:00:09,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:09,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138549634] [2021-03-10 22:00:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:09,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138549634] [2021-03-10 22:00:09,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876454718] [2021-03-10 22:00:09,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:09,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:09,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:09,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:09,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:09,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:09,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:09,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:09,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:09,515 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:00:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:09,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:09,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:09,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963050577] [2021-03-10 22:00:09,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:09,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:09,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:09,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:09,574 INFO L87 Difference]: Start difference. First operand 468 states and 1466 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:10,168 INFO L93 Difference]: Finished difference Result 619 states and 1841 transitions. [2021-03-10 22:00:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:10,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:10,170 INFO L225 Difference]: With dead ends: 619 [2021-03-10 22:00:10,170 INFO L226 Difference]: Without dead ends: 590 [2021-03-10 22:00:10,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:00:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-03-10 22:00:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 475. [2021-03-10 22:00:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1392405063291138) internal successors, (1488), 474 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1488 transitions. [2021-03-10 22:00:10,175 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1488 transitions. Word has length 19 [2021-03-10 22:00:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:10,175 INFO L480 AbstractCegarLoop]: Abstraction has 475 states and 1488 transitions. [2021-03-10 22:00:10,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1488 transitions. [2021-03-10 22:00:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:10,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:10,176 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:10,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-03-10 22:00:10,377 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:10,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1895315012, now seen corresponding path program 43 times [2021-03-10 22:00:10,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:10,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569361409] [2021-03-10 22:00:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:10,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569361409] [2021-03-10 22:00:10,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367339129] [2021-03-10 22:00:10,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:10,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:10,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:10,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:10,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:10,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:10,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:10,690 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:10,693 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:10,696 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:10,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:10,710 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:10,714 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:10,717 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:10,719 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,775 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-03-10 22:00:10,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:10,776 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 22:00:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:10,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:10,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:10,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784041012] [2021-03-10 22:00:10,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:10,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:10,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:10,874 INFO L87 Difference]: Start difference. First operand 475 states and 1488 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:11,634 INFO L93 Difference]: Finished difference Result 652 states and 1922 transitions. [2021-03-10 22:00:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:00:11,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:11,635 INFO L225 Difference]: With dead ends: 652 [2021-03-10 22:00:11,635 INFO L226 Difference]: Without dead ends: 602 [2021-03-10 22:00:11,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 800.9ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:00:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-03-10 22:00:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 472. [2021-03-10 22:00:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.142250530785563) internal successors, (1480), 471 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1480 transitions. [2021-03-10 22:00:11,641 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1480 transitions. Word has length 19 [2021-03-10 22:00:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:11,641 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 1480 transitions. [2021-03-10 22:00:11,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1480 transitions. [2021-03-10 22:00:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:11,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:11,642 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:11,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable905,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:11,842 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash 253481524, now seen corresponding path program 44 times [2021-03-10 22:00:11,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:11,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371195804] [2021-03-10 22:00:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:11,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371195804] [2021-03-10 22:00:11,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322553502] [2021-03-10 22:00:11,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:12,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:12,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:12,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:12,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:12,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:12,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:12,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:12,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:12,198 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:12,201 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:12,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,260 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:00:12,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:12,261 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:254, output treesize:67 [2021-03-10 22:00:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:12,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:12,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:12,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948941785] [2021-03-10 22:00:12,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:12,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:12,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:12,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:12,355 INFO L87 Difference]: Start difference. First operand 472 states and 1480 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:13,194 INFO L93 Difference]: Finished difference Result 695 states and 2030 transitions. [2021-03-10 22:00:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:00:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:13,196 INFO L225 Difference]: With dead ends: 695 [2021-03-10 22:00:13,196 INFO L226 Difference]: Without dead ends: 667 [2021-03-10 22:00:13,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 942.4ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:00:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-03-10 22:00:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 469. [2021-03-10 22:00:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1452991452991452) internal successors, (1472), 468 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1472 transitions. [2021-03-10 22:00:13,202 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1472 transitions. Word has length 19 [2021-03-10 22:00:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:13,202 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 1472 transitions. [2021-03-10 22:00:13,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1472 transitions. [2021-03-10 22:00:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:13,203 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:13,203 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:13,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-03-10 22:00:13,403 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1363700404, now seen corresponding path program 45 times [2021-03-10 22:00:13,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:13,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019278029] [2021-03-10 22:00:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:13,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019278029] [2021-03-10 22:00:13,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157548666] [2021-03-10 22:00:13,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:13,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:13,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:13,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:13,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:13,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:13,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:13,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:13,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:13,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:13,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:13,746 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:00:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:13,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:13,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:13,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261762159] [2021-03-10 22:00:13,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:13,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:13,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:13,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:13,790 INFO L87 Difference]: Start difference. First operand 469 states and 1472 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:14,497 INFO L93 Difference]: Finished difference Result 624 states and 1859 transitions. [2021-03-10 22:00:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:14,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:14,500 INFO L225 Difference]: With dead ends: 624 [2021-03-10 22:00:14,500 INFO L226 Difference]: Without dead ends: 595 [2021-03-10 22:00:14,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 786.2ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-03-10 22:00:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 473. [2021-03-10 22:00:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1483050847457625) internal successors, (1486), 472 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1486 transitions. [2021-03-10 22:00:14,505 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1486 transitions. Word has length 19 [2021-03-10 22:00:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:14,505 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 1486 transitions. [2021-03-10 22:00:14,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1486 transitions. [2021-03-10 22:00:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:14,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:14,506 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:14,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-03-10 22:00:14,706 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:14,707 INFO L82 PathProgramCache]: Analyzing trace with hash -76737914, now seen corresponding path program 46 times [2021-03-10 22:00:14,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:14,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015247677] [2021-03-10 22:00:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:14,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015247677] [2021-03-10 22:00:14,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529504365] [2021-03-10 22:00:14,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:14,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:14,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:14,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:14,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:15,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:15,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:15,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:15,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:15,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:15,073 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:15,077 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:15,081 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:15,084 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:15,088 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,143 INFO L628 ElimStorePlain]: treesize reduction 25, result has 72.8 percent of original size [2021-03-10 22:00:15,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:15,144 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:345, output treesize:67 [2021-03-10 22:00:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:15,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:15,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:15,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114319961] [2021-03-10 22:00:15,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:15,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:15,255 INFO L87 Difference]: Start difference. First operand 473 states and 1486 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:15,982 INFO L93 Difference]: Finished difference Result 688 states and 2010 transitions. [2021-03-10 22:00:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:15,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:15,984 INFO L225 Difference]: With dead ends: 688 [2021-03-10 22:00:15,984 INFO L226 Difference]: Without dead ends: 638 [2021-03-10 22:00:15,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:15,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-03-10 22:00:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 472. [2021-03-10 22:00:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.157112526539278) internal successors, (1487), 471 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1487 transitions. [2021-03-10 22:00:15,990 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1487 transitions. Word has length 19 [2021-03-10 22:00:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:15,990 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 1487 transitions. [2021-03-10 22:00:15,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1487 transitions. [2021-03-10 22:00:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:15,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:15,990 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:16,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:16,191 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1748500812, now seen corresponding path program 47 times [2021-03-10 22:00:16,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:16,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582462091] [2021-03-10 22:00:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:16,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582462091] [2021-03-10 22:00:16,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439691423] [2021-03-10 22:00:16,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:16,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:16,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:16,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:16,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:16,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:16,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:16,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:16,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:16,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:16,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:16,567 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:16,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:16,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:16,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:16,572 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:16,631 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:00:16,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:16,632 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 22:00:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:16,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:16,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:16,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661182842] [2021-03-10 22:00:16,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:16,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:16,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:16,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:16,736 INFO L87 Difference]: Start difference. First operand 472 states and 1487 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:17,196 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-03-10 22:00:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:17,715 INFO L93 Difference]: Finished difference Result 720 states and 2127 transitions. [2021-03-10 22:00:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:00:17,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:17,716 INFO L225 Difference]: With dead ends: 720 [2021-03-10 22:00:17,717 INFO L226 Difference]: Without dead ends: 648 [2021-03-10 22:00:17,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1037.7ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:00:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-03-10 22:00:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 474. [2021-03-10 22:00:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1543340380549685) internal successors, (1492), 473 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1492 transitions. [2021-03-10 22:00:17,722 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1492 transitions. Word has length 19 [2021-03-10 22:00:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:17,722 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 1492 transitions. [2021-03-10 22:00:17,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1492 transitions. [2021-03-10 22:00:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:17,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:17,723 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:17,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable967 [2021-03-10 22:00:17,924 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:17,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:17,924 INFO L82 PathProgramCache]: Analyzing trace with hash -169123340, now seen corresponding path program 48 times [2021-03-10 22:00:17,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:17,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261597511] [2021-03-10 22:00:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:18,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261597511] [2021-03-10 22:00:18,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580434164] [2021-03-10 22:00:18,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:18,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:18,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:18,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:18,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:18,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:18,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:18,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:18,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:18,300 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:18,305 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:18,310 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:18,315 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:18,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:18,325 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:18,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:18,333 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:18,339 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:18,343 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:18,347 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:18,351 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:18,354 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:18,358 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:18,362 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:18,366 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:18,370 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:18,373 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:18,381 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:18,386 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:18,390 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,584 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:00:18,584 INFO L628 ElimStorePlain]: treesize reduction 101, result has 68.7 percent of original size [2021-03-10 22:00:18,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:00:18,586 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-03-10 22:00:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:18,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:18,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:18,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027963308] [2021-03-10 22:00:18,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:18,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:18,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:18,825 INFO L87 Difference]: Start difference. First operand 474 states and 1492 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:19,420 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:00:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:19,859 INFO L93 Difference]: Finished difference Result 770 states and 2232 transitions. [2021-03-10 22:00:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:00:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:19,860 INFO L225 Difference]: With dead ends: 770 [2021-03-10 22:00:19,860 INFO L226 Difference]: Without dead ends: 727 [2021-03-10 22:00:19,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1185.0ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:00:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-03-10 22:00:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 477. [2021-03-10 22:00:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1659663865546217) internal successors, (1507), 476 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1507 transitions. [2021-03-10 22:00:19,866 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1507 transitions. Word has length 19 [2021-03-10 22:00:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:19,867 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1507 transitions. [2021-03-10 22:00:19,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1507 transitions. [2021-03-10 22:00:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:19,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:19,867 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:20,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-03-10 22:00:20,068 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:20,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1123219060, now seen corresponding path program 49 times [2021-03-10 22:00:20,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:20,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785700358] [2021-03-10 22:00:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:20,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785700358] [2021-03-10 22:00:20,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524858473] [2021-03-10 22:00:20,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:20,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:20,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:20,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:20,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:20,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:20,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:20,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:20,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:20,400 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:20,404 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:20,408 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:20,413 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:20,417 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:20,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:20,428 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:20,432 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:20,435 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,607 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:00:20,607 INFO L628 ElimStorePlain]: treesize reduction 41, result has 84.4 percent of original size [2021-03-10 22:00:20,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:00:20,609 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-03-10 22:00:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:20,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:20,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:20,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66898876] [2021-03-10 22:00:20,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:20,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:20,879 INFO L87 Difference]: Start difference. First operand 477 states and 1507 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,451 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:00:21,685 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 22:00:21,918 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:00:22,042 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-03-10 22:00:22,260 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 22:00:22,476 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 22:00:22,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:22,582 INFO L93 Difference]: Finished difference Result 657 states and 1954 transitions. [2021-03-10 22:00:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:00:22,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:22,583 INFO L225 Difference]: With dead ends: 657 [2021-03-10 22:00:22,583 INFO L226 Difference]: Without dead ends: 635 [2021-03-10 22:00:22,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1847.7ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:00:22,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-03-10 22:00:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 474. [2021-03-10 22:00:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1543340380549685) internal successors, (1492), 473 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1492 transitions. [2021-03-10 22:00:22,589 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1492 transitions. Word has length 19 [2021-03-10 22:00:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:22,589 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 1492 transitions. [2021-03-10 22:00:22,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1492 transitions. [2021-03-10 22:00:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:22,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:22,589 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:22,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:22,790 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1684500614, now seen corresponding path program 50 times [2021-03-10 22:00:22,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:22,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374741814] [2021-03-10 22:00:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:22,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374741814] [2021-03-10 22:00:22,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83593436] [2021-03-10 22:00:22,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:22,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:22,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:22,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:22,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:23,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:23,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:23,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:23,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:23,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:23,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:23,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:23,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:23,169 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:23,171 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:23,174 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:23,177 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:23,180 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,236 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-03-10 22:00:23,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:23,237 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:460, output treesize:67 [2021-03-10 22:00:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:23,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:23,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:23,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527416617] [2021-03-10 22:00:23,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:23,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:23,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:23,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:23,328 INFO L87 Difference]: Start difference. First operand 474 states and 1492 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:24,062 INFO L93 Difference]: Finished difference Result 702 states and 2063 transitions. [2021-03-10 22:00:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:00:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:24,063 INFO L225 Difference]: With dead ends: 702 [2021-03-10 22:00:24,063 INFO L226 Difference]: Without dead ends: 659 [2021-03-10 22:00:24,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 835.4ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:00:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-03-10 22:00:24,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 477. [2021-03-10 22:00:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1659663865546217) internal successors, (1507), 476 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1507 transitions. [2021-03-10 22:00:24,068 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1507 transitions. Word has length 19 [2021-03-10 22:00:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:24,069 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1507 transitions. [2021-03-10 22:00:24,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1507 transitions. [2021-03-10 22:00:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:24,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:24,069 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:24,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-03-10 22:00:24,270 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:24,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1859066244, now seen corresponding path program 51 times [2021-03-10 22:00:24,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:24,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55186963] [2021-03-10 22:00:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55186963] [2021-03-10 22:00:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705060192] [2021-03-10 22:00:24,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:24,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:00:24,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:24,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:24,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:24,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:24,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:24,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:24,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:24,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:24,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:24,584 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:24,588 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:24,592 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:24,595 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:24,599 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:24,602 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:24,606 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:24,609 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:24,613 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:24,616 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:24,619 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:24,623 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:24,626 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:24,630 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:24,632 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:24,635 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,780 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 22:00:24,781 INFO L628 ElimStorePlain]: treesize reduction 182, result has 49.6 percent of original size [2021-03-10 22:00:24,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:00:24,782 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:179 [2021-03-10 22:00:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:24,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:24,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:24,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360181939] [2021-03-10 22:00:24,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:24,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:24,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:24,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:24,962 INFO L87 Difference]: Start difference. First operand 477 states and 1507 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:25,494 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:00:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:25,733 INFO L93 Difference]: Finished difference Result 678 states and 2026 transitions. [2021-03-10 22:00:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:25,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:25,734 INFO L225 Difference]: With dead ends: 678 [2021-03-10 22:00:25,734 INFO L226 Difference]: Without dead ends: 663 [2021-03-10 22:00:25,734 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 873.6ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:00:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-10 22:00:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 480. [2021-03-10 22:00:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1774530271398747) internal successors, (1522), 479 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1522 transitions. [2021-03-10 22:00:25,740 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1522 transitions. Word has length 19 [2021-03-10 22:00:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:25,740 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 1522 transitions. [2021-03-10 22:00:25,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1522 transitions. [2021-03-10 22:00:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:25,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:25,740 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:25,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:25,955 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:25,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:25,955 INFO L82 PathProgramCache]: Analyzing trace with hash -566723844, now seen corresponding path program 52 times [2021-03-10 22:00:25,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:25,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668177283] [2021-03-10 22:00:25,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:26,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668177283] [2021-03-10 22:00:26,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238608390] [2021-03-10 22:00:26,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:26,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:26,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:26,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:26,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:26,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:26,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:26,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:26,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:26,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:26,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:26,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:26,321 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:26,325 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:26,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:26,333 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:26,337 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:26,341 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:26,345 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:26,349 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:26,353 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:26,357 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:26,360 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:26,365 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:26,368 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:26,372 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:26,375 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:26,378 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:26,381 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,562 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 22:00:26,562 INFO L628 ElimStorePlain]: treesize reduction 130, result has 63.1 percent of original size [2021-03-10 22:00:26,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:00:26,564 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1039, output treesize:222 [2021-03-10 22:00:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:26,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:26,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:26,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412216283] [2021-03-10 22:00:26,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:26,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:26,822 INFO L87 Difference]: Start difference. First operand 480 states and 1522 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:27,421 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:00:27,682 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 22:00:27,929 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:00:28,234 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 22:00:28,480 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 22:00:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:28,671 INFO L93 Difference]: Finished difference Result 712 states and 2150 transitions. [2021-03-10 22:00:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:00:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:28,672 INFO L225 Difference]: With dead ends: 712 [2021-03-10 22:00:28,672 INFO L226 Difference]: Without dead ends: 690 [2021-03-10 22:00:28,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1958.3ms TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:00:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-03-10 22:00:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 476. [2021-03-10 22:00:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.166315789473684) internal successors, (1504), 475 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1504 transitions. [2021-03-10 22:00:28,678 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1504 transitions. Word has length 19 [2021-03-10 22:00:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:28,679 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1504 transitions. [2021-03-10 22:00:28,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1504 transitions. [2021-03-10 22:00:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:28,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:28,679 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:28,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1060,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:28,880 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:28,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1600789196, now seen corresponding path program 53 times [2021-03-10 22:00:28,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:28,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026327728] [2021-03-10 22:00:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:29,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026327728] [2021-03-10 22:00:29,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125380926] [2021-03-10 22:00:29,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:29,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:29,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:29,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:29,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:29,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:29,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:29,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:29,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:29,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:29,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:29,244 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:29,248 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:29,251 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:29,254 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:29,257 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:29,260 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,316 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-03-10 22:00:29,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:29,317 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 22:00:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:29,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:29,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:29,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301896255] [2021-03-10 22:00:29,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:29,436 INFO L87 Difference]: Start difference. First operand 476 states and 1504 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:30,180 INFO L93 Difference]: Finished difference Result 803 states and 2383 transitions. [2021-03-10 22:00:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:30,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:30,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:30,181 INFO L225 Difference]: With dead ends: 803 [2021-03-10 22:00:30,181 INFO L226 Difference]: Without dead ends: 775 [2021-03-10 22:00:30,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 878.6ms TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-03-10 22:00:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 482. [2021-03-10 22:00:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.1746361746361744) internal successors, (1527), 481 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1527 transitions. [2021-03-10 22:00:30,188 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1527 transitions. Word has length 19 [2021-03-10 22:00:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:30,188 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1527 transitions. [2021-03-10 22:00:30,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1527 transitions. [2021-03-10 22:00:30,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:30,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:30,189 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:30,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1082,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:30,391 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:30,392 INFO L82 PathProgramCache]: Analyzing trace with hash 411566906, now seen corresponding path program 54 times [2021-03-10 22:00:30,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:30,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407728161] [2021-03-10 22:00:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:30,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407728161] [2021-03-10 22:00:30,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150052381] [2021-03-10 22:00:30,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:30,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:00:30,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:30,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:30,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:30,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:30,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:30,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:30,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:30,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:30,793 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:30,796 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:30,799 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:30,802 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:30,805 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:30,808 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,868 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-03-10 22:00:30,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:30,869 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 22:00:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:30,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:30,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:30,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083608557] [2021-03-10 22:00:30,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:30,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:30,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:30,977 INFO L87 Difference]: Start difference. First operand 482 states and 1527 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,672 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 22:00:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:31,831 INFO L93 Difference]: Finished difference Result 781 states and 2294 transitions. [2021-03-10 22:00:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:31,832 INFO L225 Difference]: With dead ends: 781 [2021-03-10 22:00:31,832 INFO L226 Difference]: Without dead ends: 732 [2021-03-10 22:00:31,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 997.5ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-03-10 22:00:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 491. [2021-03-10 22:00:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1857142857142855) internal successors, (1561), 490 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1561 transitions. [2021-03-10 22:00:31,839 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1561 transitions. Word has length 19 [2021-03-10 22:00:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:31,839 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 1561 transitions. [2021-03-10 22:00:31,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1561 transitions. [2021-03-10 22:00:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:31,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:31,839 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:32,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1098,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:32,040 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1162967344, now seen corresponding path program 55 times [2021-03-10 22:00:32,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:32,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606004390] [2021-03-10 22:00:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:32,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606004390] [2021-03-10 22:00:32,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697183860] [2021-03-10 22:00:32,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:32,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:32,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:32,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:32,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:32,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:32,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:32,453 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:32,458 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:32,462 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:32,466 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:32,469 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:32,473 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:32,477 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:32,481 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:32,484 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:32,495 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:32,499 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:32,502 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:32,505 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,687 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:00:32,687 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 22:00:32,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:00:32,689 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:763, output treesize:222 [2021-03-10 22:00:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:32,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:32,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:32,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927850359] [2021-03-10 22:00:32,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:32,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:32,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:32,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:32,916 INFO L87 Difference]: Start difference. First operand 491 states and 1561 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,604 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-03-10 22:00:33,776 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-03-10 22:00:33,999 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-03-10 22:00:34,142 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2021-03-10 22:00:34,367 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2021-03-10 22:00:34,621 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2021-03-10 22:00:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:34,629 INFO L93 Difference]: Finished difference Result 833 states and 2435 transitions. [2021-03-10 22:00:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:34,631 INFO L225 Difference]: With dead ends: 833 [2021-03-10 22:00:34,631 INFO L226 Difference]: Without dead ends: 790 [2021-03-10 22:00:34,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1865.9ms TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:00:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-03-10 22:00:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 494. [2021-03-10 22:00:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.1967545638945234) internal successors, (1576), 493 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1576 transitions. [2021-03-10 22:00:34,638 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1576 transitions. Word has length 19 [2021-03-10 22:00:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:34,638 INFO L480 AbstractCegarLoop]: Abstraction has 494 states and 1576 transitions. [2021-03-10 22:00:34,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1576 transitions. [2021-03-10 22:00:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:34,638 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:34,638 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:34,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1114 [2021-03-10 22:00:34,839 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:34,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1839657552, now seen corresponding path program 56 times [2021-03-10 22:00:34,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:34,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861509580] [2021-03-10 22:00:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:34,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861509580] [2021-03-10 22:00:34,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628745832] [2021-03-10 22:00:34,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:35,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:35,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:35,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:35,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:35,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:35,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:35,213 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:35,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:35,226 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,231 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,235 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,239 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,243 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,247 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:35,252 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,256 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,260 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:35,265 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:35,269 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:35,272 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:35,276 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:35,282 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:35,286 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:35,291 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:35,294 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:35,298 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:35,301 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:35,305 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:35,308 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,487 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 22:00:35,488 INFO L628 ElimStorePlain]: treesize reduction 156, result has 58.7 percent of original size [2021-03-10 22:00:35,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:00:35,489 INFO L247 ElimStorePlain]: Needed 29 recursive calls to eliminate 1 variables, input treesize:1233, output treesize:222 [2021-03-10 22:00:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:35,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:35,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:35,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749449083] [2021-03-10 22:00:35,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:35,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:35,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:35,750 INFO L87 Difference]: Start difference. First operand 494 states and 1576 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:36,478 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-03-10 22:00:36,813 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-03-10 22:00:37,092 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-03-10 22:00:37,280 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 40 [2021-03-10 22:00:37,565 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2021-03-10 22:00:37,826 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-03-10 22:00:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:37,932 INFO L93 Difference]: Finished difference Result 757 states and 2267 transitions. [2021-03-10 22:00:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:37,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:37,933 INFO L225 Difference]: With dead ends: 757 [2021-03-10 22:00:37,933 INFO L226 Difference]: Without dead ends: 735 [2021-03-10 22:00:37,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2331.8ms TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:00:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-03-10 22:00:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 489. [2021-03-10 22:00:37,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.180327868852459) internal successors, (1552), 488 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:37,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1552 transitions. [2021-03-10 22:00:37,939 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1552 transitions. Word has length 19 [2021-03-10 22:00:37,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:37,939 INFO L480 AbstractCegarLoop]: Abstraction has 489 states and 1552 transitions. [2021-03-10 22:00:37,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1552 transitions. [2021-03-10 22:00:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:37,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:37,940 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:38,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1133 [2021-03-10 22:00:38,157 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1833437172, now seen corresponding path program 57 times [2021-03-10 22:00:38,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:38,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728737703] [2021-03-10 22:00:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:38,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728737703] [2021-03-10 22:00:38,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945624371] [2021-03-10 22:00:38,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:38,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:38,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:38,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:38,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:38,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:38,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:38,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:38,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:38,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:38,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:38,445 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:00:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:38,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:38,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:38,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738954123] [2021-03-10 22:00:38,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:38,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:38,492 INFO L87 Difference]: Start difference. First operand 489 states and 1552 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:39,014 INFO L93 Difference]: Finished difference Result 704 states and 2106 transitions. [2021-03-10 22:00:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:39,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:39,015 INFO L225 Difference]: With dead ends: 704 [2021-03-10 22:00:39,015 INFO L226 Difference]: Without dead ends: 664 [2021-03-10 22:00:39,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 546.4ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-03-10 22:00:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 494. [2021-03-10 22:00:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.1744421906693714) internal successors, (1565), 493 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1565 transitions. [2021-03-10 22:00:39,022 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1565 transitions. Word has length 19 [2021-03-10 22:00:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:39,022 INFO L480 AbstractCegarLoop]: Abstraction has 494 states and 1565 transitions. [2021-03-10 22:00:39,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1565 transitions. [2021-03-10 22:00:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:39,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:39,023 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:39,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1158 [2021-03-10 22:00:39,239 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1997410650, now seen corresponding path program 58 times [2021-03-10 22:00:39,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:39,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29752147] [2021-03-10 22:00:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:39,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29752147] [2021-03-10 22:00:39,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882461917] [2021-03-10 22:00:39,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:39,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:39,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:39,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:39,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:39,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:39,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:39,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:39,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:39,557 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:00:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:39,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:39,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:39,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585008716] [2021-03-10 22:00:39,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:39,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:39,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:39,607 INFO L87 Difference]: Start difference. First operand 494 states and 1565 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:40,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:40,148 INFO L93 Difference]: Finished difference Result 696 states and 2089 transitions. [2021-03-10 22:00:40,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:40,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:40,149 INFO L225 Difference]: With dead ends: 696 [2021-03-10 22:00:40,149 INFO L226 Difference]: Without dead ends: 667 [2021-03-10 22:00:40,150 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 568.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-03-10 22:00:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 494. [2021-03-10 22:00:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.1744421906693714) internal successors, (1565), 493 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1565 transitions. [2021-03-10 22:00:40,155 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1565 transitions. Word has length 19 [2021-03-10 22:00:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:40,155 INFO L480 AbstractCegarLoop]: Abstraction has 494 states and 1565 transitions. [2021-03-10 22:00:40,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1565 transitions. [2021-03-10 22:00:40,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:40,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:40,156 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:40,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1170,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:40,357 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:40,357 INFO L82 PathProgramCache]: Analyzing trace with hash 857118328, now seen corresponding path program 59 times [2021-03-10 22:00:40,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:40,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105312756] [2021-03-10 22:00:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:40,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105312756] [2021-03-10 22:00:40,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005778302] [2021-03-10 22:00:40,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:40,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:40,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:40,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:40,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:40,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:40,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:40,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:40,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:40,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:40,676 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:40,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:40,683 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:40,686 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,743 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:00:40,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:40,744 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:343, output treesize:67 [2021-03-10 22:00:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:40,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:40,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:40,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050115942] [2021-03-10 22:00:40,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:40,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:40,839 INFO L87 Difference]: Start difference. First operand 494 states and 1565 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:41,578 INFO L93 Difference]: Finished difference Result 729 states and 2170 transitions. [2021-03-10 22:00:41,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:00:41,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:41,579 INFO L225 Difference]: With dead ends: 729 [2021-03-10 22:00:41,579 INFO L226 Difference]: Without dead ends: 679 [2021-03-10 22:00:41,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-03-10 22:00:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 494. [2021-03-10 22:00:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.1744421906693714) internal successors, (1565), 493 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1565 transitions. [2021-03-10 22:00:41,585 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1565 transitions. Word has length 19 [2021-03-10 22:00:41,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:41,585 INFO L480 AbstractCegarLoop]: Abstraction has 494 states and 1565 transitions. [2021-03-10 22:00:41,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:41,585 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1565 transitions. [2021-03-10 22:00:41,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:41,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:41,586 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:41,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1178 [2021-03-10 22:00:41,795 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash -903319062, now seen corresponding path program 60 times [2021-03-10 22:00:41,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:41,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254127398] [2021-03-10 22:00:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:41,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254127398] [2021-03-10 22:00:41,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574039956] [2021-03-10 22:00:41,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:41,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:41,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:41,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:42,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:42,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:42,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:42,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:42,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:42,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:42,113 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:00:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:42,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:42,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:42,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857988679] [2021-03-10 22:00:42,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:42,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:42,172 INFO L87 Difference]: Start difference. First operand 494 states and 1565 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:42,583 INFO L93 Difference]: Finished difference Result 710 states and 2119 transitions. [2021-03-10 22:00:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:00:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:42,585 INFO L225 Difference]: With dead ends: 710 [2021-03-10 22:00:42,585 INFO L226 Difference]: Without dead ends: 681 [2021-03-10 22:00:42,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-03-10 22:00:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 497. [2021-03-10 22:00:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1713709677419355) internal successors, (1573), 496 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1573 transitions. [2021-03-10 22:00:42,590 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1573 transitions. Word has length 19 [2021-03-10 22:00:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:42,590 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1573 transitions. [2021-03-10 22:00:42,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1573 transitions. [2021-03-10 22:00:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:42,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:42,591 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:42,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:42,791 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1951209916, now seen corresponding path program 61 times [2021-03-10 22:00:42,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:42,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680573671] [2021-03-10 22:00:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:42,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680573671] [2021-03-10 22:00:42,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617668693] [2021-03-10 22:00:42,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:42,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:42,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:43,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:43,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:43,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:43,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:43,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:43,095 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:43,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:43,102 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:43,105 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:43,108 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:43,110 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:43,113 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:43,117 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:43,120 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:43,122 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:43,125 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,181 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-03-10 22:00:43,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:43,182 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 1 variables, input treesize:589, output treesize:67 [2021-03-10 22:00:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:43,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:43,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:43,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349865141] [2021-03-10 22:00:43,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:43,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:43,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:43,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:43,276 INFO L87 Difference]: Start difference. First operand 497 states and 1573 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:43,837 INFO L93 Difference]: Finished difference Result 743 states and 2200 transitions. [2021-03-10 22:00:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:43,839 INFO L225 Difference]: With dead ends: 743 [2021-03-10 22:00:43,839 INFO L226 Difference]: Without dead ends: 693 [2021-03-10 22:00:43,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 555.3ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-03-10 22:00:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 497. [2021-03-10 22:00:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1713709677419355) internal successors, (1573), 496 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1573 transitions. [2021-03-10 22:00:43,845 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1573 transitions. Word has length 19 [2021-03-10 22:00:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:43,845 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1573 transitions. [2021-03-10 22:00:43,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1573 transitions. [2021-03-10 22:00:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:43,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:43,846 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:44,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:44,046 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:44,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:44,047 INFO L82 PathProgramCache]: Analyzing trace with hash -194960844, now seen corresponding path program 62 times [2021-03-10 22:00:44,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:44,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428606210] [2021-03-10 22:00:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:44,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428606210] [2021-03-10 22:00:44,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731128191] [2021-03-10 22:00:44,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:44,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:44,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:44,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:44,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:44,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:44,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:44,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:44,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:44,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:44,301 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:44,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:44,307 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:44,310 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:44,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:44,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:44,320 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:44,322 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,379 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-03-10 22:00:44,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:44,380 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 22:00:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:44,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:44,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:00:44,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553750021] [2021-03-10 22:00:44,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:00:44,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:44,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:00:44,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:44,468 INFO L87 Difference]: Start difference. First operand 497 states and 1573 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:44,917 INFO L93 Difference]: Finished difference Result 710 states and 2130 transitions. [2021-03-10 22:00:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:00:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:44,918 INFO L225 Difference]: With dead ends: 710 [2021-03-10 22:00:44,919 INFO L226 Difference]: Without dead ends: 660 [2021-03-10 22:00:44,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:00:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-03-10 22:00:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 497. [2021-03-10 22:00:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1713709677419355) internal successors, (1573), 496 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1573 transitions. [2021-03-10 22:00:44,924 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1573 transitions. Word has length 19 [2021-03-10 22:00:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:44,924 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1573 transitions. [2021-03-10 22:00:44,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1573 transitions. [2021-03-10 22:00:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:44,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:44,925 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:45,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1226,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:45,126 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:45,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:45,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1920214934, now seen corresponding path program 63 times [2021-03-10 22:00:45,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:45,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500215745] [2021-03-10 22:00:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:45,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500215745] [2021-03-10 22:00:45,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61083538] [2021-03-10 22:00:45,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:45,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:45,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:45,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:45,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:45,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:45,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:45,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:45,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:45,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:45,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:00:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:45,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:45,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:45,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770655809] [2021-03-10 22:00:45,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:45,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:45,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:45,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:45,559 INFO L87 Difference]: Start difference. First operand 497 states and 1573 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:46,707 INFO L93 Difference]: Finished difference Result 1013 states and 2915 transitions. [2021-03-10 22:00:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:00:46,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:46,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:46,709 INFO L225 Difference]: With dead ends: 1013 [2021-03-10 22:00:46,709 INFO L226 Difference]: Without dead ends: 943 [2021-03-10 22:00:46,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1183.7ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:00:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-03-10 22:00:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 511. [2021-03-10 22:00:46,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.1784313725490194) internal successors, (1621), 510 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1621 transitions. [2021-03-10 22:00:46,716 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1621 transitions. Word has length 19 [2021-03-10 22:00:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:46,716 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1621 transitions. [2021-03-10 22:00:46,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1621 transitions. [2021-03-10 22:00:46,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:46,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:46,717 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:46,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1242 [2021-03-10 22:00:46,918 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1459737962, now seen corresponding path program 64 times [2021-03-10 22:00:46,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:46,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233797056] [2021-03-10 22:00:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:47,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233797056] [2021-03-10 22:00:47,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383320769] [2021-03-10 22:00:47,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:47,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:47,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:47,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:47,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:47,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:47,428 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:00:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:47,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:47,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:47,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583638771] [2021-03-10 22:00:47,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:47,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:47,475 INFO L87 Difference]: Start difference. First operand 511 states and 1621 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:47,961 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-03-10 22:00:48,191 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-03-10 22:00:48,345 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2021-03-10 22:00:48,571 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-03-10 22:00:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:48,589 INFO L93 Difference]: Finished difference Result 910 states and 2648 transitions. [2021-03-10 22:00:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:48,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:48,590 INFO L225 Difference]: With dead ends: 910 [2021-03-10 22:00:48,591 INFO L226 Difference]: Without dead ends: 881 [2021-03-10 22:00:48,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1294.4ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:00:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-03-10 22:00:48,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 511. [2021-03-10 22:00:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.1784313725490194) internal successors, (1621), 510 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1621 transitions. [2021-03-10 22:00:48,601 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1621 transitions. Word has length 19 [2021-03-10 22:00:48,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:48,601 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1621 transitions. [2021-03-10 22:00:48,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:48,601 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1621 transitions. [2021-03-10 22:00:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:48,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:48,602 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:48,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-03-10 22:00:48,803 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash 692891814, now seen corresponding path program 65 times [2021-03-10 22:00:48,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:48,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098351708] [2021-03-10 22:00:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:49,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098351708] [2021-03-10 22:00:49,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52545031] [2021-03-10 22:00:49,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:49,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:49,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:49,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:49,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:49,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:49,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:49,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:49,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:49,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:49,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:49,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,301 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:00:49,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:49,302 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:218, output treesize:81 [2021-03-10 22:00:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:49,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:49,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:49,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142917193] [2021-03-10 22:00:49,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:49,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:49,401 INFO L87 Difference]: Start difference. First operand 511 states and 1621 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:49,875 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:00:50,105 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-03-10 22:00:50,396 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-03-10 22:00:50,580 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2021-03-10 22:00:50,815 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-03-10 22:00:51,053 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-03-10 22:00:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:51,078 INFO L93 Difference]: Finished difference Result 968 states and 2775 transitions. [2021-03-10 22:00:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:00:51,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:51,080 INFO L225 Difference]: With dead ends: 968 [2021-03-10 22:00:51,080 INFO L226 Difference]: Without dead ends: 924 [2021-03-10 22:00:51,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1845.2ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:00:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-03-10 22:00:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 507. [2021-03-10 22:00:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.175889328063241) internal successors, (1607), 506 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1607 transitions. [2021-03-10 22:00:51,087 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1607 transitions. Word has length 19 [2021-03-10 22:00:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:51,087 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1607 transitions. [2021-03-10 22:00:51,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1607 transitions. [2021-03-10 22:00:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:51,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:51,088 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:51,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1266 [2021-03-10 22:00:51,291 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:51,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:51,292 INFO L82 PathProgramCache]: Analyzing trace with hash 168702634, now seen corresponding path program 66 times [2021-03-10 22:00:51,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:51,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125356364] [2021-03-10 22:00:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:51,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125356364] [2021-03-10 22:00:51,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205695252] [2021-03-10 22:00:51,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:51,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:51,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:51,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:51,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:51,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:51,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:51,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:51,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:51,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:51,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:51,771 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:00:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:51,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:51,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:51,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108810926] [2021-03-10 22:00:51,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:51,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:51,817 INFO L87 Difference]: Start difference. First operand 507 states and 1607 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:52,257 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 22:00:52,382 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-03-10 22:00:52,562 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-03-10 22:00:53,016 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 22:00:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:53,035 INFO L93 Difference]: Finished difference Result 923 states and 2694 transitions. [2021-03-10 22:00:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:00:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:53,037 INFO L225 Difference]: With dead ends: 923 [2021-03-10 22:00:53,037 INFO L226 Difference]: Without dead ends: 894 [2021-03-10 22:00:53,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1351.0ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:00:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-03-10 22:00:53,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 508. [2021-03-10 22:00:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.1814595660749507) internal successors, (1613), 507 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1613 transitions. [2021-03-10 22:00:53,044 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1613 transitions. Word has length 19 [2021-03-10 22:00:53,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:53,044 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 1613 transitions. [2021-03-10 22:00:53,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,044 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1613 transitions. [2021-03-10 22:00:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:53,044 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:53,045 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:53,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1283,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:53,245 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1271735684, now seen corresponding path program 67 times [2021-03-10 22:00:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:53,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15683414] [2021-03-10 22:00:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:53,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15683414] [2021-03-10 22:00:53,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36162747] [2021-03-10 22:00:53,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:53,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:53,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:53,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:53,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:53,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:53,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:53,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:53,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:53,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:53,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:53,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:53,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:53,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:53,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:53,666 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:53,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:53,669 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:53,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:53,672 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:53,727 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-03-10 22:00:53,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:53,727 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:00:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:53,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:53,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:00:53,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461359563] [2021-03-10 22:00:53,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:00:53,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:00:53,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:53,819 INFO L87 Difference]: Start difference. First operand 508 states and 1613 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:54,452 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 22:00:54,674 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 22:00:54,806 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 22:00:55,131 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-10 22:00:55,260 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 22:00:55,472 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-10 22:00:55,671 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-10 22:00:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:55,697 INFO L93 Difference]: Finished difference Result 1445 states and 4114 transitions. [2021-03-10 22:00:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:00:55,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:55,699 INFO L225 Difference]: With dead ends: 1445 [2021-03-10 22:00:55,699 INFO L226 Difference]: Without dead ends: 1348 [2021-03-10 22:00:55,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1903.0ms TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:00:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-03-10 22:00:55,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 555. [2021-03-10 22:00:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 3.2545126353790614) internal successors, (1803), 554 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1803 transitions. [2021-03-10 22:00:55,709 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1803 transitions. Word has length 19 [2021-03-10 22:00:55,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:55,709 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1803 transitions. [2021-03-10 22:00:55,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1803 transitions. [2021-03-10 22:00:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:55,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:55,709 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:55,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1294,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:55,910 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1351468714, now seen corresponding path program 68 times [2021-03-10 22:00:55,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:55,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953615899] [2021-03-10 22:00:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:56,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953615899] [2021-03-10 22:00:56,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966052558] [2021-03-10 22:00:56,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:56,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:56,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:56,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:56,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:56,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:56,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:56,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:56,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:56,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:56,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:56,267 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:56,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:56,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:56,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:56,272 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:56,333 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:00:56,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:56,335 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 22:00:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:56,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:56,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:56,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832433437] [2021-03-10 22:00:56,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:56,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:56,444 INFO L87 Difference]: Start difference. First operand 555 states and 1803 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,853 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 22:00:57,033 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-03-10 22:00:57,185 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-10 22:00:57,584 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-03-10 22:00:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:57,617 INFO L93 Difference]: Finished difference Result 978 states and 2897 transitions. [2021-03-10 22:00:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:00:57,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:57,619 INFO L225 Difference]: With dead ends: 978 [2021-03-10 22:00:57,619 INFO L226 Difference]: Without dead ends: 934 [2021-03-10 22:00:57,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1220.8ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-03-10 22:00:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 553. [2021-03-10 22:00:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 3.25) internal successors, (1794), 552 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1794 transitions. [2021-03-10 22:00:57,626 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1794 transitions. Word has length 19 [2021-03-10 22:00:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:57,626 INFO L480 AbstractCegarLoop]: Abstraction has 553 states and 1794 transitions. [2021-03-10 22:00:57,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1794 transitions. [2021-03-10 22:00:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:57,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:57,627 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:57,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-03-10 22:00:57,827 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:57,828 INFO L82 PathProgramCache]: Analyzing trace with hash -797169030, now seen corresponding path program 69 times [2021-03-10 22:00:57,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:57,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323229920] [2021-03-10 22:00:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:57,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323229920] [2021-03-10 22:00:57,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628643360] [2021-03-10 22:00:57,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:58,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:00:58,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:58,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:58,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:58,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:58,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:58,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:58,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:58,181 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:58,184 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:58,188 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:58,192 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:58,195 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:58,199 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:58,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:58,206 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:58,209 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:58,213 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:58,216 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:58,219 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:00:58,223 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,400 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:00:58,401 INFO L628 ElimStorePlain]: treesize reduction 76, result has 74.5 percent of original size [2021-03-10 22:00:58,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:00:58,402 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:00:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:58,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:58,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:00:58,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036647354] [2021-03-10 22:00:58,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:58,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:58,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:58,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:58,635 INFO L87 Difference]: Start difference. First operand 553 states and 1794 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:59,024 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-10 22:00:59,332 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-10 22:00:59,480 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-03-10 22:00:59,644 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-03-10 22:00:59,902 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-10 22:01:00,094 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 22:01:00,284 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-03-10 22:01:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:00,300 INFO L93 Difference]: Finished difference Result 1086 states and 3173 transitions. [2021-03-10 22:01:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:01:00,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:00,302 INFO L225 Difference]: With dead ends: 1086 [2021-03-10 22:01:00,302 INFO L226 Difference]: Without dead ends: 1043 [2021-03-10 22:01:00,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1787.6ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:01:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-03-10 22:01:00,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 563. [2021-03-10 22:01:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 3.2686832740213525) internal successors, (1837), 562 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:00,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1837 transitions. [2021-03-10 22:01:00,311 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1837 transitions. Word has length 19 [2021-03-10 22:01:00,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:00,311 INFO L480 AbstractCegarLoop]: Abstraction has 563 states and 1837 transitions. [2021-03-10 22:01:00,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1837 transitions. [2021-03-10 22:01:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:00,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:00,311 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:00,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1326 [2021-03-10 22:01:00,515 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:00,516 INFO L82 PathProgramCache]: Analyzing trace with hash -948767486, now seen corresponding path program 70 times [2021-03-10 22:01:00,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:00,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608305946] [2021-03-10 22:01:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:00,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608305946] [2021-03-10 22:01:00,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057389689] [2021-03-10 22:01:00,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:00,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:00,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:00,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:00,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:00,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:00,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:00,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:00,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:00,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:00,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:00,859 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:00,862 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:00,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:00,869 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:00,873 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:00,877 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:00,880 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:00,884 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:00,887 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:00,891 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:00,894 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:00,897 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:00,901 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:01,104 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:01:01,104 INFO L628 ElimStorePlain]: treesize reduction 76, result has 74.5 percent of original size [2021-03-10 22:01:01,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:01:01,106 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:01:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:01,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:01,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:01,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943438557] [2021-03-10 22:01:01,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:01,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:01,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:01,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:01,387 INFO L87 Difference]: Start difference. First operand 563 states and 1837 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:01,786 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-10 22:01:02,034 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 22:01:02,312 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 22:01:02,526 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:01:02,672 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-03-10 22:01:02,855 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-03-10 22:01:03,018 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2021-03-10 22:01:03,192 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-03-10 22:01:03,368 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 22:01:03,550 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-03-10 22:01:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:03,589 INFO L93 Difference]: Finished difference Result 1077 states and 3172 transitions. [2021-03-10 22:01:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:01:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:03,592 INFO L225 Difference]: With dead ends: 1077 [2021-03-10 22:01:03,592 INFO L226 Difference]: Without dead ends: 1041 [2021-03-10 22:01:03,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2349.1ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:01:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-03-10 22:01:03,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 563. [2021-03-10 22:01:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 3.2651245551601424) internal successors, (1835), 562 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1835 transitions. [2021-03-10 22:01:03,605 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1835 transitions. Word has length 19 [2021-03-10 22:01:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:03,605 INFO L480 AbstractCegarLoop]: Abstraction has 563 states and 1835 transitions. [2021-03-10 22:01:03,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1835 transitions. [2021-03-10 22:01:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:03,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:03,606 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:03,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-03-10 22:01:03,807 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2074185700, now seen corresponding path program 71 times [2021-03-10 22:01:03,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:03,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575761125] [2021-03-10 22:01:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:03,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575761125] [2021-03-10 22:01:03,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890762946] [2021-03-10 22:01:03,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:03,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:03,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:04,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:04,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:04,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:04,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:04,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:04,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:04,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:04,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:04,150 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:76, output treesize:35 [2021-03-10 22:01:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:04,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:04,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:04,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385240685] [2021-03-10 22:01:04,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:04,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:04,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:04,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:04,208 INFO L87 Difference]: Start difference. First operand 563 states and 1835 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:04,734 INFO L93 Difference]: Finished difference Result 832 states and 2524 transitions. [2021-03-10 22:01:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:01:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:04,736 INFO L225 Difference]: With dead ends: 832 [2021-03-10 22:01:04,736 INFO L226 Difference]: Without dead ends: 803 [2021-03-10 22:01:04,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-03-10 22:01:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 567. [2021-03-10 22:01:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.26678445229682) internal successors, (1849), 566 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1849 transitions. [2021-03-10 22:01:04,742 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1849 transitions. Word has length 19 [2021-03-10 22:01:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:04,742 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1849 transitions. [2021-03-10 22:01:04,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1849 transitions. [2021-03-10 22:01:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:04,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:04,743 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:04,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1365,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:04,944 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash 780343278, now seen corresponding path program 72 times [2021-03-10 22:01:04,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:04,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601588873] [2021-03-10 22:01:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:05,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601588873] [2021-03-10 22:01:05,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580755413] [2021-03-10 22:01:05,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:05,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:05,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:05,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:05,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:05,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:05,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:05,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:05,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:05,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:05,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:05,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:05,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:05,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:05,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:05,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:05,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:05,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:05,232 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:05,285 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 22:01:05,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:05,286 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:266, output treesize:67 [2021-03-10 22:01:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:05,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:05,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:05,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16900624] [2021-03-10 22:01:05,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:05,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:05,387 INFO L87 Difference]: Start difference. First operand 567 states and 1849 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:05,911 INFO L93 Difference]: Finished difference Result 840 states and 2552 transitions. [2021-03-10 22:01:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:01:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:05,912 INFO L225 Difference]: With dead ends: 840 [2021-03-10 22:01:05,912 INFO L226 Difference]: Without dead ends: 812 [2021-03-10 22:01:05,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 582.1ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:01:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-03-10 22:01:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 567. [2021-03-10 22:01:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.26678445229682) internal successors, (1849), 566 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1849 transitions. [2021-03-10 22:01:05,919 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1849 transitions. Word has length 19 [2021-03-10 22:01:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:05,919 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1849 transitions. [2021-03-10 22:01:05,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1849 transitions. [2021-03-10 22:01:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:05,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:05,920 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:06,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-03-10 22:01:06,120 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1365827482, now seen corresponding path program 73 times [2021-03-10 22:01:06,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:06,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722079168] [2021-03-10 22:01:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:06,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722079168] [2021-03-10 22:01:06,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559128562] [2021-03-10 22:01:06,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:06,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:06,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:06,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:06,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:06,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:06,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:06,424 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:06,427 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:06,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,493 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:01:06,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:06,494 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:254, output treesize:67 [2021-03-10 22:01:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:06,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:06,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:01:06,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623698232] [2021-03-10 22:01:06,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:01:06,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:01:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:01:06,585 INFO L87 Difference]: Start difference. First operand 567 states and 1849 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:06,989 INFO L93 Difference]: Finished difference Result 781 states and 2432 transitions. [2021-03-10 22:01:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:01:06,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:06,990 INFO L225 Difference]: With dead ends: 781 [2021-03-10 22:01:06,990 INFO L226 Difference]: Without dead ends: 753 [2021-03-10 22:01:06,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 492.2ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:06,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-03-10 22:01:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 567. [2021-03-10 22:01:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.26678445229682) internal successors, (1849), 566 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1849 transitions. [2021-03-10 22:01:06,997 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1849 transitions. Word has length 19 [2021-03-10 22:01:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:06,997 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1849 transitions. [2021-03-10 22:01:06,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1849 transitions. [2021-03-10 22:01:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:06,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:06,998 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:07,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1394,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:07,198 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:07,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:07,198 INFO L82 PathProgramCache]: Analyzing trace with hash -255608602, now seen corresponding path program 74 times [2021-03-10 22:01:07,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:07,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240200852] [2021-03-10 22:01:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:07,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240200852] [2021-03-10 22:01:07,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345363507] [2021-03-10 22:01:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:07,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:07,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:07,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:07,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:07,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:07,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:07,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:07,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:07,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:07,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:07,561 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:01:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:07,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:07,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:07,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578073680] [2021-03-10 22:01:07,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:07,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:07,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:07,615 INFO L87 Difference]: Start difference. First operand 567 states and 1849 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:08,023 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 22:01:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:08,289 INFO L93 Difference]: Finished difference Result 893 states and 2685 transitions. [2021-03-10 22:01:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:08,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:08,290 INFO L225 Difference]: With dead ends: 893 [2021-03-10 22:01:08,290 INFO L226 Difference]: Without dead ends: 864 [2021-03-10 22:01:08,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 718.7ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-03-10 22:01:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 568. [2021-03-10 22:01:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.271604938271605) internal successors, (1855), 567 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1855 transitions. [2021-03-10 22:01:08,297 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1855 transitions. Word has length 19 [2021-03-10 22:01:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:08,297 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 1855 transitions. [2021-03-10 22:01:08,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1855 transitions. [2021-03-10 22:01:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:08,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:08,298 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:08,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-03-10 22:01:08,507 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:08,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1696046920, now seen corresponding path program 75 times [2021-03-10 22:01:08,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:08,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295785941] [2021-03-10 22:01:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:08,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295785941] [2021-03-10 22:01:08,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892418523] [2021-03-10 22:01:08,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:08,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:08,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:08,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:08,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:08,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:08,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:08,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:08,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:08,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:08,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:08,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:08,864 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:08,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:08,867 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:08,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:08,870 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:08,923 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 22:01:08,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:08,924 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:266, output treesize:67 [2021-03-10 22:01:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:09,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:09,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:09,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32735917] [2021-03-10 22:01:09,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:09,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:09,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:09,030 INFO L87 Difference]: Start difference. First operand 568 states and 1855 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,437 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 22:01:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:09,845 INFO L93 Difference]: Finished difference Result 957 states and 2836 transitions. [2021-03-10 22:01:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:01:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:09,853 INFO L225 Difference]: With dead ends: 957 [2021-03-10 22:01:09,853 INFO L226 Difference]: Without dead ends: 907 [2021-03-10 22:01:09,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 829.8ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:01:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-03-10 22:01:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 570. [2021-03-10 22:01:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.275922671353251) internal successors, (1864), 569 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1864 transitions. [2021-03-10 22:01:09,860 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1864 transitions. Word has length 19 [2021-03-10 22:01:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:09,861 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1864 transitions. [2021-03-10 22:01:09,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1864 transitions. [2021-03-10 22:01:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:09,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:09,861 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:10,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1422,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:10,062 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:10,062 INFO L82 PathProgramCache]: Analyzing trace with hash 927157478, now seen corresponding path program 76 times [2021-03-10 22:01:10,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:10,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383978452] [2021-03-10 22:01:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:10,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383978452] [2021-03-10 22:01:10,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707406963] [2021-03-10 22:01:10,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:10,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:10,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:10,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:10,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:10,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:10,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:10,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:10,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:10,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:10,396 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:10,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:10,402 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,464 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:01:10,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:10,465 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:218, output treesize:81 [2021-03-10 22:01:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:10,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:10,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:10,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435550872] [2021-03-10 22:01:10,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:10,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:10,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:10,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:10,568 INFO L87 Difference]: Start difference. First operand 570 states and 1864 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,204 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-03-10 22:01:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:11,658 INFO L93 Difference]: Finished difference Result 984 states and 2887 transitions. [2021-03-10 22:01:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:01:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:11,660 INFO L225 Difference]: With dead ends: 984 [2021-03-10 22:01:11,661 INFO L226 Difference]: Without dead ends: 940 [2021-03-10 22:01:11,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1101.4ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:01:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-03-10 22:01:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 568. [2021-03-10 22:01:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.271604938271605) internal successors, (1855), 567 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1855 transitions. [2021-03-10 22:01:11,668 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1855 transitions. Word has length 19 [2021-03-10 22:01:11,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:11,668 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 1855 transitions. [2021-03-10 22:01:11,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1855 transitions. [2021-03-10 22:01:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:11,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:11,669 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:11,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-03-10 22:01:11,870 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:11,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1788432346, now seen corresponding path program 77 times [2021-03-10 22:01:11,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:11,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082076391] [2021-03-10 22:01:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:11,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082076391] [2021-03-10 22:01:11,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712579604] [2021-03-10 22:01:11,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:12,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:12,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:12,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:12,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:12,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:12,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:12,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:12,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:12,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:12,207 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:12,211 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:12,214 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:12,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:12,222 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:12,226 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:12,229 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:12,232 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:12,236 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:12,239 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,418 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:01:12,418 INFO L628 ElimStorePlain]: treesize reduction 41, result has 84.4 percent of original size [2021-03-10 22:01:12,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:01:12,420 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-03-10 22:01:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:12,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:12,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:12,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129758316] [2021-03-10 22:01:12,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:12,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:12,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:12,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:12,631 INFO L87 Difference]: Start difference. First operand 568 states and 1855 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,609 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-03-10 22:01:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:13,625 INFO L93 Difference]: Finished difference Result 1062 states and 3111 transitions. [2021-03-10 22:01:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:01:13,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:13,628 INFO L225 Difference]: With dead ends: 1062 [2021-03-10 22:01:13,628 INFO L226 Difference]: Without dead ends: 1012 [2021-03-10 22:01:13,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1090.5ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:01:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-03-10 22:01:13,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 572. [2021-03-10 22:01:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 3.285464098073555) internal successors, (1876), 571 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1876 transitions. [2021-03-10 22:01:13,636 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1876 transitions. Word has length 19 [2021-03-10 22:01:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:13,636 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1876 transitions. [2021-03-10 22:01:13,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1876 transitions. [2021-03-10 22:01:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:13,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:13,637 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:13,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1458 [2021-03-10 22:01:13,837 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:13,838 INFO L82 PathProgramCache]: Analyzing trace with hash -496089946, now seen corresponding path program 78 times [2021-03-10 22:01:13,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:13,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021462055] [2021-03-10 22:01:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:13,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021462055] [2021-03-10 22:01:13,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525031384] [2021-03-10 22:01:13,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:14,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:14,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:14,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:14,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:14,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:14,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:14,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:14,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:14,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:14,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:14,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:14,161 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:14,164 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:14,168 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:14,172 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:14,175 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:14,179 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:14,183 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:14,186 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:14,190 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:14,193 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:14,197 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:14,200 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,386 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:01:14,386 INFO L628 ElimStorePlain]: treesize reduction 66, result has 77.1 percent of original size [2021-03-10 22:01:14,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:01:14,388 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:01:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:14,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:14,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:14,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624442567] [2021-03-10 22:01:14,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:14,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:14,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:14,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:14,649 INFO L87 Difference]: Start difference. First operand 572 states and 1876 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:15,049 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 22:01:15,246 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-03-10 22:01:15,474 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:01:15,732 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 22:01:15,914 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 22:01:16,174 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 22:01:16,378 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-03-10 22:01:16,549 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 22:01:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:16,908 INFO L93 Difference]: Finished difference Result 1068 states and 3115 transitions. [2021-03-10 22:01:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:01:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:16,910 INFO L225 Difference]: With dead ends: 1068 [2021-03-10 22:01:16,910 INFO L226 Difference]: Without dead ends: 1025 [2021-03-10 22:01:16,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2325.1ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:01:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-03-10 22:01:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 572. [2021-03-10 22:01:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 3.2819614711033274) internal successors, (1874), 571 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1874 transitions. [2021-03-10 22:01:16,918 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1874 transitions. Word has length 19 [2021-03-10 22:01:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:16,918 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1874 transitions. [2021-03-10 22:01:16,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1874 transitions. [2021-03-10 22:01:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:16,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:16,919 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:17,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1479 [2021-03-10 22:01:17,120 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:17,120 INFO L82 PathProgramCache]: Analyzing trace with hash 65191608, now seen corresponding path program 79 times [2021-03-10 22:01:17,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:17,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347528224] [2021-03-10 22:01:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:17,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347528224] [2021-03-10 22:01:17,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571040086] [2021-03-10 22:01:17,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:17,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:17,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:17,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:17,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:17,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:17,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:17,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:17,458 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:17,461 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:17,464 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:17,467 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:17,470 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:17,473 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:17,476 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:17,479 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,545 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-03-10 22:01:17,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:17,546 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 22:01:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:17,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:17,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:01:17,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509838938] [2021-03-10 22:01:17,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:01:17,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:01:17,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:01:17,635 INFO L87 Difference]: Start difference. First operand 572 states and 1874 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:18,046 INFO L93 Difference]: Finished difference Result 810 states and 2513 transitions. [2021-03-10 22:01:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:18,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:18,047 INFO L225 Difference]: With dead ends: 810 [2021-03-10 22:01:18,047 INFO L226 Difference]: Without dead ends: 767 [2021-03-10 22:01:18,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 533.0ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:01:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-03-10 22:01:18,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 575. [2021-03-10 22:01:18,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.2909407665505226) internal successors, (1889), 574 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1889 transitions. [2021-03-10 22:01:18,054 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1889 transitions. Word has length 19 [2021-03-10 22:01:18,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:18,054 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1889 transitions. [2021-03-10 22:01:18,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1889 transitions. [2021-03-10 22:01:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:18,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:18,055 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:18,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1501,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:18,256 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:18,256 INFO L82 PathProgramCache]: Analyzing trace with hash 816592046, now seen corresponding path program 80 times [2021-03-10 22:01:18,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:18,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273734985] [2021-03-10 22:01:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:18,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273734985] [2021-03-10 22:01:18,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414726367] [2021-03-10 22:01:18,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:18,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:18,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:18,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:18,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:18,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:18,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:18,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:18,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:18,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:18,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:18,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:18,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:18,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:18,617 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:18,620 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:18,624 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:18,627 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:18,630 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:18,813 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:01:18,813 INFO L628 ElimStorePlain]: treesize reduction 41, result has 84.4 percent of original size [2021-03-10 22:01:18,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:01:18,815 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:577, output treesize:222 [2021-03-10 22:01:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:19,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:19,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:19,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318076642] [2021-03-10 22:01:19,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:19,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:19,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:19,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:19,026 INFO L87 Difference]: Start difference. First operand 575 states and 1889 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,421 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 22:01:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:19,883 INFO L93 Difference]: Finished difference Result 1015 states and 3003 transitions. [2021-03-10 22:01:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:01:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:19,885 INFO L225 Difference]: With dead ends: 1015 [2021-03-10 22:01:19,885 INFO L226 Difference]: Without dead ends: 972 [2021-03-10 22:01:19,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1041.8ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:01:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-03-10 22:01:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 578. [2021-03-10 22:01:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 3.299826689774697) internal successors, (1904), 577 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1904 transitions. [2021-03-10 22:01:19,893 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1904 transitions. Word has length 19 [2021-03-10 22:01:19,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:19,893 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 1904 transitions. [2021-03-10 22:01:19,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,894 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1904 transitions. [2021-03-10 22:01:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:19,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:19,894 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:20,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1517,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:20,095 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:20,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:20,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2108934446, now seen corresponding path program 81 times [2021-03-10 22:01:20,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:20,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200005735] [2021-03-10 22:01:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:20,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200005735] [2021-03-10 22:01:20,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257110867] [2021-03-10 22:01:20,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:20,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:20,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:20,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:20,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:20,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:20,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:20,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:20,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:20,416 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:20,420 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:20,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:20,427 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:20,431 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:20,436 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:20,439 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:20,443 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:20,447 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:20,450 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:20,454 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:20,458 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:20,462 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:20,465 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:20,469 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:20,472 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:20,476 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:20,479 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:20,482 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:20,659 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:01:20,660 INFO L628 ElimStorePlain]: treesize reduction 72, result has 75.5 percent of original size [2021-03-10 22:01:20,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:01:20,661 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1063, output treesize:222 [2021-03-10 22:01:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:20,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:20,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:20,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310228184] [2021-03-10 22:01:20,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:20,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:20,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:20,924 INFO L87 Difference]: Start difference. First operand 578 states and 1904 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:21,330 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-10 22:01:21,776 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:01:21,953 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 22:01:22,219 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:01:22,347 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 22:01:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:22,383 INFO L93 Difference]: Finished difference Result 942 states and 2840 transitions. [2021-03-10 22:01:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:01:22,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:22,384 INFO L225 Difference]: With dead ends: 942 [2021-03-10 22:01:22,385 INFO L226 Difference]: Without dead ends: 920 [2021-03-10 22:01:22,385 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1648.5ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:01:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-03-10 22:01:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 572. [2021-03-10 22:01:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 3.2819614711033274) internal successors, (1874), 571 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1874 transitions. [2021-03-10 22:01:22,392 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1874 transitions. Word has length 19 [2021-03-10 22:01:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:22,392 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1874 transitions. [2021-03-10 22:01:22,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1874 transitions. [2021-03-10 22:01:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:22,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:22,393 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:22,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1537,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:22,593 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1568513078, now seen corresponding path program 82 times [2021-03-10 22:01:22,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:22,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476239629] [2021-03-10 22:01:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:22,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476239629] [2021-03-10 22:01:22,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820716134] [2021-03-10 22:01:22,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:22,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:22,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:22,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:22,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:22,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:22,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:22,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:22,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:22,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:22,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:76, output treesize:35 [2021-03-10 22:01:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:23,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:23,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:23,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049534555] [2021-03-10 22:01:23,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:23,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:23,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:23,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:23,006 INFO L87 Difference]: Start difference. First operand 572 states and 1874 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:23,649 INFO L93 Difference]: Finished difference Result 952 states and 2892 transitions. [2021-03-10 22:01:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:23,651 INFO L225 Difference]: With dead ends: 952 [2021-03-10 22:01:23,651 INFO L226 Difference]: Without dead ends: 912 [2021-03-10 22:01:23,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 747.8ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-03-10 22:01:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 572. [2021-03-10 22:01:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 3.273204903677758) internal successors, (1869), 571 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1869 transitions. [2021-03-10 22:01:23,658 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1869 transitions. Word has length 19 [2021-03-10 22:01:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:23,658 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1869 transitions. [2021-03-10 22:01:23,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1869 transitions. [2021-03-10 22:01:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:23,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:23,659 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:23,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-03-10 22:01:23,860 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:23,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2032632552, now seen corresponding path program 83 times [2021-03-10 22:01:23,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:23,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525513469] [2021-03-10 22:01:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:23,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525513469] [2021-03-10 22:01:23,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615793197] [2021-03-10 22:01:23,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:24,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:24,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:24,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:24,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:24,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:24,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:24,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:24,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:24,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:24,231 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:01:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:24,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:24,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:24,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615740780] [2021-03-10 22:01:24,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:24,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:24,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:24,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:24,279 INFO L87 Difference]: Start difference. First operand 572 states and 1869 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,930 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 22:01:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:24,950 INFO L93 Difference]: Finished difference Result 920 states and 2827 transitions. [2021-03-10 22:01:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:24,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:24,952 INFO L225 Difference]: With dead ends: 920 [2021-03-10 22:01:24,953 INFO L226 Difference]: Without dead ends: 891 [2021-03-10 22:01:24,953 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-03-10 22:01:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 575. [2021-03-10 22:01:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.270034843205575) internal successors, (1877), 574 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1877 transitions. [2021-03-10 22:01:24,960 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1877 transitions. Word has length 19 [2021-03-10 22:01:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:24,960 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1877 transitions. [2021-03-10 22:01:24,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,961 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1877 transitions. [2021-03-10 22:01:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:24,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:24,961 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:25,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1572 [2021-03-10 22:01:25,162 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:25,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:25,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1159146314, now seen corresponding path program 84 times [2021-03-10 22:01:25,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:25,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406250671] [2021-03-10 22:01:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406250671] [2021-03-10 22:01:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548210968] [2021-03-10 22:01:25,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:25,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:25,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:25,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:25,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:25,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:25,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:25,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:25,527 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:25,530 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:25,537 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:25,540 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:25,543 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:25,546 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:25,549 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:25,552 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:25,611 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-03-10 22:01:25,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:25,612 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:472, output treesize:67 [2021-03-10 22:01:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:25,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:25,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:25,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921299534] [2021-03-10 22:01:25,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:25,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:25,708 INFO L87 Difference]: Start difference. First operand 575 states and 1877 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,286 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-10 22:01:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:26,619 INFO L93 Difference]: Finished difference Result 984 states and 2971 transitions. [2021-03-10 22:01:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:26,621 INFO L225 Difference]: With dead ends: 984 [2021-03-10 22:01:26,621 INFO L226 Difference]: Without dead ends: 934 [2021-03-10 22:01:26,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1036.0ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-03-10 22:01:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 575. [2021-03-10 22:01:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.275261324041812) internal successors, (1880), 574 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1880 transitions. [2021-03-10 22:01:26,628 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1880 transitions. Word has length 19 [2021-03-10 22:01:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:26,628 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1880 transitions. [2021-03-10 22:01:26,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1880 transitions. [2021-03-10 22:01:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:26,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:26,629 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:26,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:26,829 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:26,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:26,829 INFO L82 PathProgramCache]: Analyzing trace with hash 653498678, now seen corresponding path program 85 times [2021-03-10 22:01:26,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:26,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767244924] [2021-03-10 22:01:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:26,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767244924] [2021-03-10 22:01:26,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625408229] [2021-03-10 22:01:26,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:26,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:26,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:27,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:27,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:27,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:27,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:27,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:27,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:27,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:27,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:27,211 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:76, output treesize:35 [2021-03-10 22:01:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:27,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:27,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:27,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018976946] [2021-03-10 22:01:27,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:27,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:27,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:27,259 INFO L87 Difference]: Start difference. First operand 575 states and 1880 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:27,687 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 22:01:27,880 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-10 22:01:28,027 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-03-10 22:01:28,230 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 22:01:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:28,249 INFO L93 Difference]: Finished difference Result 1005 states and 3033 transitions. [2021-03-10 22:01:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:28,250 INFO L225 Difference]: With dead ends: 1005 [2021-03-10 22:01:28,251 INFO L226 Difference]: Without dead ends: 976 [2021-03-10 22:01:28,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1066.5ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-03-10 22:01:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 579. [2021-03-10 22:01:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 3.2768166089965396) internal successors, (1894), 578 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1894 transitions. [2021-03-10 22:01:28,258 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1894 transitions. Word has length 19 [2021-03-10 22:01:28,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:28,258 INFO L480 AbstractCegarLoop]: Abstraction has 579 states and 1894 transitions. [2021-03-10 22:01:28,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:28,258 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1894 transitions. [2021-03-10 22:01:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:28,259 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:28,259 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:28,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1599 [2021-03-10 22:01:28,459 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash -113347470, now seen corresponding path program 86 times [2021-03-10 22:01:28,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:28,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992351969] [2021-03-10 22:01:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:28,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992351969] [2021-03-10 22:01:28,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625862721] [2021-03-10 22:01:28,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:28,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:28,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:28,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:28,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:28,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:28,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:28,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:28,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:28,822 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:28,824 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,886 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:01:28,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:28,888 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 22:01:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:28,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:28,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:28,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465782995] [2021-03-10 22:01:28,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:28,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:28,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:28,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:28,993 INFO L87 Difference]: Start difference. First operand 579 states and 1894 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:29,405 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 22:01:29,604 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-10 22:01:29,857 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-03-10 22:01:30,046 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-03-10 22:01:30,246 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-03-10 22:01:30,449 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-03-10 22:01:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:30,477 INFO L93 Difference]: Finished difference Result 1063 states and 3160 transitions. [2021-03-10 22:01:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:30,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:30,479 INFO L225 Difference]: With dead ends: 1063 [2021-03-10 22:01:30,479 INFO L226 Difference]: Without dead ends: 1019 [2021-03-10 22:01:30,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1565.8ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-03-10 22:01:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 575. [2021-03-10 22:01:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.275261324041812) internal successors, (1880), 574 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1880 transitions. [2021-03-10 22:01:30,487 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1880 transitions. Word has length 19 [2021-03-10 22:01:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:30,487 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1880 transitions. [2021-03-10 22:01:30,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1880 transitions. [2021-03-10 22:01:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:30,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:30,488 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:30,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1612 [2021-03-10 22:01:30,688 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash -637536650, now seen corresponding path program 87 times [2021-03-10 22:01:30,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:30,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781481444] [2021-03-10 22:01:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:30,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781481444] [2021-03-10 22:01:30,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687761668] [2021-03-10 22:01:30,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:30,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:30,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:30,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:30,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:31,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:31,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:31,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:31,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:31,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:31,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:31,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:01:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:31,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:31,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:31,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45148479] [2021-03-10 22:01:31,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:31,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:31,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:31,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:31,147 INFO L87 Difference]: Start difference. First operand 575 states and 1880 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:31,565 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-03-10 22:01:31,913 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-10 22:01:31,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:31,933 INFO L93 Difference]: Finished difference Result 959 states and 2940 transitions. [2021-03-10 22:01:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:31,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:31,935 INFO L225 Difference]: With dead ends: 959 [2021-03-10 22:01:31,935 INFO L226 Difference]: Without dead ends: 930 [2021-03-10 22:01:31,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 869.1ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-03-10 22:01:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 579. [2021-03-10 22:01:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 3.2768166089965396) internal successors, (1894), 578 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1894 transitions. [2021-03-10 22:01:31,942 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1894 transitions. Word has length 19 [2021-03-10 22:01:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:31,943 INFO L480 AbstractCegarLoop]: Abstraction has 579 states and 1894 transitions. [2021-03-10 22:01:31,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1894 transitions. [2021-03-10 22:01:31,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:31,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:31,943 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:32,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1626,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:32,144 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1511022888, now seen corresponding path program 88 times [2021-03-10 22:01:32,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:32,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451053331] [2021-03-10 22:01:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:32,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451053331] [2021-03-10 22:01:32,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116137354] [2021-03-10 22:01:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:32,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:32,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:32,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:32,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:32,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:32,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:32,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:32,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:32,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:32,544 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:32,547 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:32,550 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:32,554 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:32,557 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:32,560 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:32,562 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:32,620 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:01:32,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:32,621 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:426, output treesize:67 [2021-03-10 22:01:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:32,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:32,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:32,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934884390] [2021-03-10 22:01:32,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:32,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:32,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:32,719 INFO L87 Difference]: Start difference. First operand 579 states and 1894 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,358 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-03-10 22:01:33,619 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 22:01:33,743 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-03-10 22:01:33,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:33,774 INFO L93 Difference]: Finished difference Result 1023 states and 3084 transitions. [2021-03-10 22:01:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:33,776 INFO L225 Difference]: With dead ends: 1023 [2021-03-10 22:01:33,776 INFO L226 Difference]: Without dead ends: 973 [2021-03-10 22:01:33,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1171.7ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:33,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-03-10 22:01:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 578. [2021-03-10 22:01:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 3.2842287694974) internal successors, (1895), 577 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1895 transitions. [2021-03-10 22:01:33,784 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1895 transitions. Word has length 19 [2021-03-10 22:01:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:33,784 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 1895 transitions. [2021-03-10 22:01:33,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1895 transitions. [2021-03-10 22:01:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:33,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:33,785 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:33,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1634 [2021-03-10 22:01:33,988 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:33,988 INFO L82 PathProgramCache]: Analyzing trace with hash 545229430, now seen corresponding path program 89 times [2021-03-10 22:01:33,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:33,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644974903] [2021-03-10 22:01:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:34,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644974903] [2021-03-10 22:01:34,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673059973] [2021-03-10 22:01:34,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:34,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:34,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:34,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:34,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:34,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:34,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:34,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:34,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:34,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:34,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:34,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:34,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:34,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:34,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:34,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:34,363 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:34,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:34,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:34,442 INFO L628 ElimStorePlain]: treesize reduction 45, result has 67.6 percent of original size [2021-03-10 22:01:34,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:01:34,443 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:196, output treesize:94 [2021-03-10 22:01:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:34,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:34,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:34,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4002487] [2021-03-10 22:01:34,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:34,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:34,551 INFO L87 Difference]: Start difference. First operand 578 states and 1895 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:35,097 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-03-10 22:01:35,333 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-10 22:01:35,502 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-03-10 22:01:35,666 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 22:01:35,846 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 22:01:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:35,874 INFO L93 Difference]: Finished difference Result 1020 states and 3075 transitions. [2021-03-10 22:01:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:35,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:35,876 INFO L225 Difference]: With dead ends: 1020 [2021-03-10 22:01:35,876 INFO L226 Difference]: Without dead ends: 976 [2021-03-10 22:01:35,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1419.3ms TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-03-10 22:01:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 578. [2021-03-10 22:01:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 3.2842287694974) internal successors, (1895), 577 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1895 transitions. [2021-03-10 22:01:35,883 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1895 transitions. Word has length 19 [2021-03-10 22:01:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:35,883 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 1895 transitions. [2021-03-10 22:01:35,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1895 transitions. [2021-03-10 22:01:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:35,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:35,884 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:36,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1654,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:36,085 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1603408314, now seen corresponding path program 90 times [2021-03-10 22:01:36,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:36,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345684053] [2021-03-10 22:01:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:36,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345684053] [2021-03-10 22:01:36,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395602058] [2021-03-10 22:01:36,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:36,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:36,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:36,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:36,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:36,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:36,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:36,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:36,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:36,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:36,444 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:36,449 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:36,453 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:36,457 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:36,461 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:36,466 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:36,470 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:36,474 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:36,478 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:36,482 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:36,487 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:36,491 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:36,494 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:36,498 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:36,501 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:36,505 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:36,508 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:36,512 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:36,515 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,708 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 22:01:36,708 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-03-10 22:01:36,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:01:36,710 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-03-10 22:01:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:36,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:36,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:36,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797080352] [2021-03-10 22:01:36,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:36,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:36,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:36,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:36,927 INFO L87 Difference]: Start difference. First operand 578 states and 1895 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:37,634 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-10 22:01:37,778 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-03-10 22:01:38,069 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-03-10 22:01:38,222 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-10 22:01:38,338 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2021-03-10 22:01:38,495 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 22:01:38,619 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 22:01:38,808 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2021-03-10 22:01:38,997 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-03-10 22:01:39,446 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-03-10 22:01:39,609 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-10 22:01:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:39,609 INFO L93 Difference]: Finished difference Result 1168 states and 3432 transitions. [2021-03-10 22:01:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:01:39,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:39,612 INFO L225 Difference]: With dead ends: 1168 [2021-03-10 22:01:39,612 INFO L226 Difference]: Without dead ends: 1091 [2021-03-10 22:01:39,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2771.7ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:01:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-03-10 22:01:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 584. [2021-03-10 22:01:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 3.2984562607204118) internal successors, (1923), 583 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1923 transitions. [2021-03-10 22:01:39,620 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1923 transitions. Word has length 19 [2021-03-10 22:01:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:39,620 INFO L480 AbstractCegarLoop]: Abstraction has 584 states and 1923 transitions. [2021-03-10 22:01:39,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1923 transitions. [2021-03-10 22:01:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:39,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:39,621 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:39,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:39,822 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:39,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1163704780, now seen corresponding path program 91 times [2021-03-10 22:01:39,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:39,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078651019] [2021-03-10 22:01:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:40,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078651019] [2021-03-10 22:01:40,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058019406] [2021-03-10 22:01:40,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:40,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:40,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:40,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:40,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:40,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:40,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:40,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:40,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:40,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:40,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:40,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:40,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:40,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:40,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:40,278 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:40,342 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:01:40,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:40,344 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 22:01:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:40,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:40,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:01:40,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418904521] [2021-03-10 22:01:40,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:40,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:40,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:40,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:40,462 INFO L87 Difference]: Start difference. First operand 584 states and 1923 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:40,952 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-03-10 22:01:41,172 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-03-10 22:01:41,335 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2021-03-10 22:01:41,473 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-03-10 22:01:41,599 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-03-10 22:01:41,801 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2021-03-10 22:01:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:41,837 INFO L93 Difference]: Finished difference Result 966 states and 2909 transitions. [2021-03-10 22:01:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:41,837 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:41,839 INFO L225 Difference]: With dead ends: 966 [2021-03-10 22:01:41,839 INFO L226 Difference]: Without dead ends: 929 [2021-03-10 22:01:41,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1528.2ms TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:01:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-10 22:01:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 584. [2021-03-10 22:01:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 3.2984562607204118) internal successors, (1923), 583 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1923 transitions. [2021-03-10 22:01:41,847 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1923 transitions. Word has length 19 [2021-03-10 22:01:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:41,847 INFO L480 AbstractCegarLoop]: Abstraction has 584 states and 1923 transitions. [2021-03-10 22:01:41,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1923 transitions. [2021-03-10 22:01:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:41,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:41,852 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:42,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-03-10 22:01:42,060 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash -841308758, now seen corresponding path program 92 times [2021-03-10 22:01:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:42,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210837492] [2021-03-10 22:01:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:42,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210837492] [2021-03-10 22:01:42,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836882206] [2021-03-10 22:01:42,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:42,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:42,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:42,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:42,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:42,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:42,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:42,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:42,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:42,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:42,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:42,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:01:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:42,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:42,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:01:42,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412891461] [2021-03-10 22:01:42,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:01:42,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:01:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:42,398 INFO L87 Difference]: Start difference. First operand 584 states and 1923 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:42,801 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-03-10 22:01:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:43,262 INFO L93 Difference]: Finished difference Result 963 states and 2927 transitions. [2021-03-10 22:01:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:43,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:43,264 INFO L225 Difference]: With dead ends: 963 [2021-03-10 22:01:43,264 INFO L226 Difference]: Without dead ends: 899 [2021-03-10 22:01:43,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 882.2ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-03-10 22:01:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 620. [2021-03-10 22:01:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.2778675282714054) internal successors, (2029), 619 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2029 transitions. [2021-03-10 22:01:43,272 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2029 transitions. Word has length 19 [2021-03-10 22:01:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:43,272 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 2029 transitions. [2021-03-10 22:01:43,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2029 transitions. [2021-03-10 22:01:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:43,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:43,273 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:43,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1699,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:43,474 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:43,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1960185702, now seen corresponding path program 93 times [2021-03-10 22:01:43,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:43,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820488224] [2021-03-10 22:01:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:43,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820488224] [2021-03-10 22:01:43,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342151496] [2021-03-10 22:01:43,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:43,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:43,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:43,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:43,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:43,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:43,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:43,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:43,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:43,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:43,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:43,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:01:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:43,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:43,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:43,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005182458] [2021-03-10 22:01:43,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:43,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:43,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:43,907 INFO L87 Difference]: Start difference. First operand 620 states and 2029 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,271 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-03-10 22:01:44,591 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 22:01:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:44,614 INFO L93 Difference]: Finished difference Result 953 states and 2933 transitions. [2021-03-10 22:01:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:44,617 INFO L225 Difference]: With dead ends: 953 [2021-03-10 22:01:44,617 INFO L226 Difference]: Without dead ends: 924 [2021-03-10 22:01:44,617 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 799.9ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-03-10 22:01:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 620. [2021-03-10 22:01:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.273021001615509) internal successors, (2026), 619 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2026 transitions. [2021-03-10 22:01:44,624 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2026 transitions. Word has length 19 [2021-03-10 22:01:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:44,624 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 2026 transitions. [2021-03-10 22:01:44,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2026 transitions. [2021-03-10 22:01:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:44,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:44,625 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:44,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1710,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:44,826 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:44,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1086699464, now seen corresponding path program 94 times [2021-03-10 22:01:44,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:44,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211269033] [2021-03-10 22:01:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:44,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211269033] [2021-03-10 22:01:44,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482719477] [2021-03-10 22:01:44,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:45,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:45,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:45,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:45,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:45,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:45,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:45,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:45,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:45,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:45,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:45,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:45,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:45,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:45,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:45,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:45,244 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:45,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:45,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:45,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:45,250 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:45,308 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-03-10 22:01:45,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:45,309 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:01:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:45,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:45,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:45,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746875132] [2021-03-10 22:01:45,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:45,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:45,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:45,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:45,413 INFO L87 Difference]: Start difference. First operand 620 states and 2026 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:45,763 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-03-10 22:01:46,033 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:01:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:46,360 INFO L93 Difference]: Finished difference Result 1017 states and 3077 transitions. [2021-03-10 22:01:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:46,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:46,362 INFO L225 Difference]: With dead ends: 1017 [2021-03-10 22:01:46,362 INFO L226 Difference]: Without dead ends: 967 [2021-03-10 22:01:46,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1060.5ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:46,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-03-10 22:01:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 621. [2021-03-10 22:01:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 3.2806451612903227) internal successors, (2034), 620 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 2034 transitions. [2021-03-10 22:01:46,370 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 2034 transitions. Word has length 19 [2021-03-10 22:01:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:46,370 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 2034 transitions. [2021-03-10 22:01:46,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 2034 transitions. [2021-03-10 22:01:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:46,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:46,371 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:46,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1718,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:46,571 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:46,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1152015514, now seen corresponding path program 95 times [2021-03-10 22:01:46,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:46,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941014250] [2021-03-10 22:01:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:46,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941014250] [2021-03-10 22:01:46,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454345826] [2021-03-10 22:01:46,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:46,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:46,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:46,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:46,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:46,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:46,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:46,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:46,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:46,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:46,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:46,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:46,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:46,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:46,927 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:46,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:46,930 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:46,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:46,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:46,995 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:01:46,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:46,996 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 22:01:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:47,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:47,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:01:47,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692671968] [2021-03-10 22:01:47,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:01:47,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:47,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:01:47,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:47,095 INFO L87 Difference]: Start difference. First operand 621 states and 2034 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:47,511 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 22:01:47,670 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-03-10 22:01:47,819 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-10 22:01:48,057 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-10 22:01:48,279 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-10 22:01:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:48,426 INFO L93 Difference]: Finished difference Result 1061 states and 3190 transitions. [2021-03-10 22:01:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:01:48,426 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:48,428 INFO L225 Difference]: With dead ends: 1061 [2021-03-10 22:01:48,428 INFO L226 Difference]: Without dead ends: 977 [2021-03-10 22:01:48,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1341.4ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:01:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-03-10 22:01:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 625. [2021-03-10 22:01:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.2884615384615383) internal successors, (2052), 624 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2052 transitions. [2021-03-10 22:01:48,436 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2052 transitions. Word has length 19 [2021-03-10 22:01:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:48,436 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 2052 transitions. [2021-03-10 22:01:48,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2052 transitions. [2021-03-10 22:01:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:48,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:48,437 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:48,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1735,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:48,637 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:48,638 INFO L82 PathProgramCache]: Analyzing trace with hash 994314038, now seen corresponding path program 96 times [2021-03-10 22:01:48,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:48,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026980647] [2021-03-10 22:01:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:48,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026980647] [2021-03-10 22:01:48,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082509993] [2021-03-10 22:01:48,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:48,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:48,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:48,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:48,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:48,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:48,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:48,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:48,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:48,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:48,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:48,986 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:48,990 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:48,993 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:48,997 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:49,000 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:49,004 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:49,007 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:49,010 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,188 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 22:01:49,188 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.7 percent of original size [2021-03-10 22:01:49,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:01:49,190 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-03-10 22:01:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:49,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:49,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:01:49,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525439667] [2021-03-10 22:01:49,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:49,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:49,418 INFO L87 Difference]: Start difference. First operand 625 states and 2052 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:49,778 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-03-10 22:01:50,142 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-10 22:01:50,281 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-03-10 22:01:50,578 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-10 22:01:50,717 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:01:50,993 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 22:01:51,274 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-03-10 22:01:51,414 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:01:51,559 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-10 22:01:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:51,795 INFO L93 Difference]: Finished difference Result 1163 states and 3428 transitions. [2021-03-10 22:01:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:01:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:51,797 INFO L225 Difference]: With dead ends: 1163 [2021-03-10 22:01:51,797 INFO L226 Difference]: Without dead ends: 1064 [2021-03-10 22:01:51,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2427.0ms TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:01:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-03-10 22:01:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 625. [2021-03-10 22:01:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.2884615384615383) internal successors, (2052), 624 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2052 transitions. [2021-03-10 22:01:51,806 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2052 transitions. Word has length 19 [2021-03-10 22:01:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:51,806 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 2052 transitions. [2021-03-10 22:01:51,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:51,806 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2052 transitions. [2021-03-10 22:01:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:51,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:51,807 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:52,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1751 [2021-03-10 22:01:52,007 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:52,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:52,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1064424074, now seen corresponding path program 97 times [2021-03-10 22:01:52,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:52,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662248471] [2021-03-10 22:01:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:52,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662248471] [2021-03-10 22:01:52,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278176125] [2021-03-10 22:01:52,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:52,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:52,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:52,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:52,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:52,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:52,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:52,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:52,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:52,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:52,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:52,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:52,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:52,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:52,316 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:52,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:52,319 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:52,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:52,322 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:52,426 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:01:52,426 INFO L628 ElimStorePlain]: treesize reduction 28, result has 82.6 percent of original size [2021-03-10 22:01:52,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:01:52,428 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-03-10 22:01:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:52,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:52,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:52,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162415398] [2021-03-10 22:01:52,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:52,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:52,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:52,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:52,705 INFO L87 Difference]: Start difference. First operand 625 states and 2052 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:53,133 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:01:53,349 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-10 22:01:53,535 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 22:01:53,872 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-03-10 22:01:53,998 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-10 22:01:54,338 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-03-10 22:01:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:54,445 INFO L93 Difference]: Finished difference Result 1047 states and 3194 transitions. [2021-03-10 22:01:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:01:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:54,447 INFO L225 Difference]: With dead ends: 1047 [2021-03-10 22:01:54,447 INFO L226 Difference]: Without dead ends: 984 [2021-03-10 22:01:54,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1884.7ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:01:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-03-10 22:01:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 627. [2021-03-10 22:01:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 3.2731629392971247) internal successors, (2049), 626 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 2049 transitions. [2021-03-10 22:01:54,455 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 2049 transitions. Word has length 19 [2021-03-10 22:01:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:54,455 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 2049 transitions. [2021-03-10 22:01:54,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 2049 transitions. [2021-03-10 22:01:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:54,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:54,456 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:54,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1768,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:54,656 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1145795884, now seen corresponding path program 98 times [2021-03-10 22:01:54,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:54,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008546586] [2021-03-10 22:01:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:54,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008546586] [2021-03-10 22:01:54,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737226337] [2021-03-10 22:01:54,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:54,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:54,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:54,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:54,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:54,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:54,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:54,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:54,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:54,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:54,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:54,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:01:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:55,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:55,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:55,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110461224] [2021-03-10 22:01:55,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:55,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:55,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:55,020 INFO L87 Difference]: Start difference. First operand 627 states and 2049 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:55,575 INFO L93 Difference]: Finished difference Result 858 states and 2654 transitions. [2021-03-10 22:01:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:55,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:55,577 INFO L225 Difference]: With dead ends: 858 [2021-03-10 22:01:55,577 INFO L226 Difference]: Without dead ends: 829 [2021-03-10 22:01:55,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 577.9ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:01:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-03-10 22:01:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 632. [2021-03-10 22:01:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.277337559429477) internal successors, (2068), 631 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2068 transitions. [2021-03-10 22:01:55,584 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2068 transitions. Word has length 19 [2021-03-10 22:01:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:55,584 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 2068 transitions. [2021-03-10 22:01:55,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2068 transitions. [2021-03-10 22:01:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:55,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:55,585 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:55,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1786 [2021-03-10 22:01:55,786 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash -294642434, now seen corresponding path program 99 times [2021-03-10 22:01:55,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:55,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421416018] [2021-03-10 22:01:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:55,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421416018] [2021-03-10 22:01:55,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905795048] [2021-03-10 22:01:55,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:55,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:55,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:55,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:56,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:56,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:56,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:56,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:56,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:56,085 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:56,088 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:56,091 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:56,094 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:56,098 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:56,101 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:56,104 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:56,107 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,168 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-03-10 22:01:56,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:56,169 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 22:01:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:56,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:56,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:56,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642906440] [2021-03-10 22:01:56,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:56,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:56,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:56,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:56,266 INFO L87 Difference]: Start difference. First operand 632 states and 2068 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:56,827 INFO L93 Difference]: Finished difference Result 891 states and 2735 transitions. [2021-03-10 22:01:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:01:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:56,844 INFO L225 Difference]: With dead ends: 891 [2021-03-10 22:01:56,844 INFO L226 Difference]: Without dead ends: 841 [2021-03-10 22:01:56,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 617.3ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:01:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-03-10 22:01:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 632. [2021-03-10 22:01:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.277337559429477) internal successors, (2068), 631 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2068 transitions. [2021-03-10 22:01:56,852 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2068 transitions. Word has length 19 [2021-03-10 22:01:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:56,852 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 2068 transitions. [2021-03-10 22:01:56,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2068 transitions. [2021-03-10 22:01:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:56,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:56,853 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:57,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1797 [2021-03-10 22:01:57,054 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:57,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1854154102, now seen corresponding path program 100 times [2021-03-10 22:01:57,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:57,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572663888] [2021-03-10 22:01:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:57,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572663888] [2021-03-10 22:01:57,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387344361] [2021-03-10 22:01:57,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:57,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:57,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:57,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:57,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:57,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:57,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:57,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:57,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:57,335 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:57,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:57,341 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:57,344 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:57,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:57,351 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:57,354 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:57,357 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:57,416 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-03-10 22:01:57,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:57,417 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 22:01:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:57,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:57,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:01:57,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096971474] [2021-03-10 22:01:57,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:01:57,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:01:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:57,508 INFO L87 Difference]: Start difference. First operand 632 states and 2068 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:57,843 INFO L93 Difference]: Finished difference Result 839 states and 2636 transitions. [2021-03-10 22:01:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:01:57,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:57,845 INFO L225 Difference]: With dead ends: 839 [2021-03-10 22:01:57,845 INFO L226 Difference]: Without dead ends: 811 [2021-03-10 22:01:57,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-03-10 22:01:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 629. [2021-03-10 22:01:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2802547770700636) internal successors, (2060), 628 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2060 transitions. [2021-03-10 22:01:57,851 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2060 transitions. Word has length 19 [2021-03-10 22:01:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:57,852 INFO L480 AbstractCegarLoop]: Abstraction has 629 states and 2060 transitions. [2021-03-10 22:01:57,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2060 transitions. [2021-03-10 22:01:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:57,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:57,852 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:58,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1813 [2021-03-10 22:01:58,053 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1330594314, now seen corresponding path program 101 times [2021-03-10 22:01:58,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:58,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875118574] [2021-03-10 22:01:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:58,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875118574] [2021-03-10 22:01:58,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755153735] [2021-03-10 22:01:58,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:58,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:58,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:58,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:58,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:58,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:58,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:58,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:58,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:58,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:58,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:58,421 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:01:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:58,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:58,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:58,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44661266] [2021-03-10 22:01:58,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:58,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:58,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:58,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:58,469 INFO L87 Difference]: Start difference. First operand 629 states and 2060 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:58,869 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 22:01:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:59,116 INFO L93 Difference]: Finished difference Result 954 states and 2892 transitions. [2021-03-10 22:01:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:59,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:59,118 INFO L225 Difference]: With dead ends: 954 [2021-03-10 22:01:59,118 INFO L226 Difference]: Without dead ends: 925 [2021-03-10 22:01:59,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 682.3ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:01:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-03-10 22:01:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 630. [2021-03-10 22:01:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.2845786963434023) internal successors, (2066), 629 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 2066 transitions. [2021-03-10 22:01:59,126 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 2066 transitions. Word has length 19 [2021-03-10 22:01:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:59,126 INFO L480 AbstractCegarLoop]: Abstraction has 630 states and 2066 transitions. [2021-03-10 22:01:59,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 2066 transitions. [2021-03-10 22:01:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:59,127 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:59,127 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:59,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:59,327 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:59,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1523934664, now seen corresponding path program 102 times [2021-03-10 22:01:59,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:59,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654792388] [2021-03-10 22:01:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:59,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654792388] [2021-03-10 22:01:59,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156895186] [2021-03-10 22:01:59,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:59,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:59,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:59,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:59,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:59,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:59,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:01:59,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:59,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:59,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:59,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:01:59,712 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:59,715 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:01:59,718 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,772 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 22:01:59,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:59,773 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:01:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:59,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:59,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:01:59,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246415337] [2021-03-10 22:01:59,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:59,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:59,873 INFO L87 Difference]: Start difference. First operand 630 states and 2066 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,258 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 22:02:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:00,617 INFO L93 Difference]: Finished difference Result 1018 states and 3043 transitions. [2021-03-10 22:02:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:02:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:00,619 INFO L225 Difference]: With dead ends: 1018 [2021-03-10 22:02:00,619 INFO L226 Difference]: Without dead ends: 968 [2021-03-10 22:02:00,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 835.0ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:02:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-03-10 22:02:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 632. [2021-03-10 22:02:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.288431061806656) internal successors, (2075), 631 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2075 transitions. [2021-03-10 22:02:00,628 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2075 transitions. Word has length 19 [2021-03-10 22:02:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:00,628 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 2075 transitions. [2021-03-10 22:02:00,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2075 transitions. [2021-03-10 22:02:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:00,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:00,629 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:00,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:00,830 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash -147828234, now seen corresponding path program 103 times [2021-03-10 22:02:00,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:00,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278985554] [2021-03-10 22:02:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:00,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278985554] [2021-03-10 22:02:00,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122388640] [2021-03-10 22:02:00,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:00,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:01,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:01,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:01,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:01,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:01,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:01,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:01,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:01,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:01,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:01,196 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:01,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:01,199 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:01,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:01,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:01,272 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:02:01,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:01,274 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 22:02:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:01,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:01,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:01,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062126562] [2021-03-10 22:02:01,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:01,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:01,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:01,377 INFO L87 Difference]: Start difference. First operand 632 states and 2075 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:01,990 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-03-10 22:02:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:02,465 INFO L93 Difference]: Finished difference Result 1081 states and 3178 transitions. [2021-03-10 22:02:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:02:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:02,467 INFO L225 Difference]: With dead ends: 1081 [2021-03-10 22:02:02,467 INFO L226 Difference]: Without dead ends: 1037 [2021-03-10 22:02:02,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1126.6ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:02:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-03-10 22:02:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 630. [2021-03-10 22:02:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.2845786963434023) internal successors, (2066), 629 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 2066 transitions. [2021-03-10 22:02:02,475 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 2066 transitions. Word has length 19 [2021-03-10 22:02:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:02,476 INFO L480 AbstractCegarLoop]: Abstraction has 630 states and 2066 transitions. [2021-03-10 22:02:02,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 2066 transitions. [2021-03-10 22:02:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:02,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:02,476 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:02,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1857,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:02,677 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1431549238, now seen corresponding path program 104 times [2021-03-10 22:02:02,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:02,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347739817] [2021-03-10 22:02:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:02,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347739817] [2021-03-10 22:02:02,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916260128] [2021-03-10 22:02:02,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:02,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:02,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:02,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:02,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:02,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:02,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:02,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:02,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:02,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:02,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:02,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:02,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:02,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:02,984 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:02,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:02,988 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:02,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:02,992 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:02,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:02,996 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:02,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:03,000 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:03,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:03,003 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:03,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:03,007 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:03,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:03,010 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:03,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:03,014 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:03,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:03,018 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:03,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:03,021 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:03,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:03,025 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:03,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:03,028 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:03,211 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:02:03,211 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 22:02:03,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:02:03,213 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:02:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:03,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:03,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:03,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584020769] [2021-03-10 22:02:03,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:03,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:03,441 INFO L87 Difference]: Start difference. First operand 630 states and 2066 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,428 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-03-10 22:02:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:04,447 INFO L93 Difference]: Finished difference Result 1111 states and 3277 transitions. [2021-03-10 22:02:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:02:04,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:04,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:04,449 INFO L225 Difference]: With dead ends: 1111 [2021-03-10 22:02:04,449 INFO L226 Difference]: Without dead ends: 1061 [2021-03-10 22:02:04,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1055.3ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:02:04,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-03-10 22:02:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 631. [2021-03-10 22:02:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 3.2888888888888888) internal successors, (2072), 630 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 2072 transitions. [2021-03-10 22:02:04,458 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 2072 transitions. Word has length 19 [2021-03-10 22:02:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:04,458 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 2072 transitions. [2021-03-10 22:02:04,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 2072 transitions. [2021-03-10 22:02:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:04,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:04,458 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:04,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1873 [2021-03-10 22:02:04,659 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:04,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:04,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1571075658, now seen corresponding path program 105 times [2021-03-10 22:02:04,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:04,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19361599] [2021-03-10 22:02:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:04,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19361599] [2021-03-10 22:02:04,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561084873] [2021-03-10 22:02:04,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:04,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:04,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:04,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:04,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:04,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:04,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:04,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:04,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:04,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:04,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:04,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:04,985 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:04,989 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:04,992 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:04,998 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:05,001 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:05,005 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:05,009 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:05,012 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:05,016 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:05,019 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:05,023 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:05,026 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,206 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:02:05,207 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-03-10 22:02:05,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:02:05,208 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:02:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:05,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:05,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:05,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314140088] [2021-03-10 22:02:05,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:05,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:05,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:05,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:05,488 INFO L87 Difference]: Start difference. First operand 631 states and 2072 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:06,053 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-10 22:02:06,278 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-03-10 22:02:06,543 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 22:02:06,734 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 22:02:07,004 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:02:07,197 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-03-10 22:02:07,374 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 22:02:07,758 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-03-10 22:02:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:07,885 INFO L93 Difference]: Finished difference Result 1176 states and 3412 transitions. [2021-03-10 22:02:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:02:07,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:07,888 INFO L225 Difference]: With dead ends: 1176 [2021-03-10 22:02:07,888 INFO L226 Difference]: Without dead ends: 1133 [2021-03-10 22:02:07,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2377.4ms TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:02:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-03-10 22:02:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 629. [2021-03-10 22:02:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2802547770700636) internal successors, (2060), 628 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2060 transitions. [2021-03-10 22:02:07,897 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2060 transitions. Word has length 19 [2021-03-10 22:02:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:07,897 INFO L480 AbstractCegarLoop]: Abstraction has 629 states and 2060 transitions. [2021-03-10 22:02:07,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2060 transitions. [2021-03-10 22:02:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:07,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:07,898 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:08,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1892 [2021-03-10 22:02:08,098 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:08,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:08,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1009794104, now seen corresponding path program 106 times [2021-03-10 22:02:08,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:08,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936448168] [2021-03-10 22:02:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:08,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936448168] [2021-03-10 22:02:08,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23546685] [2021-03-10 22:02:08,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:08,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:08,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:08,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:08,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:08,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:08,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:08,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:08,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:08,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:08,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:08,460 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:08,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:08,466 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,524 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:02:08,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:08,525 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:337, output treesize:67 [2021-03-10 22:02:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:08,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:08,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:02:08,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282388950] [2021-03-10 22:02:08,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:08,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:08,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:08,620 INFO L87 Difference]: Start difference. First operand 629 states and 2060 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:08,981 INFO L93 Difference]: Finished difference Result 873 states and 2717 transitions. [2021-03-10 22:02:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:08,983 INFO L225 Difference]: With dead ends: 873 [2021-03-10 22:02:08,983 INFO L226 Difference]: Without dead ends: 830 [2021-03-10 22:02:08,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:02:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-10 22:02:08,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 632. [2021-03-10 22:02:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.288431061806656) internal successors, (2075), 631 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2075 transitions. [2021-03-10 22:02:08,990 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2075 transitions. Word has length 19 [2021-03-10 22:02:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:08,990 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 2075 transitions. [2021-03-10 22:02:08,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2075 transitions. [2021-03-10 22:02:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:08,991 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:08,991 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:09,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1913,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:09,192 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:09,192 INFO L82 PathProgramCache]: Analyzing trace with hash -258393666, now seen corresponding path program 107 times [2021-03-10 22:02:09,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:09,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438237152] [2021-03-10 22:02:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:09,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438237152] [2021-03-10 22:02:09,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614135735] [2021-03-10 22:02:09,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:09,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:09,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:09,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:09,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:09,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:09,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:09,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:09,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:09,509 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:09,513 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:09,516 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:09,520 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:09,524 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:09,528 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:09,531 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:09,535 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:09,538 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:09,542 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:09,545 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:09,549 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:09,552 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:09,555 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,737 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:02:09,737 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-03-10 22:02:09,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:02:09,739 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:02:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:09,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:09,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:09,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147745403] [2021-03-10 22:02:09,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:09,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:09,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:09,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:09,959 INFO L87 Difference]: Start difference. First operand 632 states and 2075 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:10,697 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-03-10 22:02:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:10,998 INFO L93 Difference]: Finished difference Result 1131 states and 3333 transitions. [2021-03-10 22:02:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:02:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:11,001 INFO L225 Difference]: With dead ends: 1131 [2021-03-10 22:02:11,001 INFO L226 Difference]: Without dead ends: 1088 [2021-03-10 22:02:11,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1128.4ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:02:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-03-10 22:02:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 633. [2021-03-10 22:02:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.2927215189873418) internal successors, (2081), 632 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2081 transitions. [2021-03-10 22:02:11,010 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2081 transitions. Word has length 19 [2021-03-10 22:02:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:11,010 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 2081 transitions. [2021-03-10 22:02:11,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2081 transitions. [2021-03-10 22:02:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:11,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:11,011 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:11,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1931,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:11,212 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1033948734, now seen corresponding path program 108 times [2021-03-10 22:02:11,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:11,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934861904] [2021-03-10 22:02:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934861904] [2021-03-10 22:02:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258207550] [2021-03-10 22:02:11,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:11,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:02:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:11,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:11,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:11,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:11,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:11,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:11,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:11,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:11,572 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:11,576 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:11,580 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:11,584 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:11,588 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:11,592 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:11,597 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:11,600 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:11,604 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:11,607 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:11,611 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:11,614 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:11,618 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,802 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:02:11,802 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 22:02:11,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:02:11,804 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:763, output treesize:222 [2021-03-10 22:02:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:12,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:12,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:12,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082164512] [2021-03-10 22:02:12,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:12,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:12,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:12,069 INFO L87 Difference]: Start difference. First operand 633 states and 2081 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:12,797 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:02:12,985 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 22:02:13,269 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 22:02:13,407 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-10 22:02:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:13,455 INFO L93 Difference]: Finished difference Result 928 states and 2858 transitions. [2021-03-10 22:02:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:02:13,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:13,456 INFO L225 Difference]: With dead ends: 928 [2021-03-10 22:02:13,456 INFO L226 Difference]: Without dead ends: 906 [2021-03-10 22:02:13,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1559.0ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:02:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-03-10 22:02:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 629. [2021-03-10 22:02:13,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2802547770700636) internal successors, (2060), 628 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2060 transitions. [2021-03-10 22:02:13,463 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2060 transitions. Word has length 19 [2021-03-10 22:02:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:13,464 INFO L480 AbstractCegarLoop]: Abstraction has 629 states and 2060 transitions. [2021-03-10 22:02:13,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2060 transitions. [2021-03-10 22:02:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:13,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:13,464 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:13,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1948,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:13,679 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:13,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1691439274, now seen corresponding path program 109 times [2021-03-10 22:02:13,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:13,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519326195] [2021-03-10 22:02:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:13,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519326195] [2021-03-10 22:02:13,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584652772] [2021-03-10 22:02:13,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:13,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:13,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:14,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:14,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:14,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:14,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:14,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:14,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:14,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:02:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:14,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:14,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:14,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031935872] [2021-03-10 22:02:14,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:14,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:14,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:14,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:14,184 INFO L87 Difference]: Start difference. First operand 629 states and 2060 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:14,554 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-10 22:02:14,914 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-03-10 22:02:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:15,238 INFO L93 Difference]: Finished difference Result 1015 states and 3071 transitions. [2021-03-10 22:02:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:02:15,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:15,240 INFO L225 Difference]: With dead ends: 1015 [2021-03-10 22:02:15,240 INFO L226 Difference]: Without dead ends: 986 [2021-03-10 22:02:15,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1122.8ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:02:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-03-10 22:02:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 631. [2021-03-10 22:02:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 3.287301587301587) internal successors, (2071), 630 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 2071 transitions. [2021-03-10 22:02:15,249 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 2071 transitions. Word has length 19 [2021-03-10 22:02:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:15,249 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 2071 transitions. [2021-03-10 22:02:15,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 2071 transitions. [2021-03-10 22:02:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:15,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:15,250 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:15,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-03-10 22:02:15,450 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:15,451 INFO L82 PathProgramCache]: Analyzing trace with hash 251000956, now seen corresponding path program 110 times [2021-03-10 22:02:15,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:15,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269780399] [2021-03-10 22:02:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:15,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269780399] [2021-03-10 22:02:15,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560393772] [2021-03-10 22:02:15,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:15,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:15,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:15,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:15,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:15,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:15,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:15,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:15,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:15,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:15,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:15,920 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:15,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:15,927 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:15,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,990 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-03-10 22:02:15,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:15,991 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:02:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:16,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:16,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:16,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024690590] [2021-03-10 22:02:16,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:16,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:16,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:16,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:16,094 INFO L87 Difference]: Start difference. First operand 631 states and 2071 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:16,456 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 22:02:16,820 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-10 22:02:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:17,446 INFO L93 Difference]: Finished difference Result 1079 states and 3222 transitions. [2021-03-10 22:02:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:02:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:17,448 INFO L225 Difference]: With dead ends: 1079 [2021-03-10 22:02:17,448 INFO L226 Difference]: Without dead ends: 1029 [2021-03-10 22:02:17,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1430.5ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:02:17,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-03-10 22:02:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 635. [2021-03-10 22:02:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.2917981072555205) internal successors, (2087), 634 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2087 transitions. [2021-03-10 22:02:17,457 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2087 transitions. Word has length 19 [2021-03-10 22:02:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:17,457 INFO L480 AbstractCegarLoop]: Abstraction has 635 states and 2087 transitions. [2021-03-10 22:02:17,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2087 transitions. [2021-03-10 22:02:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:17,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:17,458 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:17,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1978 [2021-03-10 22:02:17,658 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1420761942, now seen corresponding path program 111 times [2021-03-10 22:02:17,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:17,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895534687] [2021-03-10 22:02:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:17,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895534687] [2021-03-10 22:02:17,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920580187] [2021-03-10 22:02:17,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:17,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:17,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:17,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:18,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:18,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:18,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:18,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:18,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:18,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:18,021 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:18,024 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:18,028 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:18,031 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:18,034 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,111 INFO L628 ElimStorePlain]: treesize reduction 105, result has 45.9 percent of original size [2021-03-10 22:02:18,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:02:18,112 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:328, output treesize:89 [2021-03-10 22:02:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:18,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:18,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:18,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758027831] [2021-03-10 22:02:18,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:18,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:18,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:18,220 INFO L87 Difference]: Start difference. First operand 635 states and 2087 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:18,677 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 22:02:18,890 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:02:19,247 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-03-10 22:02:19,408 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 22:02:19,663 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 22:02:20,176 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-10 22:02:20,326 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:02:20,448 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:02:21,039 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 22:02:21,770 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-10 22:02:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:21,829 INFO L93 Difference]: Finished difference Result 1400 states and 4028 transitions. [2021-03-10 22:02:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:02:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:21,832 INFO L225 Difference]: With dead ends: 1400 [2021-03-10 22:02:21,832 INFO L226 Difference]: Without dead ends: 1329 [2021-03-10 22:02:21,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 3315.3ms TimeCoverageRelationStatistics Valid=429, Invalid=2223, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:02:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-10 22:02:21,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 643. [2021-03-10 22:02:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 3.311526479750779) internal successors, (2126), 642 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2126 transitions. [2021-03-10 22:02:21,842 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2126 transitions. Word has length 19 [2021-03-10 22:02:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:21,842 INFO L480 AbstractCegarLoop]: Abstraction has 643 states and 2126 transitions. [2021-03-10 22:02:21,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2126 transitions. [2021-03-10 22:02:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:21,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:21,843 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:22,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1995 [2021-03-10 22:02:22,044 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:22,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1450957930, now seen corresponding path program 112 times [2021-03-10 22:02:22,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:22,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848927405] [2021-03-10 22:02:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:22,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848927405] [2021-03-10 22:02:22,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088174130] [2021-03-10 22:02:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:22,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:22,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:22,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:22,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:22,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:22,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:22,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:22,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:22,477 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:22,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:22,485 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:22,489 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:22,493 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:22,497 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:22,500 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:22,504 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:22,508 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:22,512 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:22,515 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:22,519 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:22,522 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,717 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:02:22,718 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 22:02:22,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:02:22,720 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:02:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:22,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:22,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:22,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380975889] [2021-03-10 22:02:22,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:22,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:22,992 INFO L87 Difference]: Start difference. First operand 643 states and 2126 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:23,727 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-03-10 22:02:23,980 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 22:02:24,167 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 22:02:24,588 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 22:02:24,973 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:02:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:25,227 INFO L93 Difference]: Finished difference Result 1256 states and 3684 transitions. [2021-03-10 22:02:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:02:25,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:25,229 INFO L225 Difference]: With dead ends: 1256 [2021-03-10 22:02:25,229 INFO L226 Difference]: Without dead ends: 1213 [2021-03-10 22:02:25,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2323.4ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:02:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-03-10 22:02:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 641. [2021-03-10 22:02:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 3.3078125) internal successors, (2117), 640 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 2117 transitions. [2021-03-10 22:02:25,240 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 2117 transitions. Word has length 19 [2021-03-10 22:02:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:25,240 INFO L480 AbstractCegarLoop]: Abstraction has 641 states and 2117 transitions. [2021-03-10 22:02:25,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 2117 transitions. [2021-03-10 22:02:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:25,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:25,241 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:25,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-03-10 22:02:25,441 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:25,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1760363270, now seen corresponding path program 113 times [2021-03-10 22:02:25,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:25,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033845885] [2021-03-10 22:02:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:25,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033845885] [2021-03-10 22:02:25,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855953081] [2021-03-10 22:02:25,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:25,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:25,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:25,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:25,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:25,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:25,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:25,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:25,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:25,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:25,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:25,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:25,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:25,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:25,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:25,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:25,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:25,752 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:158, output treesize:83 [2021-03-10 22:02:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:25,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:25,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078552398] [2021-03-10 22:02:25,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:25,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:25,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:25,931 INFO L87 Difference]: Start difference. First operand 641 states and 2117 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,806 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:02:26,921 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 22:02:27,226 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 22:02:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:27,414 INFO L93 Difference]: Finished difference Result 1102 states and 3315 transitions. [2021-03-10 22:02:27,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:02:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:27,417 INFO L225 Difference]: With dead ends: 1102 [2021-03-10 22:02:27,417 INFO L226 Difference]: Without dead ends: 1058 [2021-03-10 22:02:27,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1445.4ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:02:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-03-10 22:02:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 641. [2021-03-10 22:02:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 3.3078125) internal successors, (2117), 640 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 2117 transitions. [2021-03-10 22:02:27,426 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 2117 transitions. Word has length 19 [2021-03-10 22:02:27,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:27,426 INFO L480 AbstractCegarLoop]: Abstraction has 641 states and 2117 transitions. [2021-03-10 22:02:27,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 2117 transitions. [2021-03-10 22:02:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:27,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:27,427 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:27,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2036,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:27,627 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:27,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:27,627 INFO L82 PathProgramCache]: Analyzing trace with hash 228725566, now seen corresponding path program 114 times [2021-03-10 22:02:27,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:27,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343856408] [2021-03-10 22:02:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:27,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343856408] [2021-03-10 22:02:27,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136638083] [2021-03-10 22:02:27,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:27,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:27,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:27,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:27,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:27,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:27,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:27,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:27,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:27,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:27,953 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:27,956 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:28,059 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:02:28,060 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-03-10 22:02:28,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:02:28,061 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:245, output treesize:133 [2021-03-10 22:02:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:28,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:28,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:02:28,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398946374] [2021-03-10 22:02:28,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:28,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:28,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:28,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:28,344 INFO L87 Difference]: Start difference. First operand 641 states and 2117 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:28,756 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 22:02:28,874 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 22:02:29,028 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 22:02:29,181 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-10 22:02:29,369 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:02:29,611 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-10 22:02:29,876 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-10 22:02:30,044 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-10 22:02:30,196 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 22:02:30,613 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:02:30,909 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-10 22:02:31,196 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 22:02:31,424 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-10 22:02:31,718 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 22:02:31,847 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 22:02:32,047 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-03-10 22:02:32,433 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-10 22:02:32,814 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-03-10 22:02:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:33,036 INFO L93 Difference]: Finished difference Result 1465 states and 4233 transitions. [2021-03-10 22:02:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:02:33,036 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:33,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:33,039 INFO L225 Difference]: With dead ends: 1465 [2021-03-10 22:02:33,039 INFO L226 Difference]: Without dead ends: 1387 [2021-03-10 22:02:33,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 4601.1ms TimeCoverageRelationStatistics Valid=516, Invalid=2136, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:02:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-03-10 22:02:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 656. [2021-03-10 22:02:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 3.351145038167939) internal successors, (2195), 655 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2195 transitions. [2021-03-10 22:02:33,050 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2195 transitions. Word has length 19 [2021-03-10 22:02:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:33,050 INFO L480 AbstractCegarLoop]: Abstraction has 656 states and 2195 transitions. [2021-03-10 22:02:33,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2195 transitions. [2021-03-10 22:02:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:33,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:33,051 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:33,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2050,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:33,256 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash 644079190, now seen corresponding path program 115 times [2021-03-10 22:02:33,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:33,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903643745] [2021-03-10 22:02:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903643745] [2021-03-10 22:02:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446671587] [2021-03-10 22:02:33,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:33,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:33,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:33,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:33,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:33,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:33,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:33,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:33,686 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:33,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:33,693 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:33,696 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:33,699 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,806 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 22:02:33,806 INFO L628 ElimStorePlain]: treesize reduction 52, result has 71.9 percent of original size [2021-03-10 22:02:33,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:02:33,808 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:318, output treesize:133 [2021-03-10 22:02:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:34,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:34,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:34,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564221637] [2021-03-10 22:02:34,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:34,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:34,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:34,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:34,077 INFO L87 Difference]: Start difference. First operand 656 states and 2195 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:34,517 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 22:02:34,646 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:02:34,824 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 22:02:35,042 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 22:02:35,346 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 22:02:35,542 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 22:02:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:36,390 INFO L93 Difference]: Finished difference Result 1523 states and 4388 transitions. [2021-03-10 22:02:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:02:36,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:36,393 INFO L225 Difference]: With dead ends: 1523 [2021-03-10 22:02:36,393 INFO L226 Difference]: Without dead ends: 1472 [2021-03-10 22:02:36,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2362.3ms TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:02:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-03-10 22:02:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 662. [2021-03-10 22:02:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.361573373676248) internal successors, (2222), 661 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2222 transitions. [2021-03-10 22:02:36,404 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2222 transitions. Word has length 19 [2021-03-10 22:02:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:36,404 INFO L480 AbstractCegarLoop]: Abstraction has 662 states and 2222 transitions. [2021-03-10 22:02:36,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2222 transitions. [2021-03-10 22:02:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:36,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:36,405 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:36,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2070 [2021-03-10 22:02:36,606 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:36,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:36,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1386262030, now seen corresponding path program 116 times [2021-03-10 22:02:36,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:36,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252944331] [2021-03-10 22:02:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:36,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252944331] [2021-03-10 22:02:36,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309729131] [2021-03-10 22:02:36,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:36,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:36,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:36,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:36,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:36,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:36,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:36,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:36,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:36,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:36,881 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:36,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:36,890 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:36,894 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:36,897 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:37,019 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 22:02:37,019 INFO L628 ElimStorePlain]: treesize reduction 52, result has 71.9 percent of original size [2021-03-10 22:02:37,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:02:37,021 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-03-10 22:02:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:37,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:37,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:37,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434811026] [2021-03-10 22:02:37,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:37,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:37,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:37,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:37,240 INFO L87 Difference]: Start difference. First operand 662 states and 2222 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:37,606 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 22:02:37,876 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 22:02:38,288 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-10 22:02:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:38,571 INFO L93 Difference]: Finished difference Result 1295 states and 3880 transitions. [2021-03-10 22:02:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:02:38,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:38,573 INFO L225 Difference]: With dead ends: 1295 [2021-03-10 22:02:38,573 INFO L226 Difference]: Without dead ends: 1265 [2021-03-10 22:02:38,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1318.2ms TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:02:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-03-10 22:02:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 660. [2021-03-10 22:02:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.361153262518968) internal successors, (2215), 659 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2215 transitions. [2021-03-10 22:02:38,582 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2215 transitions. Word has length 19 [2021-03-10 22:02:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:38,582 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 2215 transitions. [2021-03-10 22:02:38,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2215 transitions. [2021-03-10 22:02:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:38,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:38,583 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:38,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2092,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:38,783 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:38,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1163617012, now seen corresponding path program 117 times [2021-03-10 22:02:38,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:38,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397174262] [2021-03-10 22:02:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:38,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397174262] [2021-03-10 22:02:38,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861512723] [2021-03-10 22:02:38,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:38,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:38,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:39,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:39,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:39,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:39,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:39,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:39,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:39,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:39,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:39,150 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:39,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:39,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:39,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:39,157 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:39,216 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:02:39,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:39,218 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:254, output treesize:67 [2021-03-10 22:02:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:39,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:39,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:02:39,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997032269] [2021-03-10 22:02:39,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:39,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:39,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:39,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:39,315 INFO L87 Difference]: Start difference. First operand 660 states and 2215 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:40,156 INFO L93 Difference]: Finished difference Result 1170 states and 3579 transitions. [2021-03-10 22:02:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:02:40,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:40,159 INFO L225 Difference]: With dead ends: 1170 [2021-03-10 22:02:40,159 INFO L226 Difference]: Without dead ends: 1077 [2021-03-10 22:02:40,159 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 870.6ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:02:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-03-10 22:02:40,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 683. [2021-03-10 22:02:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.397360703812317) internal successors, (2317), 682 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2317 transitions. [2021-03-10 22:02:40,169 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2317 transitions. Word has length 19 [2021-03-10 22:02:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:40,169 INFO L480 AbstractCegarLoop]: Abstraction has 683 states and 2317 transitions. [2021-03-10 22:02:40,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2317 transitions. [2021-03-10 22:02:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:40,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:40,170 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:40,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-03-10 22:02:40,379 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:40,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1812997766, now seen corresponding path program 118 times [2021-03-10 22:02:40,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:40,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519673433] [2021-03-10 22:02:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:40,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519673433] [2021-03-10 22:02:40,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656512556] [2021-03-10 22:02:40,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:40,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:40,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:40,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:40,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:40,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:40,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:40,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:40,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:40,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:40,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:40,708 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:40,712 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:40,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:40,720 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:40,723 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:40,727 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:40,730 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:40,734 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:40,737 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,923 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:02:40,923 INFO L628 ElimStorePlain]: treesize reduction 41, result has 84.4 percent of original size [2021-03-10 22:02:40,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:02:40,925 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:577, output treesize:222 [2021-03-10 22:02:41,043 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:02:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:41,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:41,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:02:41,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999033474] [2021-03-10 22:02:41,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:41,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:41,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:41,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:41,173 INFO L87 Difference]: Start difference. First operand 683 states and 2317 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:41,786 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 22:02:42,240 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 22:02:42,603 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 22:02:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:43,000 INFO L93 Difference]: Finished difference Result 1299 states and 3874 transitions. [2021-03-10 22:02:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:02:43,000 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:43,002 INFO L225 Difference]: With dead ends: 1299 [2021-03-10 22:02:43,002 INFO L226 Difference]: Without dead ends: 1194 [2021-03-10 22:02:43,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1849.5ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:02:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-03-10 22:02:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 693. [2021-03-10 22:02:43,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.408959537572254) internal successors, (2359), 692 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:43,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2359 transitions. [2021-03-10 22:02:43,012 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2359 transitions. Word has length 19 [2021-03-10 22:02:43,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:43,012 INFO L480 AbstractCegarLoop]: Abstraction has 693 states and 2359 transitions. [2021-03-10 22:02:43,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:43,013 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2359 transitions. [2021-03-10 22:02:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:43,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:43,013 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:43,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2128 [2021-03-10 22:02:43,214 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:43,214 INFO L82 PathProgramCache]: Analyzing trace with hash -481461284, now seen corresponding path program 119 times [2021-03-10 22:02:43,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:43,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236802080] [2021-03-10 22:02:43,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:43,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236802080] [2021-03-10 22:02:43,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825232755] [2021-03-10 22:02:43,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:43,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:43,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:43,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:43,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:43,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:43,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:43,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:43,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:43,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:43,609 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:43,612 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:43,615 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:43,617 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,684 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.5 percent of original size [2021-03-10 22:02:43,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:43,686 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:234, output treesize:77 [2021-03-10 22:02:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:43,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:43,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:02:43,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585109589] [2021-03-10 22:02:43,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:43,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:43,791 INFO L87 Difference]: Start difference. First operand 693 states and 2359 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:44,434 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 22:02:44,647 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-10 22:02:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:44,936 INFO L93 Difference]: Finished difference Result 1106 states and 3435 transitions. [2021-03-10 22:02:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:02:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:44,938 INFO L225 Difference]: With dead ends: 1106 [2021-03-10 22:02:44,938 INFO L226 Difference]: Without dead ends: 1046 [2021-03-10 22:02:44,938 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1179.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:02:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-03-10 22:02:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 705. [2021-03-10 22:02:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.413352272727273) internal successors, (2403), 704 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2403 transitions. [2021-03-10 22:02:44,947 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2403 transitions. Word has length 19 [2021-03-10 22:02:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:44,947 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2403 transitions. [2021-03-10 22:02:44,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2403 transitions. [2021-03-10 22:02:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:44,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:44,948 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:45,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2146 [2021-03-10 22:02:45,148 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:45,148 INFO L82 PathProgramCache]: Analyzing trace with hash -52617630, now seen corresponding path program 120 times [2021-03-10 22:02:45,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:45,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761738925] [2021-03-10 22:02:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:45,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761738925] [2021-03-10 22:02:45,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223139216] [2021-03-10 22:02:45,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:45,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:45,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:45,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:45,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:45,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:45,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:45,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:45,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:45,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:45,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:02:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:45,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:45,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:45,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869925018] [2021-03-10 22:02:45,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:45,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:45,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:45,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:45,529 INFO L87 Difference]: Start difference. First operand 705 states and 2403 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:45,815 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-10 22:02:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:45,926 INFO L93 Difference]: Finished difference Result 879 states and 2868 transitions. [2021-03-10 22:02:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:45,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:45,928 INFO L225 Difference]: With dead ends: 879 [2021-03-10 22:02:45,928 INFO L226 Difference]: Without dead ends: 850 [2021-03-10 22:02:45,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:02:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-03-10 22:02:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 708. [2021-03-10 22:02:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.4101838755304104) internal successors, (2411), 707 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2411 transitions. [2021-03-10 22:02:45,937 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2411 transitions. Word has length 19 [2021-03-10 22:02:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:45,937 INFO L480 AbstractCegarLoop]: Abstraction has 708 states and 2411 transitions. [2021-03-10 22:02:45,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2411 transitions. [2021-03-10 22:02:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:45,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:45,938 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:46,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:46,138 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1493055948, now seen corresponding path program 121 times [2021-03-10 22:02:46,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:46,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105226253] [2021-03-10 22:02:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:46,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105226253] [2021-03-10 22:02:46,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138171531] [2021-03-10 22:02:46,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:46,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:46,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:46,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:46,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:46,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:46,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:46,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:46,458 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:46,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:46,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:46,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:46,465 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:46,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:46,468 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:46,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:46,472 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:46,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:46,475 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:46,535 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:02:46,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:46,536 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:02:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:46,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:46,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:46,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767051751] [2021-03-10 22:02:46,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:46,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:46,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:46,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:46,634 INFO L87 Difference]: Start difference. First operand 708 states and 2411 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:47,200 INFO L93 Difference]: Finished difference Result 967 states and 3083 transitions. [2021-03-10 22:02:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:02:47,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:47,202 INFO L225 Difference]: With dead ends: 967 [2021-03-10 22:02:47,202 INFO L226 Difference]: Without dead ends: 909 [2021-03-10 22:02:47,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 642.7ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:02:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-03-10 22:02:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 717. [2021-03-10 22:02:47,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.409217877094972) internal successors, (2441), 716 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:47,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2441 transitions. [2021-03-10 22:02:47,211 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2441 transitions. Word has length 19 [2021-03-10 22:02:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:47,211 INFO L480 AbstractCegarLoop]: Abstraction has 717 states and 2441 transitions. [2021-03-10 22:02:47,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2441 transitions. [2021-03-10 22:02:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:47,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:47,213 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:47,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2171,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:47,413 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:47,413 INFO L82 PathProgramCache]: Analyzing trace with hash 655740588, now seen corresponding path program 122 times [2021-03-10 22:02:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:47,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012312341] [2021-03-10 22:02:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:47,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012312341] [2021-03-10 22:02:47,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385116526] [2021-03-10 22:02:47,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:47,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:47,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:47,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:47,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:47,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:47,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:47,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:47,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:47,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:47,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:47,769 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:47,772 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:47,775 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:47,779 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,838 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:02:47,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:47,840 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:333, output treesize:67 [2021-03-10 22:02:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:47,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:47,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:02:47,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583730589] [2021-03-10 22:02:47,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:02:47,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:02:47,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:47,936 INFO L87 Difference]: Start difference. First operand 717 states and 2441 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:48,332 INFO L93 Difference]: Finished difference Result 918 states and 2982 transitions. [2021-03-10 22:02:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:02:48,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:48,334 INFO L225 Difference]: With dead ends: 918 [2021-03-10 22:02:48,334 INFO L226 Difference]: Without dead ends: 890 [2021-03-10 22:02:48,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 508.5ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:02:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-03-10 22:02:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 717. [2021-03-10 22:02:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.409217877094972) internal successors, (2441), 716 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2441 transitions. [2021-03-10 22:02:48,343 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2441 transitions. Word has length 19 [2021-03-10 22:02:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:48,343 INFO L480 AbstractCegarLoop]: Abstraction has 717 states and 2441 transitions. [2021-03-10 22:02:48,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2441 transitions. [2021-03-10 22:02:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:48,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:48,344 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:48,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-03-10 22:02:48,544 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash -356951944, now seen corresponding path program 123 times [2021-03-10 22:02:48,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:48,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949491597] [2021-03-10 22:02:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:48,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949491597] [2021-03-10 22:02:48,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011677333] [2021-03-10 22:02:48,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:48,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:48,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:48,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:48,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:48,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:48,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:48,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:48,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:48,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:48,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:48,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:48,918 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:48,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:48,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:48,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:48,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:48,984 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:02:48,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:48,985 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:254, output treesize:67 [2021-03-10 22:02:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:49,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:49,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:49,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736129759] [2021-03-10 22:02:49,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:49,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:49,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:49,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:49,085 INFO L87 Difference]: Start difference. First operand 717 states and 2441 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:50,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:50,027 INFO L93 Difference]: Finished difference Result 1151 states and 3528 transitions. [2021-03-10 22:02:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:02:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:50,029 INFO L225 Difference]: With dead ends: 1151 [2021-03-10 22:02:50,029 INFO L226 Difference]: Without dead ends: 1072 [2021-03-10 22:02:50,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 984.3ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:02:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-03-10 22:02:50,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 729. [2021-03-10 22:02:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.409340659340659) internal successors, (2482), 728 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2482 transitions. [2021-03-10 22:02:50,040 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2482 transitions. Word has length 19 [2021-03-10 22:02:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:50,040 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2482 transitions. [2021-03-10 22:02:50,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2482 transitions. [2021-03-10 22:02:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:50,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:50,041 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:50,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2208,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:50,241 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2094087908, now seen corresponding path program 124 times [2021-03-10 22:02:50,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:50,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016114116] [2021-03-10 22:02:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:50,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016114116] [2021-03-10 22:02:50,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792728843] [2021-03-10 22:02:50,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:50,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:50,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:50,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:50,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:50,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:50,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:50,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:50,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:50,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:50,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:50,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:02:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:50,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:50,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:02:50,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849768353] [2021-03-10 22:02:50,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:02:50,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:02:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:50,747 INFO L87 Difference]: Start difference. First operand 729 states and 2482 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:51,311 INFO L93 Difference]: Finished difference Result 919 states and 2990 transitions. [2021-03-10 22:02:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:51,312 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:51,313 INFO L225 Difference]: With dead ends: 919 [2021-03-10 22:02:51,313 INFO L226 Difference]: Without dead ends: 890 [2021-03-10 22:02:51,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 715.9ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:02:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-03-10 22:02:51,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 733. [2021-03-10 22:02:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.4098360655737703) internal successors, (2496), 732 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2496 transitions. [2021-03-10 22:02:51,322 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2496 transitions. Word has length 19 [2021-03-10 22:02:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:51,323 INFO L480 AbstractCegarLoop]: Abstraction has 733 states and 2496 transitions. [2021-03-10 22:02:51,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2496 transitions. [2021-03-10 22:02:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:51,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:51,324 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:51,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2226 [2021-03-10 22:02:51,524 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:51,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:51,524 INFO L82 PathProgramCache]: Analyzing trace with hash 760441070, now seen corresponding path program 125 times [2021-03-10 22:02:51,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:51,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969845856] [2021-03-10 22:02:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:51,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969845856] [2021-03-10 22:02:51,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154029627] [2021-03-10 22:02:51,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:51,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:51,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:51,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:51,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:51,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:51,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:51,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:51,880 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:51,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:51,886 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:51,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:51,893 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:51,896 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:51,899 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:51,902 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:51,964 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-03-10 22:02:51,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:51,966 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:472, output treesize:67 [2021-03-10 22:02:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:52,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:52,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:52,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589724678] [2021-03-10 22:02:52,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:52,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:52,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:52,057 INFO L87 Difference]: Start difference. First operand 733 states and 2496 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:52,773 INFO L93 Difference]: Finished difference Result 1007 states and 3205 transitions. [2021-03-10 22:02:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:02:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:52,775 INFO L225 Difference]: With dead ends: 1007 [2021-03-10 22:02:52,775 INFO L226 Difference]: Without dead ends: 949 [2021-03-10 22:02:52,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 738.7ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:02:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-03-10 22:02:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 733. [2021-03-10 22:02:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.4098360655737703) internal successors, (2496), 732 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2496 transitions. [2021-03-10 22:02:52,784 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2496 transitions. Word has length 19 [2021-03-10 22:02:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:52,785 INFO L480 AbstractCegarLoop]: Abstraction has 733 states and 2496 transitions. [2021-03-10 22:02:52,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2496 transitions. [2021-03-10 22:02:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:52,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:52,786 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:52,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2234 [2021-03-10 22:02:52,986 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:52,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1385729690, now seen corresponding path program 126 times [2021-03-10 22:02:52,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:52,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506574448] [2021-03-10 22:02:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:53,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506574448] [2021-03-10 22:02:53,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481887235] [2021-03-10 22:02:53,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:53,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:02:53,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:53,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:53,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:53,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:53,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:53,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:53,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:53,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:53,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:53,337 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:53,340 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:53,343 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:53,346 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,398 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-03-10 22:02:53,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:53,399 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-03-10 22:02:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:53,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:53,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:53,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166474790] [2021-03-10 22:02:53,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:53,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:53,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:53,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:53,501 INFO L87 Difference]: Start difference. First operand 733 states and 2496 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:53,873 INFO L93 Difference]: Finished difference Result 928 states and 3031 transitions. [2021-03-10 22:02:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:53,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:53,875 INFO L225 Difference]: With dead ends: 928 [2021-03-10 22:02:53,875 INFO L226 Difference]: Without dead ends: 913 [2021-03-10 22:02:53,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:02:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-03-10 22:02:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 736. [2021-03-10 22:02:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.410884353741497) internal successors, (2507), 735 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2507 transitions. [2021-03-10 22:02:53,884 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2507 transitions. Word has length 19 [2021-03-10 22:02:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:53,884 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 2507 transitions. [2021-03-10 22:02:53,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,884 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2507 transitions. [2021-03-10 22:02:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:53,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:53,885 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:54,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:54,086 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:54,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:54,086 INFO L82 PathProgramCache]: Analyzing trace with hash -275510810, now seen corresponding path program 127 times [2021-03-10 22:02:54,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:54,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818397794] [2021-03-10 22:02:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:54,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818397794] [2021-03-10 22:02:54,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317889401] [2021-03-10 22:02:54,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:54,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:54,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:54,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:54,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:54,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:54,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:54,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:54,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:02:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:54,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:54,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:54,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599304668] [2021-03-10 22:02:54,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:54,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:54,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:54,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:54,573 INFO L87 Difference]: Start difference. First operand 736 states and 2507 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:55,194 INFO L93 Difference]: Finished difference Result 961 states and 3109 transitions. [2021-03-10 22:02:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:02:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:55,196 INFO L225 Difference]: With dead ends: 961 [2021-03-10 22:02:55,196 INFO L226 Difference]: Without dead ends: 917 [2021-03-10 22:02:55,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 714.4ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:02:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-03-10 22:02:55,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 739. [2021-03-10 22:02:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.4173441734417342) internal successors, (2522), 738 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2522 transitions. [2021-03-10 22:02:55,205 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2522 transitions. Word has length 19 [2021-03-10 22:02:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:55,205 INFO L480 AbstractCegarLoop]: Abstraction has 739 states and 2522 transitions. [2021-03-10 22:02:55,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2522 transitions. [2021-03-10 22:02:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:55,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:55,206 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:55,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2270 [2021-03-10 22:02:55,407 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:55,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1715949128, now seen corresponding path program 128 times [2021-03-10 22:02:55,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:55,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003413043] [2021-03-10 22:02:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:55,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003413043] [2021-03-10 22:02:55,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058344944] [2021-03-10 22:02:55,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:55,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:55,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:55,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:55,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:55,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:55,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:55,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:55,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:55,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:55,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:55,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:55,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:55,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:55,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:55,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:55,801 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:55,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:55,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:55,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:55,807 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:55,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:55,810 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:55,873 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-03-10 22:02:55,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:55,874 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:345, output treesize:67 [2021-03-10 22:02:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:55,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:55,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:02:55,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850190795] [2021-03-10 22:02:55,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:02:55,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:55,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:02:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:55,987 INFO L87 Difference]: Start difference. First operand 739 states and 2522 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,345 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 22:02:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:56,933 INFO L93 Difference]: Finished difference Result 1089 states and 3382 transitions. [2021-03-10 22:02:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:02:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:56,936 INFO L225 Difference]: With dead ends: 1089 [2021-03-10 22:02:56,936 INFO L226 Difference]: Without dead ends: 1031 [2021-03-10 22:02:56,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1010.2ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:02:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-03-10 22:02:56,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 739. [2021-03-10 22:02:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.4173441734417342) internal successors, (2522), 738 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2522 transitions. [2021-03-10 22:02:56,946 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2522 transitions. Word has length 19 [2021-03-10 22:02:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:56,946 INFO L480 AbstractCegarLoop]: Abstraction has 739 states and 2522 transitions. [2021-03-10 22:02:56,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2522 transitions. [2021-03-10 22:02:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:56,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:56,947 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:57,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2279,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:57,147 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash 907255270, now seen corresponding path program 129 times [2021-03-10 22:02:57,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:57,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603269209] [2021-03-10 22:02:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:57,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603269209] [2021-03-10 22:02:57,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120533984] [2021-03-10 22:02:57,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:57,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:57,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:57,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:57,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:57,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:57,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:57,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:57,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:57,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:57,548 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:57,550 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,616 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:02:57,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:57,617 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 22:02:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:57,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:57,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:57,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173199988] [2021-03-10 22:02:57,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:57,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:57,717 INFO L87 Difference]: Start difference. First operand 739 states and 2522 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,170 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-03-10 22:02:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:58,537 INFO L93 Difference]: Finished difference Result 969 states and 3169 transitions. [2021-03-10 22:02:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:02:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:58,539 INFO L225 Difference]: With dead ends: 969 [2021-03-10 22:02:58,539 INFO L226 Difference]: Without dead ends: 947 [2021-03-10 22:02:58,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 839.5ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:02:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-03-10 22:02:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 737. [2021-03-10 22:02:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.4144021739130435) internal successors, (2513), 736 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2513 transitions. [2021-03-10 22:02:58,548 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2513 transitions. Word has length 19 [2021-03-10 22:02:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:58,548 INFO L480 AbstractCegarLoop]: Abstraction has 737 states and 2513 transitions. [2021-03-10 22:02:58,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2513 transitions. [2021-03-10 22:02:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:58,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:58,549 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:58,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2298 [2021-03-10 22:02:58,750 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:58,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1808334554, now seen corresponding path program 130 times [2021-03-10 22:02:58,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:58,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658351767] [2021-03-10 22:02:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:58,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658351767] [2021-03-10 22:02:58,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83963260] [2021-03-10 22:02:58,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:58,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:58,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:58,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:02:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:59,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:59,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:59,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:59,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:59,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:59,085 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:59,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:59,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:59,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:59,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:59,105 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:59,109 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:59,113 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:59,116 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:59,120 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:59,124 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:59,128 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:59,131 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:59,134 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,321 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:02:59,322 INFO L628 ElimStorePlain]: treesize reduction 37, result has 85.7 percent of original size [2021-03-10 22:02:59,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:02:59,323 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:779, output treesize:222 [2021-03-10 22:02:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:59,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:59,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:02:59,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161236744] [2021-03-10 22:02:59,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:59,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:59,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:59,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:59,542 INFO L87 Difference]: Start difference. First operand 737 states and 2513 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:00,142 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:03:00,524 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 22:03:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:00,880 INFO L93 Difference]: Finished difference Result 1085 states and 3405 transitions. [2021-03-10 22:03:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:03:00,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:00,883 INFO L225 Difference]: With dead ends: 1085 [2021-03-10 22:03:00,883 INFO L226 Difference]: Without dead ends: 1007 [2021-03-10 22:03:00,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1417.4ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:03:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-03-10 22:03:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 738. [2021-03-10 22:03:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.417910447761194) internal successors, (2519), 737 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2519 transitions. [2021-03-10 22:03:00,897 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2519 transitions. Word has length 19 [2021-03-10 22:03:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:00,897 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 2519 transitions. [2021-03-10 22:03:00,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2519 transitions. [2021-03-10 22:03:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:00,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:00,898 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:01,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2314 [2021-03-10 22:03:01,099 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1392980930, now seen corresponding path program 131 times [2021-03-10 22:03:01,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:01,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883129248] [2021-03-10 22:03:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:01,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883129248] [2021-03-10 22:03:01,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558196523] [2021-03-10 22:03:01,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:01,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:01,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:01,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:01,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:01,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:01,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:01,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:01,443 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:01,448 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:01,452 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:01,455 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:01,460 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:01,464 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:01,467 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:01,471 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:01,475 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:01,478 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:01,482 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:01,486 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:01,489 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:01,492 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:01,682 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:03:01,682 INFO L628 ElimStorePlain]: treesize reduction 37, result has 85.7 percent of original size [2021-03-10 22:03:01,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:01,684 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:779, output treesize:222 [2021-03-10 22:03:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:01,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:01,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:01,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571082581] [2021-03-10 22:03:01,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:01,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:01,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:01,966 INFO L87 Difference]: Start difference. First operand 738 states and 2519 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:02,597 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:03:02,877 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-10 22:03:03,110 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 22:03:03,309 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-10 22:03:03,440 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-03-10 22:03:03,596 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 22:03:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:03,708 INFO L93 Difference]: Finished difference Result 1002 states and 3184 transitions. [2021-03-10 22:03:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:03:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:03,710 INFO L225 Difference]: With dead ends: 1002 [2021-03-10 22:03:03,710 INFO L226 Difference]: Without dead ends: 981 [2021-03-10 22:03:03,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1855.4ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:03:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-03-10 22:03:03,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 738. [2021-03-10 22:03:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.417910447761194) internal successors, (2519), 737 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2519 transitions. [2021-03-10 22:03:03,720 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2519 transitions. Word has length 19 [2021-03-10 22:03:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:03,720 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 2519 transitions. [2021-03-10 22:03:03,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2519 transitions. [2021-03-10 22:03:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:03,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:03,721 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:03,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2334 [2021-03-10 22:03:03,922 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:03,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:03,922 INFO L82 PathProgramCache]: Analyzing trace with hash 45289400, now seen corresponding path program 132 times [2021-03-10 22:03:03,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:03,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411070577] [2021-03-10 22:03:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:04,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411070577] [2021-03-10 22:03:04,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840742932] [2021-03-10 22:03:04,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:04,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:04,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:04,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:04,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:04,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:04,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:04,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:04,358 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:04,361 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:04,364 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:04,367 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:04,370 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,432 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:03:04,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:04,433 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:333, output treesize:67 [2021-03-10 22:03:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:04,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:04,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:04,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523217104] [2021-03-10 22:03:04,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:04,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:04,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:04,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:04,529 INFO L87 Difference]: Start difference. First operand 738 states and 2519 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:05,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:05,426 INFO L93 Difference]: Finished difference Result 1104 states and 3433 transitions. [2021-03-10 22:03:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:03:05,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:05,427 INFO L225 Difference]: With dead ends: 1104 [2021-03-10 22:03:05,427 INFO L226 Difference]: Without dead ends: 1031 [2021-03-10 22:03:05,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1001.6ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:03:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-03-10 22:03:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 741. [2021-03-10 22:03:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.424324324324324) internal successors, (2534), 740 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2534 transitions. [2021-03-10 22:03:05,437 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2534 transitions. Word has length 19 [2021-03-10 22:03:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:05,437 INFO L480 AbstractCegarLoop]: Abstraction has 741 states and 2534 transitions. [2021-03-10 22:03:05,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2534 transitions. [2021-03-10 22:03:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:05,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:05,438 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:05,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2360,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:05,638 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:05,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:05,639 INFO L82 PathProgramCache]: Analyzing trace with hash 796689838, now seen corresponding path program 133 times [2021-03-10 22:03:05,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:05,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472287441] [2021-03-10 22:03:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:05,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472287441] [2021-03-10 22:03:05,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644076825] [2021-03-10 22:03:05,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:06,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:06,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:06,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:06,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:06,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:06,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:06,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:06,029 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:06,033 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-10 22:03:06,037 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:06,041 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:06,045 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:06,049 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:06,053 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:06,057 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:06,061 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:06,064 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:06,068 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:06,072 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:06,077 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:06,081 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:06,085 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:06,089 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:06,299 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 22:03:06,299 INFO L628 ElimStorePlain]: treesize reduction 138, result has 61.7 percent of original size [2021-03-10 22:03:06,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:06,301 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:917, output treesize:222 [2021-03-10 22:03:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:06,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:06,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:06,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994526038] [2021-03-10 22:03:06,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:06,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:06,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:06,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:06,533 INFO L87 Difference]: Start difference. First operand 741 states and 2534 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,142 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:03:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:07,459 INFO L93 Difference]: Finished difference Result 1054 states and 3357 transitions. [2021-03-10 22:03:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:03:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:07,461 INFO L225 Difference]: With dead ends: 1054 [2021-03-10 22:03:07,461 INFO L226 Difference]: Without dead ends: 1011 [2021-03-10 22:03:07,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1040.2ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-03-10 22:03:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 742. [2021-03-10 22:03:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.427800269905533) internal successors, (2540), 741 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2540 transitions. [2021-03-10 22:03:07,471 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2540 transitions. Word has length 19 [2021-03-10 22:03:07,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:07,472 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2540 transitions. [2021-03-10 22:03:07,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2540 transitions. [2021-03-10 22:03:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:07,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:07,473 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:07,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2380 [2021-03-10 22:03:07,673 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2089032238, now seen corresponding path program 134 times [2021-03-10 22:03:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:07,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903936240] [2021-03-10 22:03:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:07,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903936240] [2021-03-10 22:03:07,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888153602] [2021-03-10 22:03:07,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:07,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:07,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:07,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:07,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:08,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:08,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:08,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:08,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:08,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:08,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:08,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:08,064 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:08,068 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:08,073 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:08,077 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:08,082 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:08,086 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:08,090 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:08,093 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:08,097 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:08,101 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:08,104 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:08,107 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,299 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:03:08,299 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 22:03:08,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:08,301 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:763, output treesize:222 [2021-03-10 22:03:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:08,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:08,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:08,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659575341] [2021-03-10 22:03:08,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:08,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:08,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:08,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:08,566 INFO L87 Difference]: Start difference. First operand 742 states and 2540 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:09,209 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:03:09,494 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:03:09,639 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-10 22:03:09,818 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-03-10 22:03:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:09,848 INFO L93 Difference]: Finished difference Result 964 states and 3141 transitions. [2021-03-10 22:03:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:09,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:09,850 INFO L225 Difference]: With dead ends: 964 [2021-03-10 22:03:09,850 INFO L226 Difference]: Without dead ends: 942 [2021-03-10 22:03:09,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1447.4ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-03-10 22:03:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 739. [2021-03-10 22:03:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.421409214092141) internal successors, (2525), 738 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2525 transitions. [2021-03-10 22:03:09,859 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2525 transitions. Word has length 19 [2021-03-10 22:03:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:09,859 INFO L480 AbstractCegarLoop]: Abstraction has 739 states and 2525 transitions. [2021-03-10 22:03:09,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2525 transitions. [2021-03-10 22:03:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:09,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:09,860 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:10,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2403,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:10,061 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:10,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1054966886, now seen corresponding path program 135 times [2021-03-10 22:03:10,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:10,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846855595] [2021-03-10 22:03:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:10,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846855595] [2021-03-10 22:03:10,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098598623] [2021-03-10 22:03:10,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:10,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:10,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:10,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:10,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:10,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:10,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:10,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:10,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:10,450 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:10,453 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:10,456 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:10,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:10,463 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,521 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-03-10 22:03:10,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:10,522 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:03:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:10,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:10,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:03:10,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5468635] [2021-03-10 22:03:10,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:03:10,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:10,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:03:10,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:10,619 INFO L87 Difference]: Start difference. First operand 739 states and 2525 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:11,458 INFO L93 Difference]: Finished difference Result 1201 states and 3810 transitions. [2021-03-10 22:03:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:03:11,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:11,460 INFO L225 Difference]: With dead ends: 1201 [2021-03-10 22:03:11,460 INFO L226 Difference]: Without dead ends: 1173 [2021-03-10 22:03:11,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 909.6ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-03-10 22:03:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 742. [2021-03-10 22:03:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.4237516869095814) internal successors, (2537), 741 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2537 transitions. [2021-03-10 22:03:11,472 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2537 transitions. Word has length 19 [2021-03-10 22:03:11,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:11,472 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2537 transitions. [2021-03-10 22:03:11,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2537 transitions. [2021-03-10 22:03:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:11,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:11,473 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:11,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2426,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:11,673 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:11,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1227644308, now seen corresponding path program 136 times [2021-03-10 22:03:11,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:11,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370237383] [2021-03-10 22:03:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:11,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370237383] [2021-03-10 22:03:11,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145131754] [2021-03-10 22:03:11,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:11,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:11,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:11,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:12,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:12,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:12,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:12,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:12,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:12,129 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:12,132 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:12,135 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,195 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:03:12,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:12,196 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:254, output treesize:67 [2021-03-10 22:03:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:12,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:12,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:12,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007965244] [2021-03-10 22:03:12,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:12,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:12,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:12,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:12,315 INFO L87 Difference]: Start difference. First operand 742 states and 2537 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:12,872 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 22:03:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:13,299 INFO L93 Difference]: Finished difference Result 1145 states and 3670 transitions. [2021-03-10 22:03:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:03:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:13,301 INFO L225 Difference]: With dead ends: 1145 [2021-03-10 22:03:13,301 INFO L226 Difference]: Without dead ends: 1102 [2021-03-10 22:03:13,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1097.6ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:03:13,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-03-10 22:03:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 751. [2021-03-10 22:03:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.428) internal successors, (2571), 750 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2571 transitions. [2021-03-10 22:03:13,311 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2571 transitions. Word has length 19 [2021-03-10 22:03:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:13,311 INFO L480 AbstractCegarLoop]: Abstraction has 751 states and 2571 transitions. [2021-03-10 22:03:13,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2571 transitions. [2021-03-10 22:03:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:13,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:13,312 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:13,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2443 [2021-03-10 22:03:13,512 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash -476243870, now seen corresponding path program 137 times [2021-03-10 22:03:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:13,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675423071] [2021-03-10 22:03:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:13,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675423071] [2021-03-10 22:03:13,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441142488] [2021-03-10 22:03:13,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:13,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:13,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:13,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:13,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:13,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:13,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:13,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:13,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:13,904 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:13,909 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:13,913 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-10 22:03:13,917 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:13,921 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:13,925 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:13,930 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:13,934 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:13,938 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:13,942 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:13,946 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:13,950 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:13,953 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:13,957 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:13,961 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:13,964 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:13,968 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:13,971 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,161 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:03:14,162 INFO L628 ElimStorePlain]: treesize reduction 76, result has 74.5 percent of original size [2021-03-10 22:03:14,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:14,164 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:961, output treesize:222 [2021-03-10 22:03:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:14,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:14,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:03:14,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106864643] [2021-03-10 22:03:14,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:03:14,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:14,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:03:14,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:14,407 INFO L87 Difference]: Start difference. First operand 751 states and 2571 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,158 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-03-10 22:03:15,372 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-03-10 22:03:15,522 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2021-03-10 22:03:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:15,974 INFO L93 Difference]: Finished difference Result 1214 states and 3831 transitions. [2021-03-10 22:03:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:03:15,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:15,977 INFO L225 Difference]: With dead ends: 1214 [2021-03-10 22:03:15,977 INFO L226 Difference]: Without dead ends: 1171 [2021-03-10 22:03:15,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1707.7ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:03:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-03-10 22:03:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 752. [2021-03-10 22:03:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.4314247669773636) internal successors, (2577), 751 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2577 transitions. [2021-03-10 22:03:15,988 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2577 transitions. Word has length 19 [2021-03-10 22:03:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:15,988 INFO L480 AbstractCegarLoop]: Abstraction has 752 states and 2577 transitions. [2021-03-10 22:03:15,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2577 transitions. [2021-03-10 22:03:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:15,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:15,989 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:16,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2461,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:16,189 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:16,190 INFO L82 PathProgramCache]: Analyzing trace with hash 816098530, now seen corresponding path program 138 times [2021-03-10 22:03:16,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:16,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746159100] [2021-03-10 22:03:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:16,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746159100] [2021-03-10 22:03:16,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527011235] [2021-03-10 22:03:16,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:16,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:16,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:03:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:16,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:16,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:16,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:16,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:16,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:16,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:16,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:16,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:16,537 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:16,541 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:16,545 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:16,550 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:16,554 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:16,558 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:16,561 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:16,566 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:16,569 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:16,573 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:16,576 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:16,580 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:16,584 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:16,588 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:16,591 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,741 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 22:03:16,741 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-03-10 22:03:16,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:03:16,743 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-03-10 22:03:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:16,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:16,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:16,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228905006] [2021-03-10 22:03:16,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:16,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:16,973 INFO L87 Difference]: Start difference. First operand 752 states and 2577 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:17,508 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2021-03-10 22:03:17,790 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-03-10 22:03:18,038 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-03-10 22:03:18,212 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-03-10 22:03:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:18,244 INFO L93 Difference]: Finished difference Result 1088 states and 3532 transitions. [2021-03-10 22:03:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:18,247 INFO L225 Difference]: With dead ends: 1088 [2021-03-10 22:03:18,247 INFO L226 Difference]: Without dead ends: 1073 [2021-03-10 22:03:18,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1355.5ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-03-10 22:03:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 748. [2021-03-10 22:03:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.428380187416332) internal successors, (2561), 747 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2561 transitions. [2021-03-10 22:03:18,256 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2561 transitions. Word has length 19 [2021-03-10 22:03:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:18,257 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 2561 transitions. [2021-03-10 22:03:18,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2561 transitions. [2021-03-10 22:03:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:18,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:18,258 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:18,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2479,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:18,458 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:18,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386532, now seen corresponding path program 139 times [2021-03-10 22:03:18,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:18,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967909080] [2021-03-10 22:03:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:18,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967909080] [2021-03-10 22:03:18,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241450832] [2021-03-10 22:03:18,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:18,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:18,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:18,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:18,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:18,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:18,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:18,841 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:03:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:18,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:18,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:18,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652136449] [2021-03-10 22:03:18,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:18,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:18,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:18,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:18,899 INFO L87 Difference]: Start difference. First operand 748 states and 2561 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:19,326 INFO L93 Difference]: Finished difference Result 917 states and 2999 transitions. [2021-03-10 22:03:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:19,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:19,328 INFO L225 Difference]: With dead ends: 917 [2021-03-10 22:03:19,328 INFO L226 Difference]: Without dead ends: 888 [2021-03-10 22:03:19,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 501.4ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:03:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-03-10 22:03:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 748. [2021-03-10 22:03:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.428380187416332) internal successors, (2561), 747 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2561 transitions. [2021-03-10 22:03:19,337 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2561 transitions. Word has length 19 [2021-03-10 22:03:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:19,337 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 2561 transitions. [2021-03-10 22:03:19,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2561 transitions. [2021-03-10 22:03:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:19,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:19,338 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:19,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2503 [2021-03-10 22:03:19,539 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:19,539 INFO L82 PathProgramCache]: Analyzing trace with hash 222948214, now seen corresponding path program 140 times [2021-03-10 22:03:19,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:19,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591180763] [2021-03-10 22:03:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:19,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591180763] [2021-03-10 22:03:19,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936252122] [2021-03-10 22:03:19,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:19,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:19,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:19,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:19,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:19,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:19,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:19,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:19,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:19,881 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:19,884 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,942 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 22:03:19,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:19,943 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:266, output treesize:67 [2021-03-10 22:03:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:20,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:20,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:20,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776076605] [2021-03-10 22:03:20,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:20,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:20,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:20,041 INFO L87 Difference]: Start difference. First operand 748 states and 2561 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:20,548 INFO L93 Difference]: Finished difference Result 919 states and 3008 transitions. [2021-03-10 22:03:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:20,550 INFO L225 Difference]: With dead ends: 919 [2021-03-10 22:03:20,550 INFO L226 Difference]: Without dead ends: 891 [2021-03-10 22:03:20,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:03:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-03-10 22:03:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 748. [2021-03-10 22:03:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.428380187416332) internal successors, (2561), 747 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2561 transitions. [2021-03-10 22:03:20,559 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2561 transitions. Word has length 19 [2021-03-10 22:03:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:20,559 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 2561 transitions. [2021-03-10 22:03:20,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2561 transitions. [2021-03-10 22:03:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:20,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:20,561 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:20,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2515,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:20,775 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:20,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1923222546, now seen corresponding path program 141 times [2021-03-10 22:03:20,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:20,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270886195] [2021-03-10 22:03:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:20,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270886195] [2021-03-10 22:03:20,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214190439] [2021-03-10 22:03:20,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:20,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:20,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:20,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:21,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:21,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:21,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:21,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:21,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:21,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:21,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:21,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:21,123 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:21,127 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:21,130 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:21,133 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:21,137 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:21,139 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,203 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-03-10 22:03:21,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:21,204 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:510, output treesize:67 [2021-03-10 22:03:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:21,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:21,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:21,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354613246] [2021-03-10 22:03:21,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:21,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:21,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:21,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:21,305 INFO L87 Difference]: Start difference. First operand 748 states and 2561 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:21,904 INFO L93 Difference]: Finished difference Result 993 states and 3186 transitions. [2021-03-10 22:03:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:03:21,905 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:21,906 INFO L225 Difference]: With dead ends: 993 [2021-03-10 22:03:21,906 INFO L226 Difference]: Without dead ends: 935 [2021-03-10 22:03:21,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:03:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-03-10 22:03:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 748. [2021-03-10 22:03:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.428380187416332) internal successors, (2561), 747 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2561 transitions. [2021-03-10 22:03:21,915 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2561 transitions. Word has length 19 [2021-03-10 22:03:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:21,915 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 2561 transitions. [2021-03-10 22:03:21,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2561 transitions. [2021-03-10 22:03:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:21,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:21,916 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:22,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2533 [2021-03-10 22:03:22,117 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash -813003666, now seen corresponding path program 142 times [2021-03-10 22:03:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:22,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345892951] [2021-03-10 22:03:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:22,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345892951] [2021-03-10 22:03:22,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309217905] [2021-03-10 22:03:22,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:22,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:22,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:22,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:22,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:22,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:22,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:22,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:22,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:22,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-03-10 22:03:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:22,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:22,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:22,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5351283] [2021-03-10 22:03:22,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:22,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:22,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:22,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:22,544 INFO L87 Difference]: Start difference. First operand 748 states and 2561 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:23,094 INFO L93 Difference]: Finished difference Result 947 states and 3079 transitions. [2021-03-10 22:03:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:23,096 INFO L225 Difference]: With dead ends: 947 [2021-03-10 22:03:23,096 INFO L226 Difference]: Without dead ends: 918 [2021-03-10 22:03:23,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 604.3ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:03:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-03-10 22:03:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 749. [2021-03-10 22:03:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.4318181818181817) internal successors, (2567), 748 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2567 transitions. [2021-03-10 22:03:23,105 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2567 transitions. Word has length 19 [2021-03-10 22:03:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:23,105 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 2567 transitions. [2021-03-10 22:03:23,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2567 transitions. [2021-03-10 22:03:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:23,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:23,106 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:23,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2553 [2021-03-10 22:03:23,307 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2041525312, now seen corresponding path program 143 times [2021-03-10 22:03:23,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:23,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801611078] [2021-03-10 22:03:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:23,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801611078] [2021-03-10 22:03:23,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135990528] [2021-03-10 22:03:23,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:23,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:23,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:23,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:23,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:23,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:23,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:23,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:23,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:23,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:23,688 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:23,692 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:23,695 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,755 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-03-10 22:03:23,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:23,756 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:03:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:23,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:23,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:23,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772621470] [2021-03-10 22:03:23,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:23,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:23,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:23,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:23,846 INFO L87 Difference]: Start difference. First operand 749 states and 2567 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:24,373 INFO L93 Difference]: Finished difference Result 956 states and 3110 transitions. [2021-03-10 22:03:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:24,375 INFO L225 Difference]: With dead ends: 956 [2021-03-10 22:03:24,375 INFO L226 Difference]: Without dead ends: 928 [2021-03-10 22:03:24,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:03:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-03-10 22:03:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 751. [2021-03-10 22:03:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.4346666666666668) internal successors, (2576), 750 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2576 transitions. [2021-03-10 22:03:24,384 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2576 transitions. Word has length 19 [2021-03-10 22:03:24,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:24,384 INFO L480 AbstractCegarLoop]: Abstraction has 751 states and 2576 transitions. [2021-03-10 22:03:24,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,384 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2576 transitions. [2021-03-10 22:03:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:24,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:24,385 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:24,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-03-10 22:03:24,585 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash 369762414, now seen corresponding path program 144 times [2021-03-10 22:03:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:24,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807522772] [2021-03-10 22:03:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:24,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807522772] [2021-03-10 22:03:24,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472627680] [2021-03-10 22:03:24,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:24,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:24,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:24,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:24,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:24,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:24,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:24,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:24,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:24,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:24,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:24,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:24,948 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:24,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:24,951 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:24,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:24,953 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:25,020 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:03:25,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:03:25,021 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 22:03:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:25,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:25,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:25,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526067244] [2021-03-10 22:03:25,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:25,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:25,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:25,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:25,130 INFO L87 Difference]: Start difference. First operand 751 states and 2576 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:25,482 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 22:03:25,678 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-03-10 22:03:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:25,806 INFO L93 Difference]: Finished difference Result 950 states and 3089 transitions. [2021-03-10 22:03:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:25,808 INFO L225 Difference]: With dead ends: 950 [2021-03-10 22:03:25,808 INFO L226 Difference]: Without dead ends: 928 [2021-03-10 22:03:25,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:03:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-03-10 22:03:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 749. [2021-03-10 22:03:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.4318181818181817) internal successors, (2567), 748 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2567 transitions. [2021-03-10 22:03:25,818 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2567 transitions. Word has length 19 [2021-03-10 22:03:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:25,818 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 2567 transitions. [2021-03-10 22:03:25,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2567 transitions. [2021-03-10 22:03:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:25,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:25,819 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:26,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2580,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:26,019 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:26,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1949139886, now seen corresponding path program 145 times [2021-03-10 22:03:26,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:26,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045145599] [2021-03-10 22:03:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:26,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045145599] [2021-03-10 22:03:26,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593604581] [2021-03-10 22:03:26,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:26,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:26,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:26,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:26,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:26,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:26,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:26,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:26,386 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:26,391 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:26,395 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:26,400 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:26,404 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:26,407 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:26,411 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:26,416 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:26,419 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:26,423 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:26,427 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:26,431 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:26,434 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:26,438 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:26,441 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:26,445 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:26,462 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:26,466 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:26,470 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:26,473 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,667 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:03:26,667 INFO L628 ElimStorePlain]: treesize reduction 101, result has 68.7 percent of original size [2021-03-10 22:03:26,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:26,669 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-03-10 22:03:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:26,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:26,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:26,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608610771] [2021-03-10 22:03:26,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:26,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:26,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:26,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:26,890 INFO L87 Difference]: Start difference. First operand 749 states and 2567 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:27,553 INFO L93 Difference]: Finished difference Result 1097 states and 3462 transitions. [2021-03-10 22:03:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:03:27,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:27,555 INFO L225 Difference]: With dead ends: 1097 [2021-03-10 22:03:27,555 INFO L226 Difference]: Without dead ends: 1054 [2021-03-10 22:03:27,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 796.6ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:03:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-03-10 22:03:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 750. [2021-03-10 22:03:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.4352469959946594) internal successors, (2573), 749 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2573 transitions. [2021-03-10 22:03:27,565 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2573 transitions. Word has length 19 [2021-03-10 22:03:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:27,565 INFO L480 AbstractCegarLoop]: Abstraction has 750 states and 2573 transitions. [2021-03-10 22:03:27,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2573 transitions. [2021-03-10 22:03:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:27,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:27,566 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:27,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2594,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:27,767 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1053485010, now seen corresponding path program 146 times [2021-03-10 22:03:27,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:27,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328911535] [2021-03-10 22:03:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:27,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328911535] [2021-03-10 22:03:27,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367300849] [2021-03-10 22:03:27,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:27,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:27,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:27,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:27,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:28,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:28,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:28,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:28,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:28,112 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:28,117 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:28,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:28,127 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:28,131 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:28,135 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:28,140 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:28,144 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:28,149 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:28,152 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:28,156 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:28,161 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:28,166 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:28,170 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:28,173 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:28,177 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:28,181 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:28,185 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:28,188 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:28,192 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:28,196 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:28,390 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:03:28,390 INFO L628 ElimStorePlain]: treesize reduction 101, result has 68.7 percent of original size [2021-03-10 22:03:28,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:28,392 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-03-10 22:03:28,510 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:03:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:28,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:28,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:28,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671183404] [2021-03-10 22:03:28,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:28,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:28,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:28,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:28,687 INFO L87 Difference]: Start difference. First operand 750 states and 2573 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:29,449 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:03:29,654 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 22:03:29,775 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 22:03:29,944 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:03:30,132 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 22:03:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:30,244 INFO L93 Difference]: Finished difference Result 1122 states and 3523 transitions. [2021-03-10 22:03:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:03:30,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:30,247 INFO L225 Difference]: With dead ends: 1122 [2021-03-10 22:03:30,247 INFO L226 Difference]: Without dead ends: 1085 [2021-03-10 22:03:30,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1685.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:03:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-03-10 22:03:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 751. [2021-03-10 22:03:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.4386666666666668) internal successors, (2579), 750 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2579 transitions. [2021-03-10 22:03:30,258 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2579 transitions. Word has length 19 [2021-03-10 22:03:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:30,258 INFO L480 AbstractCegarLoop]: Abstraction has 751 states and 2579 transitions. [2021-03-10 22:03:30,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2579 transitions. [2021-03-10 22:03:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:30,259 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:30,259 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:30,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2611,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:30,459 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:30,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash -492203456, now seen corresponding path program 147 times [2021-03-10 22:03:30,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:30,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152951372] [2021-03-10 22:03:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:30,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152951372] [2021-03-10 22:03:30,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635591241] [2021-03-10 22:03:30,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:30,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:30,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:30,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:30,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:30,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:30,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:30,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:30,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:30,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:30,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:30,916 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:30,926 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:30,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:30,933 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:30,936 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:30,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:30,939 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:31,003 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-03-10 22:03:31,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:31,004 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-03-10 22:03:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:31,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:31,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:31,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208320850] [2021-03-10 22:03:31,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:31,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:31,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:31,149 INFO L87 Difference]: Start difference. First operand 751 states and 2579 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:31,724 INFO L93 Difference]: Finished difference Result 981 states and 3202 transitions. [2021-03-10 22:03:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:03:31,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:31,727 INFO L225 Difference]: With dead ends: 981 [2021-03-10 22:03:31,727 INFO L226 Difference]: Without dead ends: 953 [2021-03-10 22:03:31,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 719.5ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:03:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-03-10 22:03:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 754. [2021-03-10 22:03:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.444887118193891) internal successors, (2594), 753 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2594 transitions. [2021-03-10 22:03:31,736 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2594 transitions. Word has length 19 [2021-03-10 22:03:31,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:31,736 INFO L480 AbstractCegarLoop]: Abstraction has 754 states and 2594 transitions. [2021-03-10 22:03:31,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2594 transitions. [2021-03-10 22:03:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:31,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:31,737 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:31,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-03-10 22:03:31,938 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash 259196982, now seen corresponding path program 148 times [2021-03-10 22:03:31,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:31,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88892396] [2021-03-10 22:03:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:32,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88892396] [2021-03-10 22:03:32,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997775816] [2021-03-10 22:03:32,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:32,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:32,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:32,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:32,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:32,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:32,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:32,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:32,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:32,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:32,281 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:32,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:32,289 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:32,293 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:32,297 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:32,301 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:32,305 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:32,309 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:32,313 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:32,317 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:32,321 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:32,324 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:32,328 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:32,332 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,526 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:03:32,526 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-03-10 22:03:32,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:32,528 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:03:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:32,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:32,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:32,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865719498] [2021-03-10 22:03:32,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:32,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:32,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:32,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:32,747 INFO L87 Difference]: Start difference. First operand 754 states and 2594 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:33,517 INFO L93 Difference]: Finished difference Result 1107 states and 3488 transitions. [2021-03-10 22:03:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:03:33,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:33,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:33,519 INFO L225 Difference]: With dead ends: 1107 [2021-03-10 22:03:33,519 INFO L226 Difference]: Without dead ends: 1064 [2021-03-10 22:03:33,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 862.6ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-03-10 22:03:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 755. [2021-03-10 22:03:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.4482758620689653) internal successors, (2600), 754 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2600 transitions. [2021-03-10 22:03:33,529 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2600 transitions. Word has length 19 [2021-03-10 22:03:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:33,530 INFO L480 AbstractCegarLoop]: Abstraction has 755 states and 2600 transitions. [2021-03-10 22:03:33,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2600 transitions. [2021-03-10 22:03:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:33,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:33,531 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:33,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2648 [2021-03-10 22:03:33,731 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:33,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:33,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1551539382, now seen corresponding path program 149 times [2021-03-10 22:03:33,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:33,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675685070] [2021-03-10 22:03:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:33,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675685070] [2021-03-10 22:03:33,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412738652] [2021-03-10 22:03:33,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:33,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:33,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:33,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:03:33,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:34,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:34,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:34,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:34,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:34,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:34,121 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:34,124 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:34,128 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:34,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:34,135 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:34,139 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:34,143 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:34,146 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:34,150 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:34,154 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:34,158 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:34,162 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,310 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:03:34,310 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-03-10 22:03:34,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:03:34,312 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-03-10 22:03:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:34,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:34,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:34,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219602773] [2021-03-10 22:03:34,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:34,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:34,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:34,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:34,534 INFO L87 Difference]: Start difference. First operand 755 states and 2600 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:35,091 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 22:03:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:35,241 INFO L93 Difference]: Finished difference Result 1013 states and 3267 transitions. [2021-03-10 22:03:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:03:35,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:35,243 INFO L225 Difference]: With dead ends: 1013 [2021-03-10 22:03:35,243 INFO L226 Difference]: Without dead ends: 998 [2021-03-10 22:03:35,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 847.4ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:03:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-03-10 22:03:35,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 753. [2021-03-10 22:03:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.445478723404255) internal successors, (2591), 752 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2591 transitions. [2021-03-10 22:03:35,252 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2591 transitions. Word has length 19 [2021-03-10 22:03:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:35,252 INFO L480 AbstractCegarLoop]: Abstraction has 753 states and 2591 transitions. [2021-03-10 22:03:35,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2591 transitions. [2021-03-10 22:03:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:35,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:35,253 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:35,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2666 [2021-03-10 22:03:35,454 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2085937374, now seen corresponding path program 150 times [2021-03-10 22:03:35,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:35,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801985690] [2021-03-10 22:03:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:35,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801985690] [2021-03-10 22:03:35,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391145312] [2021-03-10 22:03:35,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:35,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:35,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:35,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:35,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:35,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:35,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:35,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:35,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:35,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:35,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:35,871 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:76, output treesize:35 [2021-03-10 22:03:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:35,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:35,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:35,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650168283] [2021-03-10 22:03:35,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:35,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:35,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:35,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:35,918 INFO L87 Difference]: Start difference. First operand 753 states and 2591 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:36,420 INFO L93 Difference]: Finished difference Result 1018 states and 3298 transitions. [2021-03-10 22:03:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:36,422 INFO L225 Difference]: With dead ends: 1018 [2021-03-10 22:03:36,422 INFO L226 Difference]: Without dead ends: 989 [2021-03-10 22:03:36,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 611.9ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:03:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-03-10 22:03:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 755. [2021-03-10 22:03:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.4509283819628647) internal successors, (2602), 754 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2602 transitions. [2021-03-10 22:03:36,431 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2602 transitions. Word has length 19 [2021-03-10 22:03:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:36,431 INFO L480 AbstractCegarLoop]: Abstraction has 755 states and 2602 transitions. [2021-03-10 22:03:36,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2602 transitions. [2021-03-10 22:03:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:36,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:36,432 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:36,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2690,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:36,632 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash 768591604, now seen corresponding path program 151 times [2021-03-10 22:03:36,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:36,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747648932] [2021-03-10 22:03:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:36,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747648932] [2021-03-10 22:03:36,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580956023] [2021-03-10 22:03:36,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:36,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:36,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:37,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:37,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:37,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:37,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:37,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:37,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:37,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:37,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:37,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:37,081 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:37,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:37,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:37,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:37,087 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:37,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:37,091 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:37,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:37,094 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:37,153 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-03-10 22:03:37,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:37,154 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:03:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:37,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:37,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:37,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138309029] [2021-03-10 22:03:37,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:37,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:37,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:37,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:37,247 INFO L87 Difference]: Start difference. First operand 755 states and 2602 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:38,043 INFO L93 Difference]: Finished difference Result 1075 states and 3434 transitions. [2021-03-10 22:03:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:03:38,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:38,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:38,046 INFO L225 Difference]: With dead ends: 1075 [2021-03-10 22:03:38,046 INFO L226 Difference]: Without dead ends: 1032 [2021-03-10 22:03:38,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 908.2ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:03:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-03-10 22:03:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 759. [2021-03-10 22:03:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.453825857519789) internal successors, (2618), 758 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2618 transitions. [2021-03-10 22:03:38,055 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2618 transitions. Word has length 19 [2021-03-10 22:03:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:38,055 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2618 transitions. [2021-03-10 22:03:38,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2618 transitions. [2021-03-10 22:03:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:38,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:38,056 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:38,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2702,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:38,257 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash -903171294, now seen corresponding path program 152 times [2021-03-10 22:03:38,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:38,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079210373] [2021-03-10 22:03:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:38,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079210373] [2021-03-10 22:03:38,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389804598] [2021-03-10 22:03:38,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:38,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:38,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:38,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:38,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:38,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:38,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:38,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:38,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:38,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:38,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:38,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:38,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:38,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:38,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:38,642 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:38,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:38,645 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:38,713 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-03-10 22:03:38,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:03:38,715 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-03-10 22:03:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:38,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:38,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:38,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042319712] [2021-03-10 22:03:38,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:38,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:38,808 INFO L87 Difference]: Start difference. First operand 759 states and 2618 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:39,189 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 22:03:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:39,471 INFO L93 Difference]: Finished difference Result 1160 states and 3668 transitions. [2021-03-10 22:03:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:03:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:39,473 INFO L225 Difference]: With dead ends: 1160 [2021-03-10 22:03:39,473 INFO L226 Difference]: Without dead ends: 1088 [2021-03-10 22:03:39,473 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 745.7ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-03-10 22:03:39,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 759. [2021-03-10 22:03:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.453825857519789) internal successors, (2618), 758 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2618 transitions. [2021-03-10 22:03:39,483 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2618 transitions. Word has length 19 [2021-03-10 22:03:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:39,483 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2618 transitions. [2021-03-10 22:03:39,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2618 transitions. [2021-03-10 22:03:39,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:39,484 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:39,484 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:39,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2720,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:39,685 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:39,685 INFO L82 PathProgramCache]: Analyzing trace with hash 676206178, now seen corresponding path program 153 times [2021-03-10 22:03:39,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:39,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833532206] [2021-03-10 22:03:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:39,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833532206] [2021-03-10 22:03:39,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587465857] [2021-03-10 22:03:39,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:39,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:03:39,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:39,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:39,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:40,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:40,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:40,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:40,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:40,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:40,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:40,049 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:40,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:40,057 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:40,062 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:40,066 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:40,071 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:40,075 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:40,080 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:40,084 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:40,087 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:40,091 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:40,095 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:40,099 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:40,103 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:40,107 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:40,111 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:40,114 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:40,118 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:40,122 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:40,328 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 22:03:40,328 INFO L628 ElimStorePlain]: treesize reduction 130, result has 63.1 percent of original size [2021-03-10 22:03:40,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:40,330 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1063, output treesize:222 [2021-03-10 22:03:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:40,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:40,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:40,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798161171] [2021-03-10 22:03:40,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:40,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:40,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:40,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:40,557 INFO L87 Difference]: Start difference. First operand 759 states and 2618 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:40,866 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-10 22:03:41,182 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 22:03:41,610 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 22:03:42,030 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 22:03:42,534 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-03-10 22:03:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:42,555 INFO L93 Difference]: Finished difference Result 1445 states and 4381 transitions. [2021-03-10 22:03:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:03:42,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:42,557 INFO L225 Difference]: With dead ends: 1445 [2021-03-10 22:03:42,557 INFO L226 Difference]: Without dead ends: 1340 [2021-03-10 22:03:42,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2018.2ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:03:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-03-10 22:03:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 766. [2021-03-10 22:03:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.469281045751634) internal successors, (2654), 765 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2654 transitions. [2021-03-10 22:03:42,573 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2654 transitions. Word has length 19 [2021-03-10 22:03:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:42,573 INFO L480 AbstractCegarLoop]: Abstraction has 766 states and 2654 transitions. [2021-03-10 22:03:42,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2654 transitions. [2021-03-10 22:03:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:42,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:42,574 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:42,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2736,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:42,774 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:42,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1091559802, now seen corresponding path program 154 times [2021-03-10 22:03:42,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:42,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264277882] [2021-03-10 22:03:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:42,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264277882] [2021-03-10 22:03:42,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932987122] [2021-03-10 22:03:42,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:42,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:42,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:42,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:42,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:43,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:43,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:43,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:43,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:43,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:43,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:43,119 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:43,123 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:43,128 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:43,132 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:43,138 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:43,142 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:43,147 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:43,152 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:43,157 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:43,161 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:43,165 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:43,169 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:43,173 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,381 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:03:43,381 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-03-10 22:03:43,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:43,383 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:03:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:43,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:43,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:43,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342849035] [2021-03-10 22:03:43,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:43,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:43,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:43,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:43,654 INFO L87 Difference]: Start difference. First operand 766 states and 2654 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:44,119 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 22:03:44,292 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:03:44,433 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 22:03:44,550 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 22:03:44,694 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 22:03:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:44,731 INFO L93 Difference]: Finished difference Result 1058 states and 3420 transitions. [2021-03-10 22:03:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:03:44,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:44,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:44,734 INFO L225 Difference]: With dead ends: 1058 [2021-03-10 22:03:44,734 INFO L226 Difference]: Without dead ends: 1037 [2021-03-10 22:03:44,734 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1265.0ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-03-10 22:03:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 764. [2021-03-10 22:03:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.4665792922673657) internal successors, (2645), 763 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2645 transitions. [2021-03-10 22:03:44,743 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2645 transitions. Word has length 19 [2021-03-10 22:03:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:44,744 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2645 transitions. [2021-03-10 22:03:44,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2645 transitions. [2021-03-10 22:03:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:44,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:44,745 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:44,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2755,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:44,945 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1242772622, now seen corresponding path program 155 times [2021-03-10 22:03:44,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:44,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748913228] [2021-03-10 22:03:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:45,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748913228] [2021-03-10 22:03:45,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727888955] [2021-03-10 22:03:45,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:45,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:45,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:45,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:45,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:45,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:45,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:45,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:45,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:45,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:45,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:45,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:45,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:45,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:45,349 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.4 percent of original size [2021-03-10 22:03:45,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:03:45,350 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:158, output treesize:83 [2021-03-10 22:03:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:45,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:45,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:45,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694007379] [2021-03-10 22:03:45,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:45,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:45,535 INFO L87 Difference]: Start difference. First operand 764 states and 2645 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:46,313 INFO L93 Difference]: Finished difference Result 1164 states and 3799 transitions. [2021-03-10 22:03:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:03:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:46,315 INFO L225 Difference]: With dead ends: 1164 [2021-03-10 22:03:46,315 INFO L226 Difference]: Without dead ends: 1107 [2021-03-10 22:03:46,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:03:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-03-10 22:03:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 769. [2021-03-10 22:03:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.4713541666666665) internal successors, (2666), 768 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2666 transitions. [2021-03-10 22:03:46,324 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2666 transitions. Word has length 19 [2021-03-10 22:03:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:46,324 INFO L480 AbstractCegarLoop]: Abstraction has 769 states and 2666 transitions. [2021-03-10 22:03:46,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:46,324 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2666 transitions. [2021-03-10 22:03:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:46,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:46,325 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:46,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2777 [2021-03-10 22:03:46,535 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:46,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1313268294, now seen corresponding path program 156 times [2021-03-10 22:03:46,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:46,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564386733] [2021-03-10 22:03:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:46,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564386733] [2021-03-10 22:03:46,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487961061] [2021-03-10 22:03:46,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:46,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:46,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:46,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:46,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:46,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:46,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:46,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:46,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:46,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:46,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:46,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:46,847 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:46,851 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:46,854 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:46,858 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:46,861 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:46,865 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:46,980 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:03:46,980 INFO L628 ElimStorePlain]: treesize reduction 78, result has 63.0 percent of original size [2021-03-10 22:03:46,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:03:46,981 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:442, output treesize:133 [2021-03-10 22:03:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:47,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:47,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:47,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950188625] [2021-03-10 22:03:47,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:47,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:47,278 INFO L87 Difference]: Start difference. First operand 769 states and 2666 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:47,597 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 22:03:47,742 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 22:03:47,968 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 22:03:48,322 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:03:48,635 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-03-10 22:03:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:48,789 INFO L93 Difference]: Finished difference Result 1211 states and 3798 transitions. [2021-03-10 22:03:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:03:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:48,791 INFO L225 Difference]: With dead ends: 1211 [2021-03-10 22:03:48,791 INFO L226 Difference]: Without dead ends: 1133 [2021-03-10 22:03:48,791 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1662.9ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:03:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-03-10 22:03:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 768. [2021-03-10 22:03:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.4615384615384617) internal successors, (2655), 767 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2655 transitions. [2021-03-10 22:03:48,801 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2655 transitions. Word has length 19 [2021-03-10 22:03:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:48,802 INFO L480 AbstractCegarLoop]: Abstraction has 768 states and 2655 transitions. [2021-03-10 22:03:48,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2655 transitions. [2021-03-10 22:03:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:48,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:48,803 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2791,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:49,003 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1681207660, now seen corresponding path program 157 times [2021-03-10 22:03:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364662794] [2021-03-10 22:03:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364662794] [2021-03-10 22:03:49,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127711390] [2021-03-10 22:03:49,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:49,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:49,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:49,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:49,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:49,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:49,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:49,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:49,385 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:49,388 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:49,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:49,396 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:49,399 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:49,402 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:49,406 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:49,408 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:49,475 INFO L628 ElimStorePlain]: treesize reduction 75, result has 47.2 percent of original size [2021-03-10 22:03:49,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:49,476 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:510, output treesize:67 [2021-03-10 22:03:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:49,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:49,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765580267] [2021-03-10 22:03:49,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:49,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:49,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:49,593 INFO L87 Difference]: Start difference. First operand 768 states and 2655 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,312 INFO L93 Difference]: Finished difference Result 1065 states and 3452 transitions. [2021-03-10 22:03:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:03:50,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,314 INFO L225 Difference]: With dead ends: 1065 [2021-03-10 22:03:50,314 INFO L226 Difference]: Without dead ends: 1022 [2021-03-10 22:03:50,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 723.6ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-03-10 22:03:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 774. [2021-03-10 22:03:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.4695989650711514) internal successors, (2682), 773 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2682 transitions. [2021-03-10 22:03:50,324 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2682 transitions. Word has length 19 [2021-03-10 22:03:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,324 INFO L480 AbstractCegarLoop]: Abstraction has 774 states and 2682 transitions. [2021-03-10 22:03:50,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2682 transitions. [2021-03-10 22:03:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:50,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,325 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2807,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:50,525 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1862359198, now seen corresponding path program 158 times [2021-03-10 22:03:50,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048049010] [2021-03-10 22:03:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048049010] [2021-03-10 22:03:50,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814997870] [2021-03-10 22:03:50,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:50,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:50,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:50,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:50,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:50,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:50,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:50,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:50,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:50,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:50,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:50,912 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:50,916 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-10 22:03:50,921 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:50,925 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:50,929 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:50,933 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:50,938 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:50,942 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:50,946 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:50,950 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:50,953 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:50,957 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:50,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:50,961 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:51,160 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:03:51,161 INFO L628 ElimStorePlain]: treesize reduction 105, result has 67.9 percent of original size [2021-03-10 22:03:51,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:51,163 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:739, output treesize:222 [2021-03-10 22:03:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:51,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:51,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:51,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938381761] [2021-03-10 22:03:51,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:51,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:51,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:51,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:51,394 INFO L87 Difference]: Start difference. First operand 774 states and 2682 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,480 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-03-10 22:03:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:52,500 INFO L93 Difference]: Finished difference Result 1222 states and 3824 transitions. [2021-03-10 22:03:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:03:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:52,502 INFO L225 Difference]: With dead ends: 1222 [2021-03-10 22:03:52,502 INFO L226 Difference]: Without dead ends: 1179 [2021-03-10 22:03:52,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1244.0ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:03:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-03-10 22:03:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 775. [2021-03-10 22:03:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.4728682170542635) internal successors, (2688), 774 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2688 transitions. [2021-03-10 22:03:52,513 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2688 transitions. Word has length 19 [2021-03-10 22:03:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:52,513 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 2688 transitions. [2021-03-10 22:03:52,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2688 transitions. [2021-03-10 22:03:52,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:52,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:52,514 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:52,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2827,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:52,714 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:52,715 INFO L82 PathProgramCache]: Analyzing trace with hash -570016798, now seen corresponding path program 159 times [2021-03-10 22:03:52,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:52,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893044496] [2021-03-10 22:03:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893044496] [2021-03-10 22:03:52,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230551054] [2021-03-10 22:03:52,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:52,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:52,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:52,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:53,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:53,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:53,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:53,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:53,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:53,079 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:53,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:53,088 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:53,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:53,097 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:53,101 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:53,105 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:53,109 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:53,113 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:53,125 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:53,129 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:53,133 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:53,137 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:53,140 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,337 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:03:53,337 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 22:03:53,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:03:53,339 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:763, output treesize:222 [2021-03-10 22:03:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:53,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:53,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:53,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312490706] [2021-03-10 22:03:53,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:53,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:53,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:53,622 INFO L87 Difference]: Start difference. First operand 775 states and 2688 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:54,393 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:03:54,598 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 22:03:54,730 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-03-10 22:03:54,912 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 22:03:55,093 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 22:03:55,269 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-10 22:03:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:55,322 INFO L93 Difference]: Finished difference Result 1195 states and 3790 transitions. [2021-03-10 22:03:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:03:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:55,324 INFO L225 Difference]: With dead ends: 1195 [2021-03-10 22:03:55,324 INFO L226 Difference]: Without dead ends: 1173 [2021-03-10 22:03:55,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1843.4ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:03:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-03-10 22:03:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 773. [2021-03-10 22:03:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.4702072538860103) internal successors, (2679), 772 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2679 transitions. [2021-03-10 22:03:55,341 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2679 transitions. Word has length 19 [2021-03-10 22:03:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:55,341 INFO L480 AbstractCegarLoop]: Abstraction has 773 states and 2679 transitions. [2021-03-10 22:03:55,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2679 transitions. [2021-03-10 22:03:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:55,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:55,342 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:55,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2847,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:55,542 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash -102306258, now seen corresponding path program 160 times [2021-03-10 22:03:55,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:55,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198826474] [2021-03-10 22:03:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:55,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198826474] [2021-03-10 22:03:55,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018663602] [2021-03-10 22:03:55,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:55,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:55,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:03:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:55,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:55,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:55,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:55,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:55,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:55,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:55,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:55,893 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:55,897 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:55,901 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:55,905 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:55,909 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:55,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:55,914 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,048 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:03:56,048 INFO L628 ElimStorePlain]: treesize reduction 74, result has 64.3 percent of original size [2021-03-10 22:03:56,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:03:56,050 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:424, output treesize:133 [2021-03-10 22:03:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:56,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:56,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:03:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819242245] [2021-03-10 22:03:56,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:56,343 INFO L87 Difference]: Start difference. First operand 773 states and 2679 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:56,705 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 22:03:56,976 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-10 22:03:57,255 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 22:03:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:57,369 INFO L93 Difference]: Finished difference Result 1205 states and 3826 transitions. [2021-03-10 22:03:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:03:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:57,372 INFO L225 Difference]: With dead ends: 1205 [2021-03-10 22:03:57,372 INFO L226 Difference]: Without dead ends: 1162 [2021-03-10 22:03:57,372 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1166.7ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-03-10 22:03:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 779. [2021-03-10 22:03:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.475578406169666) internal successors, (2704), 778 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2704 transitions. [2021-03-10 22:03:57,382 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2704 transitions. Word has length 19 [2021-03-10 22:03:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:57,382 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 2704 transitions. [2021-03-10 22:03:57,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2704 transitions. [2021-03-10 22:03:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:57,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:57,383 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:57,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2869,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:57,583 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1190036142, now seen corresponding path program 161 times [2021-03-10 22:03:57,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:57,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716700810] [2021-03-10 22:03:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:57,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716700810] [2021-03-10 22:03:57,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625723117] [2021-03-10 22:03:57,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:57,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:57,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:57,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:03:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:57,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:57,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:57,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:57,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:57,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:57,874 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:03:57,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:57,881 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:57,884 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:57,888 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:57,891 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:58,019 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 22:03:58,019 INFO L628 ElimStorePlain]: treesize reduction 48, result has 75.1 percent of original size [2021-03-10 22:03:58,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:03:58,021 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:313, output treesize:145 [2021-03-10 22:03:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:58,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:58,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:03:58,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847090269] [2021-03-10 22:03:58,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:03:58,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:58,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:03:58,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:58,383 INFO L87 Difference]: Start difference. First operand 779 states and 2704 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,830 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 22:03:59,036 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 22:03:59,278 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-03-10 22:03:59,457 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 22:03:59,675 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-03-10 22:03:59,922 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-03-10 22:04:00,096 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-03-10 22:04:00,308 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-10 22:04:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:00,693 INFO L93 Difference]: Finished difference Result 1301 states and 4067 transitions. [2021-03-10 22:04:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:04:00,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:00,695 INFO L225 Difference]: With dead ends: 1301 [2021-03-10 22:04:00,695 INFO L226 Difference]: Without dead ends: 1264 [2021-03-10 22:04:00,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2407.3ms TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:04:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-03-10 22:04:00,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 778. [2021-03-10 22:04:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 3.472329472329472) internal successors, (2698), 777 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2698 transitions. [2021-03-10 22:04:00,706 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2698 transitions. Word has length 19 [2021-03-10 22:04:00,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:00,706 INFO L480 AbstractCegarLoop]: Abstraction has 778 states and 2698 transitions. [2021-03-10 22:04:00,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2698 transitions. [2021-03-10 22:04:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:00,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:00,707 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:00,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2890,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:00,908 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:00,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:00,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1230708288, now seen corresponding path program 162 times [2021-03-10 22:04:00,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:00,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044625038] [2021-03-10 22:04:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044625038] [2021-03-10 22:04:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407756227] [2021-03-10 22:04:01,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:01,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:01,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:01,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:01,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:01,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:01,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:01,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:01,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:01,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:01,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:01,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:01,262 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:01,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:01,269 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:01,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:01,276 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:01,279 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:01,415 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 22:04:01,416 INFO L628 ElimStorePlain]: treesize reduction 93, result has 58.8 percent of original size [2021-03-10 22:04:01,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:04:01,417 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:418, output treesize:133 [2021-03-10 22:04:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:01,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:04:01,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231775516] [2021-03-10 22:04:01,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:01,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:01,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:01,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:01,678 INFO L87 Difference]: Start difference. First operand 778 states and 2698 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,153 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:04:02,298 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 22:04:02,421 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 22:04:02,625 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 22:04:02,891 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:04:03,091 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-03-10 22:04:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:03,501 INFO L93 Difference]: Finished difference Result 1269 states and 4062 transitions. [2021-03-10 22:04:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:04:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:03,503 INFO L225 Difference]: With dead ends: 1269 [2021-03-10 22:04:03,503 INFO L226 Difference]: Without dead ends: 1232 [2021-03-10 22:04:03,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1845.0ms TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:04:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-03-10 22:04:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 776. [2021-03-10 22:04:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.472258064516129) internal successors, (2691), 775 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2691 transitions. [2021-03-10 22:04:03,514 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2691 transitions. Word has length 19 [2021-03-10 22:04:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:03,514 INFO L480 AbstractCegarLoop]: Abstraction has 776 states and 2691 transitions. [2021-03-10 22:04:03,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2691 transitions. [2021-03-10 22:04:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:03,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:03,515 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:03,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2915 [2021-03-10 22:04:03,715 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash -288765254, now seen corresponding path program 163 times [2021-03-10 22:04:03,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:03,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230475164] [2021-03-10 22:04:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:03,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230475164] [2021-03-10 22:04:03,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767007273] [2021-03-10 22:04:03,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:03,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:03,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:04,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:04,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:04,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:04,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:04,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:04,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:04,152 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:04,155 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:04,158 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:04,161 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:04,165 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:04,167 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:04,170 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:04,234 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-03-10 22:04:04,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:04,235 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:472, output treesize:67 [2021-03-10 22:04:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:04,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:04,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:04:04,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436841181] [2021-03-10 22:04:04,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:04,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:04,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:04,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:04,342 INFO L87 Difference]: Start difference. First operand 776 states and 2691 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,829 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-10 22:04:04,967 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2021-03-10 22:04:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:04,999 INFO L93 Difference]: Finished difference Result 1173 states and 3812 transitions. [2021-03-10 22:04:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:04,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:05,001 INFO L225 Difference]: With dead ends: 1173 [2021-03-10 22:04:05,001 INFO L226 Difference]: Without dead ends: 1145 [2021-03-10 22:04:05,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-03-10 22:04:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 782. [2021-03-10 22:04:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.47247119078105) internal successors, (2712), 781 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2712 transitions. [2021-03-10 22:04:05,011 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2712 transitions. Word has length 19 [2021-03-10 22:04:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:05,011 INFO L480 AbstractCegarLoop]: Abstraction has 782 states and 2712 transitions. [2021-03-10 22:04:05,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2712 transitions. [2021-03-10 22:04:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:05,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:05,012 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:05,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:05,213 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1723590848, now seen corresponding path program 164 times [2021-03-10 22:04:05,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:05,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745016476] [2021-03-10 22:04:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:05,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745016476] [2021-03-10 22:04:05,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831039351] [2021-03-10 22:04:05,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:05,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:05,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:05,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:05,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:05,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:05,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:05,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:05,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:05,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:05,649 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:05,652 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:05,656 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:05,659 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,719 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-03-10 22:04:05,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:05,720 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-03-10 22:04:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:05,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:05,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:04:05,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285420837] [2021-03-10 22:04:05,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:05,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:05,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:05,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:05,814 INFO L87 Difference]: Start difference. First operand 782 states and 2712 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,290 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-10 22:04:06,421 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2021-03-10 22:04:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:06,498 INFO L93 Difference]: Finished difference Result 1222 states and 3945 transitions. [2021-03-10 22:04:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:06,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:06,500 INFO L225 Difference]: With dead ends: 1222 [2021-03-10 22:04:06,500 INFO L226 Difference]: Without dead ends: 1179 [2021-03-10 22:04:06,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 824.5ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-03-10 22:04:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 785. [2021-03-10 22:04:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.4783163265306123) internal successors, (2727), 784 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2727 transitions. [2021-03-10 22:04:06,510 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2727 transitions. Word has length 19 [2021-03-10 22:04:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:06,510 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 2727 transitions. [2021-03-10 22:04:06,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2727 transitions. [2021-03-10 22:04:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:06,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:06,511 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:06,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2958,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:06,712 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1819976010, now seen corresponding path program 165 times [2021-03-10 22:04:06,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:06,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378326034] [2021-03-10 22:04:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:06,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378326034] [2021-03-10 22:04:06,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111474181] [2021-03-10 22:04:06,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:06,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:06,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:07,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:07,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:07,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:07,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:07,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:07,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:07,112 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:07,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:07,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:07,125 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:07,129 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:07,133 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:07,137 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:07,141 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:07,144 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:07,148 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:07,152 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:07,155 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:07,158 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:07,362 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:04:07,362 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 22:04:07,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:04:07,364 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:763, output treesize:222 [2021-03-10 22:04:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:07,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:07,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:04:07,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077478497] [2021-03-10 22:04:07,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:07,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:07,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:07,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:07,591 INFO L87 Difference]: Start difference. First operand 785 states and 2727 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,239 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-03-10 22:04:08,425 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-03-10 22:04:08,576 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2021-03-10 22:04:08,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:08,716 INFO L93 Difference]: Finished difference Result 1291 states and 4106 transitions. [2021-03-10 22:04:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:08,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:08,718 INFO L225 Difference]: With dead ends: 1291 [2021-03-10 22:04:08,718 INFO L226 Difference]: Without dead ends: 1248 [2021-03-10 22:04:08,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1273.3ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:04:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-10 22:04:08,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 786. [2021-03-10 22:04:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.481528662420382) internal successors, (2733), 785 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2733 transitions. [2021-03-10 22:04:08,728 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2733 transitions. Word has length 19 [2021-03-10 22:04:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:08,728 INFO L480 AbstractCegarLoop]: Abstraction has 786 states and 2733 transitions. [2021-03-10 22:04:08,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2733 transitions. [2021-03-10 22:04:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:08,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:08,729 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:08,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2975 [2021-03-10 22:04:08,930 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:08,930 INFO L82 PathProgramCache]: Analyzing trace with hash -527633610, now seen corresponding path program 166 times [2021-03-10 22:04:08,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:08,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164812729] [2021-03-10 22:04:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:09,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164812729] [2021-03-10 22:04:09,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847972772] [2021-03-10 22:04:09,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:09,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:09,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:09,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:09,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:09,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:09,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:09,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:09,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:09,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:09,319 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:09,324 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:09,328 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:09,333 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:09,338 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:09,342 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:09,346 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:09,350 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:09,355 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:09,358 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:09,362 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:09,366 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:09,369 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:09,576 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:04:09,576 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-03-10 22:04:09,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:04:09,578 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-03-10 22:04:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:09,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:09,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:04:09,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223034300] [2021-03-10 22:04:09,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:09,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:09,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:09,864 INFO L87 Difference]: Start difference. First operand 786 states and 2733 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,567 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-03-10 22:04:10,922 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-03-10 22:04:11,162 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-03-10 22:04:11,365 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2021-03-10 22:04:11,675 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-03-10 22:04:11,875 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-03-10 22:04:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:11,981 INFO L93 Difference]: Finished difference Result 1212 states and 3930 transitions. [2021-03-10 22:04:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:04:11,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:11,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:11,984 INFO L225 Difference]: With dead ends: 1212 [2021-03-10 22:04:11,984 INFO L226 Difference]: Without dead ends: 1190 [2021-03-10 22:04:11,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2226.8ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:04:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-03-10 22:04:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 780. [2021-03-10 22:04:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.472400513478819) internal successors, (2705), 779 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2705 transitions. [2021-03-10 22:04:11,994 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2705 transitions. Word has length 19 [2021-03-10 22:04:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:11,994 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2705 transitions. [2021-03-10 22:04:11,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2705 transitions. [2021-03-10 22:04:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:11,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:11,996 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:12,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-03-10 22:04:12,196 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash 874968376, now seen corresponding path program 167 times [2021-03-10 22:04:12,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:12,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099455760] [2021-03-10 22:04:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099455760] [2021-03-10 22:04:12,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505178095] [2021-03-10 22:04:12,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:12,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:12,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:12,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:12,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:12,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:12,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:12,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:12,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:12,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:12,652 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:12,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:12,659 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:12,662 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:12,666 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:12,669 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:12,672 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:12,737 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-03-10 22:04:12,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:12,738 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:460, output treesize:67 [2021-03-10 22:04:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:12,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:04:12,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312218993] [2021-03-10 22:04:12,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:12,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:12,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:12,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:12,841 INFO L87 Difference]: Start difference. First operand 780 states and 2705 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:13,586 INFO L93 Difference]: Finished difference Result 1145 states and 3730 transitions. [2021-03-10 22:04:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:13,588 INFO L225 Difference]: With dead ends: 1145 [2021-03-10 22:04:13,588 INFO L226 Difference]: Without dead ends: 1117 [2021-03-10 22:04:13,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 854.9ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:04:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-03-10 22:04:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 786. [2021-03-10 22:04:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.480254777070064) internal successors, (2732), 785 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2732 transitions. [2021-03-10 22:04:13,598 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2732 transitions. Word has length 19 [2021-03-10 22:04:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:13,598 INFO L480 AbstractCegarLoop]: Abstraction has 786 states and 2732 transitions. [2021-03-10 22:04:13,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2732 transitions. [2021-03-10 22:04:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:13,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:13,599 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:13,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3016 [2021-03-10 22:04:13,800 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1626368814, now seen corresponding path program 168 times [2021-03-10 22:04:13,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:13,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126006872] [2021-03-10 22:04:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:13,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126006872] [2021-03-10 22:04:13,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537880500] [2021-03-10 22:04:13,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:14,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:14,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:14,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:04:14,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:14,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:14,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:14,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:14,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:14,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:14,165 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:14,170 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:14,176 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:14,181 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:14,186 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:14,191 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:14,196 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:14,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:14,206 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:14,210 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:14,215 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:14,218 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:14,223 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:14,227 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:14,231 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:14,236 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:14,240 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:14,244 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:14,423 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 22:04:14,424 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-03-10 22:04:14,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:04:14,425 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-03-10 22:04:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:14,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:14,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:04:14,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977211963] [2021-03-10 22:04:14,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:14,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:14,626 INFO L87 Difference]: Start difference. First operand 786 states and 2732 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,047 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 22:04:15,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:15,332 INFO L93 Difference]: Finished difference Result 1217 states and 3913 transitions. [2021-03-10 22:04:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:15,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:15,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:15,334 INFO L225 Difference]: With dead ends: 1217 [2021-03-10 22:04:15,334 INFO L226 Difference]: Without dead ends: 1202 [2021-03-10 22:04:15,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 835.7ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-03-10 22:04:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 787. [2021-03-10 22:04:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.4834605597964376) internal successors, (2738), 786 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2738 transitions. [2021-03-10 22:04:15,344 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2738 transitions. Word has length 19 [2021-03-10 22:04:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:15,344 INFO L480 AbstractCegarLoop]: Abstraction has 787 states and 2738 transitions. [2021-03-10 22:04:15,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2738 transitions. [2021-03-10 22:04:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:15,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:15,345 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:15,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-03-10 22:04:15,546 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1044260714, now seen corresponding path program 169 times [2021-03-10 22:04:15,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:15,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962225933] [2021-03-10 22:04:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:15,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962225933] [2021-03-10 22:04:15,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060510796] [2021-03-10 22:04:15,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:15,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:15,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:15,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:15,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:15,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:15,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:15,945 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:15,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:15,971 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:15,975 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:15,980 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:15,984 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:15,988 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:15,992 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:15,996 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:15,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:16,000 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:16,004 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:16,008 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:16,012 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:16,015 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,216 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:04:16,216 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-03-10 22:04:16,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:04:16,218 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:763, output treesize:222 [2021-03-10 22:04:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:16,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:16,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:04:16,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981497314] [2021-03-10 22:04:16,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:16,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:16,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:16,507 INFO L87 Difference]: Start difference. First operand 787 states and 2738 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:17,026 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-10 22:04:17,372 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-03-10 22:04:17,612 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 22:04:17,780 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-10 22:04:17,990 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-10 22:04:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:18,026 INFO L93 Difference]: Finished difference Result 1208 states and 3889 transitions. [2021-03-10 22:04:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:18,029 INFO L225 Difference]: With dead ends: 1208 [2021-03-10 22:04:18,029 INFO L226 Difference]: Without dead ends: 1186 [2021-03-10 22:04:18,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1764.2ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:04:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-03-10 22:04:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 784. [2021-03-10 22:04:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.4776500638569603) internal successors, (2723), 783 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2723 transitions. [2021-03-10 22:04:18,039 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2723 transitions. Word has length 19 [2021-03-10 22:04:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:18,039 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 2723 transitions. [2021-03-10 22:04:18,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,039 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2723 transitions. [2021-03-10 22:04:18,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:18,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:18,040 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:18,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3053 [2021-03-10 22:04:18,241 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash -908545542, now seen corresponding path program 170 times [2021-03-10 22:04:18,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:18,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300984266] [2021-03-10 22:04:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:18,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300984266] [2021-03-10 22:04:18,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123114657] [2021-03-10 22:04:18,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:18,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:18,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:18,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:18,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:18,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:18,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:18,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:18,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:18,557 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:18,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:18,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:18,568 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:18,571 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:18,574 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:18,578 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:18,581 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,696 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:04:18,697 INFO L628 ElimStorePlain]: treesize reduction 80, result has 62.4 percent of original size [2021-03-10 22:04:18,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:04:18,698 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:436, output treesize:133 [2021-03-10 22:04:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:19,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:19,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:04:19,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508958705] [2021-03-10 22:04:19,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:19,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:19,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:19,000 INFO L87 Difference]: Start difference. First operand 784 states and 2723 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:19,416 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 22:04:19,696 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 22:04:19,857 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-10 22:04:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:20,060 INFO L93 Difference]: Finished difference Result 1333 states and 4231 transitions. [2021-03-10 22:04:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:04:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:20,062 INFO L225 Difference]: With dead ends: 1333 [2021-03-10 22:04:20,062 INFO L226 Difference]: Without dead ends: 1290 [2021-03-10 22:04:20,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1237.3ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:04:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-03-10 22:04:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 790. [2021-03-10 22:04:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.482889733840304) internal successors, (2748), 789 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2748 transitions. [2021-03-10 22:04:20,073 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2748 transitions. Word has length 19 [2021-03-10 22:04:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:20,073 INFO L480 AbstractCegarLoop]: Abstraction has 790 states and 2748 transitions. [2021-03-10 22:04:20,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:20,073 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2748 transitions. [2021-03-10 22:04:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:20,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:20,074 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:20,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-03-10 22:04:20,275 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:20,275 INFO L82 PathProgramCache]: Analyzing trace with hash 383796858, now seen corresponding path program 171 times [2021-03-10 22:04:20,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:20,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875557487] [2021-03-10 22:04:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:20,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875557487] [2021-03-10 22:04:20,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017858391] [2021-03-10 22:04:20,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:20,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:20,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:20,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:20,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:20,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:20,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:20,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:20,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:20,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:20,600 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:20,604 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:20,608 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:20,612 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:20,616 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:20,619 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:20,623 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:20,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:20,742 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:04:20,743 INFO L628 ElimStorePlain]: treesize reduction 78, result has 63.0 percent of original size [2021-03-10 22:04:20,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:04:20,744 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:442, output treesize:133 [2021-03-10 22:04:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:21,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:21,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:04:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838743630] [2021-03-10 22:04:21,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:21,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:21,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:21,050 INFO L87 Difference]: Start difference. First operand 790 states and 2748 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:21,500 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 22:04:21,811 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 22:04:22,065 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-10 22:04:22,258 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-03-10 22:04:22,389 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-03-10 22:04:22,596 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-03-10 22:04:22,744 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-10 22:04:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:22,805 INFO L93 Difference]: Finished difference Result 1324 states and 4202 transitions. [2021-03-10 22:04:22,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:04:22,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:22,807 INFO L225 Difference]: With dead ends: 1324 [2021-03-10 22:04:22,807 INFO L226 Difference]: Without dead ends: 1287 [2021-03-10 22:04:22,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1857.9ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:04:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-03-10 22:04:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 789. [2021-03-10 22:04:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.479695431472081) internal successors, (2742), 788 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2742 transitions. [2021-03-10 22:04:22,818 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2742 transitions. Word has length 19 [2021-03-10 22:04:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:22,818 INFO L480 AbstractCegarLoop]: Abstraction has 789 states and 2742 transitions. [2021-03-10 22:04:22,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2742 transitions. [2021-03-10 22:04:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:22,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:22,819 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:23,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:23,019 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:23,020 INFO L82 PathProgramCache]: Analyzing trace with hash 424469004, now seen corresponding path program 172 times [2021-03-10 22:04:23,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:23,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018952554] [2021-03-10 22:04:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:23,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018952554] [2021-03-10 22:04:23,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392062983] [2021-03-10 22:04:23,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:23,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:23,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:23,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:23,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:23,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:23,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:23,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:23,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:23,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:23,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:23,301 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,414 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:04:23,415 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-03-10 22:04:23,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:04:23,416 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:233, output treesize:133 [2021-03-10 22:04:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:23,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:23,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-03-10 22:04:23,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692584610] [2021-03-10 22:04:23,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:23,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:23,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:23,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:23,632 INFO L87 Difference]: Start difference. First operand 789 states and 2742 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,029 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:04:24,195 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-03-10 22:04:24,467 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-03-10 22:04:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:24,495 INFO L93 Difference]: Finished difference Result 1245 states and 3995 transitions. [2021-03-10 22:04:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:24,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:24,497 INFO L225 Difference]: With dead ends: 1245 [2021-03-10 22:04:24,498 INFO L226 Difference]: Without dead ends: 1195 [2021-03-10 22:04:24,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 926.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-03-10 22:04:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 800. [2021-03-10 22:04:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.5018773466833544) internal successors, (2798), 799 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2798 transitions. [2021-03-10 22:04:24,508 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2798 transitions. Word has length 19 [2021-03-10 22:04:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:24,509 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 2798 transitions. [2021-03-10 22:04:24,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2798 transitions. [2021-03-10 22:04:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:24,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:24,510 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:24,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3114,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:24,710 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash 248990922, now seen corresponding path program 173 times [2021-03-10 22:04:24,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:24,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536287276] [2021-03-10 22:04:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:24,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536287276] [2021-03-10 22:04:24,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835214666] [2021-03-10 22:04:24,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:24,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:24,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:24,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:24,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:24,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:24,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:24,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:24,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:24,986 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:24,990 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:04:24,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:24,997 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:25,000 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:25,004 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:25,007 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:25,010 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,127 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:04:25,127 INFO L628 ElimStorePlain]: treesize reduction 80, result has 62.4 percent of original size [2021-03-10 22:04:25,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:04:25,129 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:436, output treesize:133 [2021-03-10 22:04:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:25,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:25,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-03-10 22:04:25,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629224311] [2021-03-10 22:04:25,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:25,340 INFO L87 Difference]: Start difference. First operand 800 states and 2798 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:25,751 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 22:04:25,976 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 22:04:26,250 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-03-10 22:04:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:26,281 INFO L93 Difference]: Finished difference Result 1258 states and 4027 transitions. [2021-03-10 22:04:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:26,283 INFO L225 Difference]: With dead ends: 1258 [2021-03-10 22:04:26,283 INFO L226 Difference]: Without dead ends: 1208 [2021-03-10 22:04:26,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1002.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-03-10 22:04:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 799. [2021-03-10 22:04:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.49874686716792) internal successors, (2792), 798 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2792 transitions. [2021-03-10 22:04:26,294 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2792 transitions. Word has length 19 [2021-03-10 22:04:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:26,294 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 2792 transitions. [2021-03-10 22:04:26,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2792 transitions. [2021-03-10 22:04:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:26,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:26,295 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:26,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:26,496 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:26,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1018466256, now seen corresponding path program 174 times [2021-03-10 22:04:26,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:26,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810624366] [2021-03-10 22:04:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:26,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810624366] [2021-03-10 22:04:26,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103969609] [2021-03-10 22:04:26,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:26,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:26,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:26,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:26,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:26,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:26,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:26,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:26,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:26,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:26,831 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:26,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:26,865 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:79 [2021-03-10 22:04:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:27,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:27,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:04:27,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048443456] [2021-03-10 22:04:27,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:27,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:27,010 INFO L87 Difference]: Start difference. First operand 799 states and 2792 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,357 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 22:04:27,497 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-10 22:04:27,630 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:04:27,885 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-03-10 22:04:28,027 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 22:04:28,230 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:04:28,414 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 22:04:28,557 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-03-10 22:04:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:28,597 INFO L93 Difference]: Finished difference Result 1254 states and 4006 transitions. [2021-03-10 22:04:28,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:04:28,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:28,599 INFO L225 Difference]: With dead ends: 1254 [2021-03-10 22:04:28,599 INFO L226 Difference]: Without dead ends: 1233 [2021-03-10 22:04:28,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1568.4ms TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:04:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-03-10 22:04:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 803. [2021-03-10 22:04:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.4987531172069826) internal successors, (2806), 802 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2806 transitions. [2021-03-10 22:04:28,609 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2806 transitions. Word has length 19 [2021-03-10 22:04:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:28,609 INFO L480 AbstractCegarLoop]: Abstraction has 803 states and 2806 transitions. [2021-03-10 22:04:28,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2806 transitions. [2021-03-10 22:04:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:04:28,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:28,610 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:28,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-03-10 22:04:28,811 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:28,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2079244346, now seen corresponding path program 175 times [2021-03-10 22:04:28,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:28,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912240156] [2021-03-10 22:04:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:28,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912240156] [2021-03-10 22:04:28,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288459769] [2021-03-10 22:04:28,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:28,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:04:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:04:29,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:29,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:29,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:04:29,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:04:29,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:29,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:29,112 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:79 [2021-03-10 22:04:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:29,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:29,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-03-10 22:04:29,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104694726] [2021-03-10 22:04:29,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:29,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:29,240 INFO L87 Difference]: Start difference. First operand 803 states and 2806 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,601 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 22:04:29,831 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-03-10 22:04:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:29,854 INFO L93 Difference]: Finished difference Result 1143 states and 3697 transitions. [2021-03-10 22:04:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:29,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:04:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:29,856 INFO L225 Difference]: With dead ends: 1143 [2021-03-10 22:04:29,856 INFO L226 Difference]: Without dead ends: 1093 [2021-03-10 22:04:29,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 659.2ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-03-10 22:04:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 811. [2021-03-10 22:04:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.4864197530864196) internal successors, (2824), 810 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2824 transitions. [2021-03-10 22:04:29,866 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2824 transitions. Word has length 19 [2021-03-10 22:04:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:29,866 INFO L480 AbstractCegarLoop]: Abstraction has 811 states and 2824 transitions. [2021-03-10 22:04:29,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2824 transitions. [2021-03-10 22:04:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:29,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:29,867 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:30,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:30,067 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:30,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:30,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2146836536, now seen corresponding path program 2 times [2021-03-10 22:04:30,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:30,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045675950] [2021-03-10 22:04:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:04:30,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045675950] [2021-03-10 22:04:30,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695994381] [2021-03-10 22:04:30,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:30,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:30,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:30,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:04:30,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:30,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-03-10 22:04:30,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997399419] [2021-03-10 22:04:30,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:04:30,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:30,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:04:30,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:04:30,207 INFO L87 Difference]: Start difference. First operand 811 states and 2824 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:30,286 INFO L93 Difference]: Finished difference Result 1098 states and 3703 transitions. [2021-03-10 22:04:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:04:30,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:30,288 INFO L225 Difference]: With dead ends: 1098 [2021-03-10 22:04:30,288 INFO L226 Difference]: Without dead ends: 935 [2021-03-10 22:04:30,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:30,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-03-10 22:04:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 866. [2021-03-10 22:04:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.4728323699421964) internal successors, (3004), 865 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3004 transitions. [2021-03-10 22:04:30,298 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3004 transitions. Word has length 20 [2021-03-10 22:04:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:30,298 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 3004 transitions. [2021-03-10 22:04:30,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3004 transitions. [2021-03-10 22:04:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:30,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:30,299 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:30,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-03-10 22:04:30,499 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1544491944, now seen corresponding path program 176 times [2021-03-10 22:04:30,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:30,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837614843] [2021-03-10 22:04:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:30,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837614843] [2021-03-10 22:04:30,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396107198] [2021-03-10 22:04:30,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:30,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:30,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:30,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:30,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:30,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:04:30,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180570756] [2021-03-10 22:04:30,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:04:30,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:30,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:04:30,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:30,659 INFO L87 Difference]: Start difference. First operand 866 states and 3004 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:30,894 INFO L93 Difference]: Finished difference Result 1146 states and 3754 transitions. [2021-03-10 22:04:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:30,896 INFO L225 Difference]: With dead ends: 1146 [2021-03-10 22:04:30,896 INFO L226 Difference]: Without dead ends: 1146 [2021-03-10 22:04:30,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-03-10 22:04:30,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 879. [2021-03-10 22:04:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.469248291571754) internal successors, (3046), 878 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 3046 transitions. [2021-03-10 22:04:30,906 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 3046 transitions. Word has length 20 [2021-03-10 22:04:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:30,906 INFO L480 AbstractCegarLoop]: Abstraction has 879 states and 3046 transitions. [2021-03-10 22:04:30,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 3046 transitions. [2021-03-10 22:04:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:30,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:30,907 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:31,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3188,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:31,115 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:31,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1192264290, now seen corresponding path program 177 times [2021-03-10 22:04:31,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:31,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485591252] [2021-03-10 22:04:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:31,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485591252] [2021-03-10 22:04:31,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248667898] [2021-03-10 22:04:31,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:31,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:31,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:31,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:31,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:31,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110387509] [2021-03-10 22:04:31,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:31,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:31,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:31,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:31,328 INFO L87 Difference]: Start difference. First operand 879 states and 3046 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:31,640 INFO L93 Difference]: Finished difference Result 1130 states and 3717 transitions. [2021-03-10 22:04:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:31,642 INFO L225 Difference]: With dead ends: 1130 [2021-03-10 22:04:31,642 INFO L226 Difference]: Without dead ends: 1130 [2021-03-10 22:04:31,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-03-10 22:04:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 882. [2021-03-10 22:04:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.466515323496027) internal successors, (3054), 881 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 3054 transitions. [2021-03-10 22:04:31,652 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 3054 transitions. Word has length 20 [2021-03-10 22:04:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:31,652 INFO L480 AbstractCegarLoop]: Abstraction has 882 states and 3054 transitions. [2021-03-10 22:04:31,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 3054 transitions. [2021-03-10 22:04:31,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:31,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:31,653 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:31,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3191,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:31,854 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:31,854 INFO L82 PathProgramCache]: Analyzing trace with hash 83046008, now seen corresponding path program 178 times [2021-03-10 22:04:31,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:31,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648876509] [2021-03-10 22:04:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:31,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648876509] [2021-03-10 22:04:31,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378909658] [2021-03-10 22:04:31,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:31,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:31,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:31,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:32,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:32,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026851828] [2021-03-10 22:04:32,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:32,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:32,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:32,035 INFO L87 Difference]: Start difference. First operand 882 states and 3054 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:32,328 INFO L93 Difference]: Finished difference Result 1126 states and 3710 transitions. [2021-03-10 22:04:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:32,330 INFO L225 Difference]: With dead ends: 1126 [2021-03-10 22:04:32,330 INFO L226 Difference]: Without dead ends: 1126 [2021-03-10 22:04:32,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-03-10 22:04:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 882. [2021-03-10 22:04:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.466515323496027) internal successors, (3054), 881 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 3054 transitions. [2021-03-10 22:04:32,340 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 3054 transitions. Word has length 20 [2021-03-10 22:04:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:32,340 INFO L480 AbstractCegarLoop]: Abstraction has 882 states and 3054 transitions. [2021-03-10 22:04:32,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 3054 transitions. [2021-03-10 22:04:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:32,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:32,341 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:32,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3193 [2021-03-10 22:04:32,542 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash 876210668, now seen corresponding path program 179 times [2021-03-10 22:04:32,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:32,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871545184] [2021-03-10 22:04:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871545184] [2021-03-10 22:04:32,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639100143] [2021-03-10 22:04:32,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:32,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:32,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:32,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:32,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:32,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:32,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547072901] [2021-03-10 22:04:32,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:32,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:32,766 INFO L87 Difference]: Start difference. First operand 882 states and 3054 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:33,091 INFO L93 Difference]: Finished difference Result 1075 states and 3568 transitions. [2021-03-10 22:04:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:33,093 INFO L225 Difference]: With dead ends: 1075 [2021-03-10 22:04:33,093 INFO L226 Difference]: Without dead ends: 1075 [2021-03-10 22:04:33,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:33,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-03-10 22:04:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 885. [2021-03-10 22:04:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.4638009049773757) internal successors, (3062), 884 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3062 transitions. [2021-03-10 22:04:33,103 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3062 transitions. Word has length 20 [2021-03-10 22:04:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:33,103 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 3062 transitions. [2021-03-10 22:04:33,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3062 transitions. [2021-03-10 22:04:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:33,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:33,105 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:33,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3198 [2021-03-10 22:04:33,305 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163430, now seen corresponding path program 180 times [2021-03-10 22:04:33,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:33,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762402436] [2021-03-10 22:04:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:33,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762402436] [2021-03-10 22:04:33,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172580402] [2021-03-10 22:04:33,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:33,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:33,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:33,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:33,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:33,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085582004] [2021-03-10 22:04:33,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:33,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:33,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:33,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:33,510 INFO L87 Difference]: Start difference. First operand 885 states and 3062 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:33,802 INFO L93 Difference]: Finished difference Result 1010 states and 3392 transitions. [2021-03-10 22:04:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:33,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:33,804 INFO L225 Difference]: With dead ends: 1010 [2021-03-10 22:04:33,804 INFO L226 Difference]: Without dead ends: 1010 [2021-03-10 22:04:33,804 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-03-10 22:04:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 888. [2021-03-10 22:04:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4611048478015785) internal successors, (3070), 887 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3070 transitions. [2021-03-10 22:04:33,814 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3070 transitions. Word has length 20 [2021-03-10 22:04:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:33,814 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3070 transitions. [2021-03-10 22:04:33,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3070 transitions. [2021-03-10 22:04:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:33,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:33,815 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:34,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3203,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:34,015 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:34,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:34,015 INFO L82 PathProgramCache]: Analyzing trace with hash -359853132, now seen corresponding path program 181 times [2021-03-10 22:04:34,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:34,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567657423] [2021-03-10 22:04:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567657423] [2021-03-10 22:04:34,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601187207] [2021-03-10 22:04:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:34,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:34,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741035045] [2021-03-10 22:04:34,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:34,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:34,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:34,208 INFO L87 Difference]: Start difference. First operand 888 states and 3070 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:34,432 INFO L93 Difference]: Finished difference Result 1036 states and 3463 transitions. [2021-03-10 22:04:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:34,434 INFO L225 Difference]: With dead ends: 1036 [2021-03-10 22:04:34,434 INFO L226 Difference]: Without dead ends: 1036 [2021-03-10 22:04:34,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-03-10 22:04:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 888. [2021-03-10 22:04:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4611048478015785) internal successors, (3070), 887 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3070 transitions. [2021-03-10 22:04:34,443 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3070 transitions. Word has length 20 [2021-03-10 22:04:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:34,443 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3070 transitions. [2021-03-10 22:04:34,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3070 transitions. [2021-03-10 22:04:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:34,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:34,445 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:34,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3206 [2021-03-10 22:04:34,645 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash 433311528, now seen corresponding path program 182 times [2021-03-10 22:04:34,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:34,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750729453] [2021-03-10 22:04:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750729453] [2021-03-10 22:04:34,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783800000] [2021-03-10 22:04:34,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:34,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:34,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:34,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:34,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:34,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:34,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328288304] [2021-03-10 22:04:34,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:34,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:34,844 INFO L87 Difference]: Start difference. First operand 888 states and 3070 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:35,083 INFO L93 Difference]: Finished difference Result 1002 states and 3372 transitions. [2021-03-10 22:04:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:35,084 INFO L225 Difference]: With dead ends: 1002 [2021-03-10 22:04:35,084 INFO L226 Difference]: Without dead ends: 1002 [2021-03-10 22:04:35,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-03-10 22:04:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 885. [2021-03-10 22:04:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.4638009049773757) internal successors, (3062), 884 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3062 transitions. [2021-03-10 22:04:35,094 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3062 transitions. Word has length 20 [2021-03-10 22:04:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:35,094 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 3062 transitions. [2021-03-10 22:04:35,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3062 transitions. [2021-03-10 22:04:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:35,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:35,095 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:35,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-03-10 22:04:35,296 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:35,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1673472592, now seen corresponding path program 183 times [2021-03-10 22:04:35,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:35,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546486049] [2021-03-10 22:04:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:35,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546486049] [2021-03-10 22:04:35,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907584255] [2021-03-10 22:04:35,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:35,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:35,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:35,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:35,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:35,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:35,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:35,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976014176] [2021-03-10 22:04:35,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:35,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:35,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:35,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:35,489 INFO L87 Difference]: Start difference. First operand 885 states and 3062 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:35,790 INFO L93 Difference]: Finished difference Result 1074 states and 3535 transitions. [2021-03-10 22:04:35,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:35,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:35,792 INFO L225 Difference]: With dead ends: 1074 [2021-03-10 22:04:35,792 INFO L226 Difference]: Without dead ends: 1074 [2021-03-10 22:04:35,792 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-03-10 22:04:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 891. [2021-03-10 22:04:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4685393258426966) internal successors, (3087), 890 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3087 transitions. [2021-03-10 22:04:35,801 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3087 transitions. Word has length 20 [2021-03-10 22:04:35,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:35,802 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 3087 transitions. [2021-03-10 22:04:35,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3087 transitions. [2021-03-10 22:04:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:35,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:35,803 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:36,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3216,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:36,003 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash 305325820, now seen corresponding path program 184 times [2021-03-10 22:04:36,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:36,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543759742] [2021-03-10 22:04:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543759742] [2021-03-10 22:04:36,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968954895] [2021-03-10 22:04:36,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:36,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:36,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:36,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:36,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:36,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:36,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508461287] [2021-03-10 22:04:36,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:36,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:36,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:36,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:36,196 INFO L87 Difference]: Start difference. First operand 891 states and 3087 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:36,453 INFO L93 Difference]: Finished difference Result 1005 states and 3377 transitions. [2021-03-10 22:04:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:36,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:36,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:36,454 INFO L225 Difference]: With dead ends: 1005 [2021-03-10 22:04:36,454 INFO L226 Difference]: Without dead ends: 993 [2021-03-10 22:04:36,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-03-10 22:04:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 891. [2021-03-10 22:04:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.465168539325843) internal successors, (3084), 890 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3084 transitions. [2021-03-10 22:04:36,463 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3084 transitions. Word has length 20 [2021-03-10 22:04:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:36,463 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 3084 transitions. [2021-03-10 22:04:36,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3084 transitions. [2021-03-10 22:04:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:36,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:36,464 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:36,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3221,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:36,664 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:36,665 INFO L82 PathProgramCache]: Analyzing trace with hash 475323944, now seen corresponding path program 185 times [2021-03-10 22:04:36,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:36,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931582644] [2021-03-10 22:04:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931582644] [2021-03-10 22:04:36,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873035659] [2021-03-10 22:04:36,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:36,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:36,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:36,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:36,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:36,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:36,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886844929] [2021-03-10 22:04:36,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:36,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:36,857 INFO L87 Difference]: Start difference. First operand 891 states and 3084 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:37,091 INFO L93 Difference]: Finished difference Result 1014 states and 3401 transitions. [2021-03-10 22:04:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:37,093 INFO L225 Difference]: With dead ends: 1014 [2021-03-10 22:04:37,093 INFO L226 Difference]: Without dead ends: 1014 [2021-03-10 22:04:37,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-03-10 22:04:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 885. [2021-03-10 22:04:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.4604072398190047) internal successors, (3059), 884 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3059 transitions. [2021-03-10 22:04:37,103 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3059 transitions. Word has length 20 [2021-03-10 22:04:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:37,103 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 3059 transitions. [2021-03-10 22:04:37,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,103 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3059 transitions. [2021-03-10 22:04:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:37,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:37,104 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:37,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:37,304 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash 969860962, now seen corresponding path program 186 times [2021-03-10 22:04:37,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:37,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420335545] [2021-03-10 22:04:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:37,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420335545] [2021-03-10 22:04:37,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483431362] [2021-03-10 22:04:37,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:37,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:37,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:37,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:37,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:37,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:37,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:37,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615335299] [2021-03-10 22:04:37,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:37,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:37,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:37,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:37,524 INFO L87 Difference]: Start difference. First operand 885 states and 3059 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:37,845 INFO L93 Difference]: Finished difference Result 1009 states and 3373 transitions. [2021-03-10 22:04:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:37,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:37,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:37,847 INFO L225 Difference]: With dead ends: 1009 [2021-03-10 22:04:37,847 INFO L226 Difference]: Without dead ends: 1009 [2021-03-10 22:04:37,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-03-10 22:04:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 891. [2021-03-10 22:04:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.455056179775281) internal successors, (3075), 890 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3075 transitions. [2021-03-10 22:04:37,856 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3075 transitions. Word has length 20 [2021-03-10 22:04:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:37,856 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 3075 transitions. [2021-03-10 22:04:37,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3075 transitions. [2021-03-10 22:04:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:37,857 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:37,857 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:38,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3228,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:38,058 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:38,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:38,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1678219180, now seen corresponding path program 187 times [2021-03-10 22:04:38,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:38,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260946341] [2021-03-10 22:04:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:38,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260946341] [2021-03-10 22:04:38,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319580956] [2021-03-10 22:04:38,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:38,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:38,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:38,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:38,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:38,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075068400] [2021-03-10 22:04:38,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:38,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:38,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:38,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:38,262 INFO L87 Difference]: Start difference. First operand 891 states and 3075 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:38,518 INFO L93 Difference]: Finished difference Result 1032 states and 3433 transitions. [2021-03-10 22:04:38,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:38,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:38,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:38,519 INFO L225 Difference]: With dead ends: 1032 [2021-03-10 22:04:38,519 INFO L226 Difference]: Without dead ends: 1032 [2021-03-10 22:04:38,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-03-10 22:04:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 888. [2021-03-10 22:04:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4577226606538893) internal successors, (3067), 887 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3067 transitions. [2021-03-10 22:04:38,532 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3067 transitions. Word has length 20 [2021-03-10 22:04:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:38,532 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3067 transitions. [2021-03-10 22:04:38,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3067 transitions. [2021-03-10 22:04:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:38,533 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:38,533 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:38,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-03-10 22:04:38,733 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:38,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:38,734 INFO L82 PathProgramCache]: Analyzing trace with hash -428564940, now seen corresponding path program 188 times [2021-03-10 22:04:38,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:38,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659917820] [2021-03-10 22:04:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:38,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659917820] [2021-03-10 22:04:38,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235593287] [2021-03-10 22:04:38,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:38,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:38,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:38,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:38,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:38,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:38,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:38,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848570040] [2021-03-10 22:04:38,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:38,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:38,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:38,948 INFO L87 Difference]: Start difference. First operand 888 states and 3067 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:39,228 INFO L93 Difference]: Finished difference Result 1037 states and 3429 transitions. [2021-03-10 22:04:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:39,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:39,230 INFO L225 Difference]: With dead ends: 1037 [2021-03-10 22:04:39,230 INFO L226 Difference]: Without dead ends: 1037 [2021-03-10 22:04:39,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:39,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-03-10 22:04:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 888. [2021-03-10 22:04:39,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4577226606538893) internal successors, (3067), 887 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3067 transitions. [2021-03-10 22:04:39,240 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3067 transitions. Word has length 20 [2021-03-10 22:04:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:39,240 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3067 transitions. [2021-03-10 22:04:39,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3067 transitions. [2021-03-10 22:04:39,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:39,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:39,241 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:39,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:39,442 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:39,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:39,442 INFO L82 PathProgramCache]: Analyzing trace with hash 931551800, now seen corresponding path program 189 times [2021-03-10 22:04:39,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:39,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367015848] [2021-03-10 22:04:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:39,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367015848] [2021-03-10 22:04:39,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093247431] [2021-03-10 22:04:39,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:39,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:39,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:39,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:39,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:39,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:39,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149875771] [2021-03-10 22:04:39,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:39,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:39,640 INFO L87 Difference]: Start difference. First operand 888 states and 3067 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:39,954 INFO L93 Difference]: Finished difference Result 1079 states and 3535 transitions. [2021-03-10 22:04:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:39,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:39,956 INFO L225 Difference]: With dead ends: 1079 [2021-03-10 22:04:39,956 INFO L226 Difference]: Without dead ends: 1079 [2021-03-10 22:04:39,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-03-10 22:04:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 897. [2021-03-10 22:04:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.463169642857143) internal successors, (3103), 896 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3103 transitions. [2021-03-10 22:04:39,966 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3103 transitions. Word has length 20 [2021-03-10 22:04:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:39,966 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3103 transitions. [2021-03-10 22:04:39,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3103 transitions. [2021-03-10 22:04:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:39,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:39,967 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:40,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:40,168 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1384617084, now seen corresponding path program 190 times [2021-03-10 22:04:40,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:40,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156775325] [2021-03-10 22:04:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:40,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156775325] [2021-03-10 22:04:40,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145684285] [2021-03-10 22:04:40,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:40,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:40,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:40,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:40,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:40,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:40,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:40,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285845830] [2021-03-10 22:04:40,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:40,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:40,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:40,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:40,367 INFO L87 Difference]: Start difference. First operand 897 states and 3103 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:40,623 INFO L93 Difference]: Finished difference Result 1007 states and 3369 transitions. [2021-03-10 22:04:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:40,623 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:40,624 INFO L225 Difference]: With dead ends: 1007 [2021-03-10 22:04:40,624 INFO L226 Difference]: Without dead ends: 995 [2021-03-10 22:04:40,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-03-10 22:04:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 897. [2021-03-10 22:04:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4598214285714284) internal successors, (3100), 896 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3100 transitions. [2021-03-10 22:04:40,633 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3100 transitions. Word has length 20 [2021-03-10 22:04:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:40,633 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3100 transitions. [2021-03-10 22:04:40,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:40,633 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3100 transitions. [2021-03-10 22:04:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:40,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:40,634 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:40,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3249 [2021-03-10 22:04:40,835 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1214618960, now seen corresponding path program 191 times [2021-03-10 22:04:40,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:40,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813508305] [2021-03-10 22:04:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:40,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813508305] [2021-03-10 22:04:40,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857841886] [2021-03-10 22:04:40,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:40,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:40,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:41,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:41,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:41,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281819421] [2021-03-10 22:04:41,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:41,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:41,032 INFO L87 Difference]: Start difference. First operand 897 states and 3100 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:41,282 INFO L93 Difference]: Finished difference Result 1016 states and 3393 transitions. [2021-03-10 22:04:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:41,284 INFO L225 Difference]: With dead ends: 1016 [2021-03-10 22:04:41,284 INFO L226 Difference]: Without dead ends: 1016 [2021-03-10 22:04:41,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-03-10 22:04:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 891. [2021-03-10 22:04:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.455056179775281) internal successors, (3075), 890 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3075 transitions. [2021-03-10 22:04:41,293 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3075 transitions. Word has length 20 [2021-03-10 22:04:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:41,293 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 3075 transitions. [2021-03-10 22:04:41,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3075 transitions. [2021-03-10 22:04:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:41,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:41,294 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:41,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3254 [2021-03-10 22:04:41,495 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:41,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1757262360, now seen corresponding path program 192 times [2021-03-10 22:04:41,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:41,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423661155] [2021-03-10 22:04:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:41,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423661155] [2021-03-10 22:04:41,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917915501] [2021-03-10 22:04:41,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:41,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:41,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:41,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:41,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:41,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:41,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:41,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591345456] [2021-03-10 22:04:41,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:41,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:41,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:41,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:41,746 INFO L87 Difference]: Start difference. First operand 891 states and 3075 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:42,121 INFO L93 Difference]: Finished difference Result 1131 states and 3690 transitions. [2021-03-10 22:04:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:42,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:42,122 INFO L225 Difference]: With dead ends: 1131 [2021-03-10 22:04:42,123 INFO L226 Difference]: Without dead ends: 1131 [2021-03-10 22:04:42,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-03-10 22:04:42,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 897. [2021-03-10 22:04:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4564732142857144) internal successors, (3097), 896 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3097 transitions. [2021-03-10 22:04:42,132 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3097 transitions. Word has length 20 [2021-03-10 22:04:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:42,133 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3097 transitions. [2021-03-10 22:04:42,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3097 transitions. [2021-03-10 22:04:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:42,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:42,134 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:42,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3257,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:42,334 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1581652792, now seen corresponding path program 193 times [2021-03-10 22:04:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:42,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309619076] [2021-03-10 22:04:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:42,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309619076] [2021-03-10 22:04:42,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820964184] [2021-03-10 22:04:42,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:42,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:42,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:42,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:42,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:42,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936093977] [2021-03-10 22:04:42,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:42,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:42,564 INFO L87 Difference]: Start difference. First operand 897 states and 3097 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:42,908 INFO L93 Difference]: Finished difference Result 1101 states and 3618 transitions. [2021-03-10 22:04:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:42,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:42,910 INFO L225 Difference]: With dead ends: 1101 [2021-03-10 22:04:42,910 INFO L226 Difference]: Without dead ends: 1089 [2021-03-10 22:04:42,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-03-10 22:04:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 894. [2021-03-10 22:04:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.455767077267637) internal successors, (3086), 893 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3086 transitions. [2021-03-10 22:04:42,921 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3086 transitions. Word has length 20 [2021-03-10 22:04:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:42,921 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 3086 transitions. [2021-03-10 22:04:42,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3086 transitions. [2021-03-10 22:04:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:42,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:42,922 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:43,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3262 [2021-03-10 22:04:43,122 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2125569182, now seen corresponding path program 194 times [2021-03-10 22:04:43,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:43,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322854702] [2021-03-10 22:04:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:43,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322854702] [2021-03-10 22:04:43,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619250467] [2021-03-10 22:04:43,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:43,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:43,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:43,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:43,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:43,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:43,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53633838] [2021-03-10 22:04:43,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:43,312 INFO L87 Difference]: Start difference. First operand 894 states and 3086 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:43,627 INFO L93 Difference]: Finished difference Result 1092 states and 3594 transitions. [2021-03-10 22:04:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:43,629 INFO L225 Difference]: With dead ends: 1092 [2021-03-10 22:04:43,629 INFO L226 Difference]: Without dead ends: 1074 [2021-03-10 22:04:43,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-03-10 22:04:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 894. [2021-03-10 22:04:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.452407614781635) internal successors, (3083), 893 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3083 transitions. [2021-03-10 22:04:43,639 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3083 transitions. Word has length 20 [2021-03-10 22:04:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:43,639 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 3083 transitions. [2021-03-10 22:04:43,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3083 transitions. [2021-03-10 22:04:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:43,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:43,640 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:43,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:43,843 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1803358238, now seen corresponding path program 195 times [2021-03-10 22:04:43,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:43,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907565293] [2021-03-10 22:04:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:43,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907565293] [2021-03-10 22:04:43,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125598451] [2021-03-10 22:04:43,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:43,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:43,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:44,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:44,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:44,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076419611] [2021-03-10 22:04:44,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:44,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:44,043 INFO L87 Difference]: Start difference. First operand 894 states and 3083 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:44,403 INFO L93 Difference]: Finished difference Result 1284 states and 4122 transitions. [2021-03-10 22:04:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:44,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:44,405 INFO L225 Difference]: With dead ends: 1284 [2021-03-10 22:04:44,405 INFO L226 Difference]: Without dead ends: 1284 [2021-03-10 22:04:44,405 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-03-10 22:04:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 894. [2021-03-10 22:04:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.452407614781635) internal successors, (3083), 893 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3083 transitions. [2021-03-10 22:04:44,416 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3083 transitions. Word has length 20 [2021-03-10 22:04:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:44,416 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 3083 transitions. [2021-03-10 22:04:44,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:44,416 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3083 transitions. [2021-03-10 22:04:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:44,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:44,417 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:44,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3270 [2021-03-10 22:04:44,618 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:44,618 INFO L82 PathProgramCache]: Analyzing trace with hash -245147176, now seen corresponding path program 196 times [2021-03-10 22:04:44,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:44,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946890716] [2021-03-10 22:04:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:44,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946890716] [2021-03-10 22:04:44,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757006528] [2021-03-10 22:04:44,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:44,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:44,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:44,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:44,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:44,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:44,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:44,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712015396] [2021-03-10 22:04:44,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:44,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:44,858 INFO L87 Difference]: Start difference. First operand 894 states and 3083 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:45,530 INFO L93 Difference]: Finished difference Result 1337 states and 4255 transitions. [2021-03-10 22:04:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:04:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:45,532 INFO L225 Difference]: With dead ends: 1337 [2021-03-10 22:04:45,532 INFO L226 Difference]: Without dead ends: 1337 [2021-03-10 22:04:45,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 627.9ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:04:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-03-10 22:04:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 897. [2021-03-10 22:04:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4497767857142856) internal successors, (3091), 896 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3091 transitions. [2021-03-10 22:04:45,543 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3091 transitions. Word has length 20 [2021-03-10 22:04:45,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:45,543 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3091 transitions. [2021-03-10 22:04:45,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3091 transitions. [2021-03-10 22:04:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:45,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:45,545 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:45,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3273 [2021-03-10 22:04:45,747 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:45,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:45,747 INFO L82 PathProgramCache]: Analyzing trace with hash 463211042, now seen corresponding path program 197 times [2021-03-10 22:04:45,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:45,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636566746] [2021-03-10 22:04:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:45,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636566746] [2021-03-10 22:04:45,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405222302] [2021-03-10 22:04:45,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:45,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:45,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:45,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:45,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:45,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:45,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:45,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476732369] [2021-03-10 22:04:45,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:45,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:45,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:45,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:45,959 INFO L87 Difference]: Start difference. First operand 897 states and 3091 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:46,718 INFO L93 Difference]: Finished difference Result 1393 states and 4403 transitions. [2021-03-10 22:04:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:04:46,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:46,721 INFO L225 Difference]: With dead ends: 1393 [2021-03-10 22:04:46,721 INFO L226 Difference]: Without dead ends: 1393 [2021-03-10 22:04:46,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:04:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-03-10 22:04:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 897. [2021-03-10 22:04:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4497767857142856) internal successors, (3091), 896 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3091 transitions. [2021-03-10 22:04:46,732 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3091 transitions. Word has length 20 [2021-03-10 22:04:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:46,732 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3091 transitions. [2021-03-10 22:04:46,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,733 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3091 transitions. [2021-03-10 22:04:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:46,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:46,733 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:46,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-03-10 22:04:46,934 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:46,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1823327782, now seen corresponding path program 198 times [2021-03-10 22:04:46,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:46,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482613023] [2021-03-10 22:04:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:46,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482613023] [2021-03-10 22:04:46,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829434688] [2021-03-10 22:04:46,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:47,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:47,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:47,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:47,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:47,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:47,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302438371] [2021-03-10 22:04:47,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:47,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:47,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:47,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:47,190 INFO L87 Difference]: Start difference. First operand 897 states and 3091 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:47,567 INFO L93 Difference]: Finished difference Result 1136 states and 3752 transitions. [2021-03-10 22:04:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:47,570 INFO L225 Difference]: With dead ends: 1136 [2021-03-10 22:04:47,570 INFO L226 Difference]: Without dead ends: 1136 [2021-03-10 22:04:47,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-03-10 22:04:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 889. [2021-03-10 22:04:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4572072072072073) internal successors, (3070), 888 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3070 transitions. [2021-03-10 22:04:47,580 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3070 transitions. Word has length 20 [2021-03-10 22:04:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:47,580 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 3070 transitions. [2021-03-10 22:04:47,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3070 transitions. [2021-03-10 22:04:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:47,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:47,581 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:47,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3281,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:47,782 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:47,782 INFO L82 PathProgramCache]: Analyzing trace with hash -688046316, now seen corresponding path program 199 times [2021-03-10 22:04:47,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:47,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504722524] [2021-03-10 22:04:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504722524] [2021-03-10 22:04:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058453447] [2021-03-10 22:04:47,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:47,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:48,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:48,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57997526] [2021-03-10 22:04:48,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:48,039 INFO L87 Difference]: Start difference. First operand 889 states and 3070 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:48,470 INFO L93 Difference]: Finished difference Result 1146 states and 3749 transitions. [2021-03-10 22:04:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:48,472 INFO L225 Difference]: With dead ends: 1146 [2021-03-10 22:04:48,472 INFO L226 Difference]: Without dead ends: 1146 [2021-03-10 22:04:48,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 449.0ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:04:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-03-10 22:04:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 895. [2021-03-10 22:04:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.451901565995526) internal successors, (3086), 894 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3086 transitions. [2021-03-10 22:04:48,482 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3086 transitions. Word has length 20 [2021-03-10 22:04:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:48,482 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3086 transitions. [2021-03-10 22:04:48,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3086 transitions. [2021-03-10 22:04:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:48,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:48,483 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:48,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-03-10 22:04:48,684 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:48,684 INFO L82 PathProgramCache]: Analyzing trace with hash 20311902, now seen corresponding path program 200 times [2021-03-10 22:04:48,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:48,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648322439] [2021-03-10 22:04:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:48,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648322439] [2021-03-10 22:04:48,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572996790] [2021-03-10 22:04:48,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:48,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:48,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:48,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:48,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:48,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:48,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:48,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840959877] [2021-03-10 22:04:48,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:48,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:48,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:48,909 INFO L87 Difference]: Start difference. First operand 895 states and 3086 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:49,357 INFO L93 Difference]: Finished difference Result 1184 states and 3861 transitions. [2021-03-10 22:04:49,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:04:49,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:49,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:49,359 INFO L225 Difference]: With dead ends: 1184 [2021-03-10 22:04:49,359 INFO L226 Difference]: Without dead ends: 1184 [2021-03-10 22:04:49,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:04:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-03-10 22:04:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 892. [2021-03-10 22:04:49,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4545454545454546) internal successors, (3078), 891 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3078 transitions. [2021-03-10 22:04:49,369 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3078 transitions. Word has length 20 [2021-03-10 22:04:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:49,370 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3078 transitions. [2021-03-10 22:04:49,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,370 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3078 transitions. [2021-03-10 22:04:49,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:49,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:49,371 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:49,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3290 [2021-03-10 22:04:49,571 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1519520138, now seen corresponding path program 201 times [2021-03-10 22:04:49,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:49,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970782603] [2021-03-10 22:04:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:49,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970782603] [2021-03-10 22:04:49,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859168467] [2021-03-10 22:04:49,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:49,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:49,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:49,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:49,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:49,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:49,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:49,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524263923] [2021-03-10 22:04:49,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:49,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:49,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:49,803 INFO L87 Difference]: Start difference. First operand 892 states and 3078 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:50,170 INFO L93 Difference]: Finished difference Result 1174 states and 3805 transitions. [2021-03-10 22:04:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:50,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:50,172 INFO L225 Difference]: With dead ends: 1174 [2021-03-10 22:04:50,172 INFO L226 Difference]: Without dead ends: 1174 [2021-03-10 22:04:50,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-03-10 22:04:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 892. [2021-03-10 22:04:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4545454545454546) internal successors, (3078), 891 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3078 transitions. [2021-03-10 22:04:50,182 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3078 transitions. Word has length 20 [2021-03-10 22:04:50,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:50,182 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3078 transitions. [2021-03-10 22:04:50,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3078 transitions. [2021-03-10 22:04:50,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:50,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:50,183 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:50,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-03-10 22:04:50,384 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:50,384 INFO L82 PathProgramCache]: Analyzing trace with hash -726355478, now seen corresponding path program 202 times [2021-03-10 22:04:50,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:50,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118562721] [2021-03-10 22:04:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:50,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118562721] [2021-03-10 22:04:50,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373407235] [2021-03-10 22:04:50,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:50,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:50,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:50,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:50,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:50,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:50,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28956003] [2021-03-10 22:04:50,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:50,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:50,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:50,648 INFO L87 Difference]: Start difference. First operand 892 states and 3078 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:51,075 INFO L93 Difference]: Finished difference Result 1130 states and 3703 transitions. [2021-03-10 22:04:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:51,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:51,077 INFO L225 Difference]: With dead ends: 1130 [2021-03-10 22:04:51,077 INFO L226 Difference]: Without dead ends: 1130 [2021-03-10 22:04:51,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:04:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-03-10 22:04:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 901. [2021-03-10 22:04:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.46) internal successors, (3114), 900 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3114 transitions. [2021-03-10 22:04:51,088 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3114 transitions. Word has length 20 [2021-03-10 22:04:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:51,088 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3114 transitions. [2021-03-10 22:04:51,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3114 transitions. [2021-03-10 22:04:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:51,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:51,089 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:51,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3303 [2021-03-10 22:04:51,289 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1252442934, now seen corresponding path program 203 times [2021-03-10 22:04:51,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:51,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826593716] [2021-03-10 22:04:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:51,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826593716] [2021-03-10 22:04:51,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549761139] [2021-03-10 22:04:51,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:51,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:51,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:51,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:51,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:51,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:51,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057594627] [2021-03-10 22:04:51,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:51,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:51,511 INFO L87 Difference]: Start difference. First operand 901 states and 3114 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:51,843 INFO L93 Difference]: Finished difference Result 1136 states and 3725 transitions. [2021-03-10 22:04:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:51,845 INFO L225 Difference]: With dead ends: 1136 [2021-03-10 22:04:51,845 INFO L226 Difference]: Without dead ends: 1124 [2021-03-10 22:04:51,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-03-10 22:04:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 901. [2021-03-10 22:04:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4566666666666666) internal successors, (3111), 900 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3111 transitions. [2021-03-10 22:04:51,861 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3111 transitions. Word has length 20 [2021-03-10 22:04:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:51,861 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3111 transitions. [2021-03-10 22:04:51,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3111 transitions. [2021-03-10 22:04:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:51,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:51,862 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:52,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-03-10 22:04:52,063 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:52,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:52,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1422441058, now seen corresponding path program 204 times [2021-03-10 22:04:52,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:52,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376534881] [2021-03-10 22:04:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:52,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376534881] [2021-03-10 22:04:52,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109525806] [2021-03-10 22:04:52,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:52,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:52,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:52,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:52,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:52,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:52,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521660406] [2021-03-10 22:04:52,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:52,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:52,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:52,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:52,279 INFO L87 Difference]: Start difference. First operand 901 states and 3111 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:52,541 INFO L93 Difference]: Finished difference Result 1067 states and 3561 transitions. [2021-03-10 22:04:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:52,543 INFO L225 Difference]: With dead ends: 1067 [2021-03-10 22:04:52,543 INFO L226 Difference]: Without dead ends: 1067 [2021-03-10 22:04:52,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-03-10 22:04:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 889. [2021-03-10 22:04:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4572072072072073) internal successors, (3070), 888 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3070 transitions. [2021-03-10 22:04:52,552 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3070 transitions. Word has length 20 [2021-03-10 22:04:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:52,552 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 3070 transitions. [2021-03-10 22:04:52,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3070 transitions. [2021-03-10 22:04:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:52,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:52,553 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:52,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:52,754 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:52,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:52,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2092510764, now seen corresponding path program 205 times [2021-03-10 22:04:52,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:52,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126655589] [2021-03-10 22:04:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:52,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126655589] [2021-03-10 22:04:52,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216536867] [2021-03-10 22:04:52,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:52,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:52,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:52,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:52,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:52,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48383356] [2021-03-10 22:04:52,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:52,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:52,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:52,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:52,965 INFO L87 Difference]: Start difference. First operand 889 states and 3070 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:53,374 INFO L93 Difference]: Finished difference Result 1441 states and 4585 transitions. [2021-03-10 22:04:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:53,376 INFO L225 Difference]: With dead ends: 1441 [2021-03-10 22:04:53,376 INFO L226 Difference]: Without dead ends: 1441 [2021-03-10 22:04:53,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-03-10 22:04:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 896. [2021-03-10 22:04:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.4614525139664805) internal successors, (3098), 895 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3098 transitions. [2021-03-10 22:04:53,387 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3098 transitions. Word has length 20 [2021-03-10 22:04:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:53,387 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 3098 transitions. [2021-03-10 22:04:53,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3098 transitions. [2021-03-10 22:04:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:53,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:53,388 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:53,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3314,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:53,589 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:53,589 INFO L82 PathProgramCache]: Analyzing trace with hash -644245470, now seen corresponding path program 206 times [2021-03-10 22:04:53,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:53,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589198035] [2021-03-10 22:04:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:53,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589198035] [2021-03-10 22:04:53,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036175181] [2021-03-10 22:04:53,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:53,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:53,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:53,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:53,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:53,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129670338] [2021-03-10 22:04:53,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:53,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:53,845 INFO L87 Difference]: Start difference. First operand 896 states and 3098 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:54,629 INFO L93 Difference]: Finished difference Result 1487 states and 4696 transitions. [2021-03-10 22:04:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:04:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:54,631 INFO L225 Difference]: With dead ends: 1487 [2021-03-10 22:04:54,631 INFO L226 Difference]: Without dead ends: 1487 [2021-03-10 22:04:54,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 719.5ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:04:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-03-10 22:04:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 902. [2021-03-10 22:04:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4594894561598224) internal successors, (3117), 901 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3117 transitions. [2021-03-10 22:04:54,643 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3117 transitions. Word has length 20 [2021-03-10 22:04:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:54,643 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3117 transitions. [2021-03-10 22:04:54,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3117 transitions. [2021-03-10 22:04:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:54,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:54,644 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:54,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-03-10 22:04:54,844 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:54,844 INFO L82 PathProgramCache]: Analyzing trace with hash 631064828, now seen corresponding path program 207 times [2021-03-10 22:04:54,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:54,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655000714] [2021-03-10 22:04:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:54,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655000714] [2021-03-10 22:04:54,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754223623] [2021-03-10 22:04:54,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:54,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:54,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:54,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:54,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:55,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:55,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:55,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622875893] [2021-03-10 22:04:55,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:55,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:55,082 INFO L87 Difference]: Start difference. First operand 902 states and 3117 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:56,111 INFO L93 Difference]: Finished difference Result 1602 states and 4981 transitions. [2021-03-10 22:04:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:04:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:56,113 INFO L225 Difference]: With dead ends: 1602 [2021-03-10 22:04:56,113 INFO L226 Difference]: Without dead ends: 1602 [2021-03-10 22:04:56,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 925.9ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:04:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-03-10 22:04:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 905. [2021-03-10 22:04:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 3.463495575221239) internal successors, (3131), 904 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 3131 transitions. [2021-03-10 22:04:56,125 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 3131 transitions. Word has length 20 [2021-03-10 22:04:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:56,126 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 3131 transitions. [2021-03-10 22:04:56,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 3131 transitions. [2021-03-10 22:04:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:56,127 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:56,127 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:56,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:56,341 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:56,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1424229488, now seen corresponding path program 208 times [2021-03-10 22:04:56,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:56,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622280076] [2021-03-10 22:04:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:56,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622280076] [2021-03-10 22:04:56,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045474390] [2021-03-10 22:04:56,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:56,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:56,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:56,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:56,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:56,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:56,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:56,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021837349] [2021-03-10 22:04:56,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:56,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:56,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:56,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:56,653 INFO L87 Difference]: Start difference. First operand 905 states and 3131 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:57,223 INFO L93 Difference]: Finished difference Result 1295 states and 4206 transitions. [2021-03-10 22:04:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:57,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:57,225 INFO L225 Difference]: With dead ends: 1295 [2021-03-10 22:04:57,225 INFO L226 Difference]: Without dead ends: 1295 [2021-03-10 22:04:57,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-03-10 22:04:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 897. [2021-03-10 22:04:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.470982142857143) internal successors, (3110), 896 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3110 transitions. [2021-03-10 22:04:57,236 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3110 transitions. Word has length 20 [2021-03-10 22:04:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:57,236 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3110 transitions. [2021-03-10 22:04:57,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3110 transitions. [2021-03-10 22:04:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:57,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:57,237 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:57,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3330 [2021-03-10 22:04:57,437 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1979263942, now seen corresponding path program 209 times [2021-03-10 22:04:57,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:57,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194335536] [2021-03-10 22:04:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:57,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194335536] [2021-03-10 22:04:57,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531240377] [2021-03-10 22:04:57,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:57,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:57,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:57,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:57,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:57,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:57,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:57,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892698548] [2021-03-10 22:04:57,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:57,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:57,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:57,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:57,735 INFO L87 Difference]: Start difference. First operand 897 states and 3110 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:58,071 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 22:04:58,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:58,321 INFO L93 Difference]: Finished difference Result 1212 states and 3973 transitions. [2021-03-10 22:04:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:58,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:58,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:58,323 INFO L225 Difference]: With dead ends: 1212 [2021-03-10 22:04:58,323 INFO L226 Difference]: Without dead ends: 1187 [2021-03-10 22:04:58,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-03-10 22:04:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 901. [2021-03-10 22:04:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.466666666666667) internal successors, (3120), 900 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3120 transitions. [2021-03-10 22:04:58,333 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3120 transitions. Word has length 20 [2021-03-10 22:04:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:58,333 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3120 transitions. [2021-03-10 22:04:58,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3120 transitions. [2021-03-10 22:04:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:58,334 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:58,334 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:58,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3341,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:58,535 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:58,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:58,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1661141342, now seen corresponding path program 210 times [2021-03-10 22:04:58,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:58,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955662247] [2021-03-10 22:04:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:58,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955662247] [2021-03-10 22:04:58,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383031359] [2021-03-10 22:04:58,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:58,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:58,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:58,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:58,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:58,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457517366] [2021-03-10 22:04:58,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:58,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:58,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:58,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:58,771 INFO L87 Difference]: Start difference. First operand 901 states and 3120 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:59,181 INFO L93 Difference]: Finished difference Result 1360 states and 4399 transitions. [2021-03-10 22:04:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:59,183 INFO L225 Difference]: With dead ends: 1360 [2021-03-10 22:04:59,183 INFO L226 Difference]: Without dead ends: 1360 [2021-03-10 22:04:59,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-03-10 22:04:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 894. [2021-03-10 22:04:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.461366181410974) internal successors, (3091), 893 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3091 transitions. [2021-03-10 22:04:59,194 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3091 transitions. Word has length 20 [2021-03-10 22:04:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:59,194 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 3091 transitions. [2021-03-10 22:04:59,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3091 transitions. [2021-03-10 22:04:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:59,195 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:59,195 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:59,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3351 [2021-03-10 22:04:59,395 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1718811554, now seen corresponding path program 211 times [2021-03-10 22:04:59,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:59,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239368384] [2021-03-10 22:04:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:59,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239368384] [2021-03-10 22:04:59,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166822337] [2021-03-10 22:04:59,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:59,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:59,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:59,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:59,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681891017] [2021-03-10 22:04:59,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:59,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:59,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:59,656 INFO L87 Difference]: Start difference. First operand 894 states and 3091 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:00,282 INFO L93 Difference]: Finished difference Result 1287 states and 4215 transitions. [2021-03-10 22:05:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:00,284 INFO L225 Difference]: With dead ends: 1287 [2021-03-10 22:05:00,284 INFO L226 Difference]: Without dead ends: 1287 [2021-03-10 22:05:00,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 573.0ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-03-10 22:05:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 897. [2021-03-10 22:05:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.466517857142857) internal successors, (3106), 896 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3106 transitions. [2021-03-10 22:05:00,295 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3106 transitions. Word has length 20 [2021-03-10 22:05:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:00,295 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3106 transitions. [2021-03-10 22:05:00,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3106 transitions. [2021-03-10 22:05:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:00,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:00,296 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:00,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3356,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:00,496 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash 951965406, now seen corresponding path program 212 times [2021-03-10 22:05:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:00,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912631748] [2021-03-10 22:05:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:00,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912631748] [2021-03-10 22:05:00,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197926504] [2021-03-10 22:05:00,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:00,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:00,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:00,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:00,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:00,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:00,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:00,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099603188] [2021-03-10 22:05:00,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:00,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:00,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:00,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:00,746 INFO L87 Difference]: Start difference. First operand 897 states and 3106 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:01,182 INFO L93 Difference]: Finished difference Result 1313 states and 4281 transitions. [2021-03-10 22:05:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:01,184 INFO L225 Difference]: With dead ends: 1313 [2021-03-10 22:05:01,184 INFO L226 Difference]: Without dead ends: 1313 [2021-03-10 22:05:01,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:05:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-03-10 22:05:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 898. [2021-03-10 22:05:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.469342251950948) internal successors, (3112), 897 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3112 transitions. [2021-03-10 22:05:01,195 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3112 transitions. Word has length 20 [2021-03-10 22:05:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:01,195 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3112 transitions. [2021-03-10 22:05:01,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3112 transitions. [2021-03-10 22:05:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:01,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:01,196 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:01,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-03-10 22:05:01,397 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:01,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1005171550, now seen corresponding path program 213 times [2021-03-10 22:05:01,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:01,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6914077] [2021-03-10 22:05:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:01,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6914077] [2021-03-10 22:05:01,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582989495] [2021-03-10 22:05:01,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:01,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:01,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:01,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:01,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:01,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:01,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:01,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784726499] [2021-03-10 22:05:01,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:01,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:01,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:01,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:01,682 INFO L87 Difference]: Start difference. First operand 898 states and 3112 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:02,126 INFO L93 Difference]: Finished difference Result 1280 states and 4204 transitions. [2021-03-10 22:05:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:02,128 INFO L225 Difference]: With dead ends: 1280 [2021-03-10 22:05:02,128 INFO L226 Difference]: Without dead ends: 1280 [2021-03-10 22:05:02,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-03-10 22:05:02,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 895. [2021-03-10 22:05:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4642058165548097) internal successors, (3097), 894 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3097 transitions. [2021-03-10 22:05:02,139 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3097 transitions. Word has length 20 [2021-03-10 22:05:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:02,139 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3097 transitions. [2021-03-10 22:05:02,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3097 transitions. [2021-03-10 22:05:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:02,140 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:02,140 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:02,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3368,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:02,355 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:02,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1815112108, now seen corresponding path program 214 times [2021-03-10 22:05:02,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:02,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821428512] [2021-03-10 22:05:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:02,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821428512] [2021-03-10 22:05:02,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909120514] [2021-03-10 22:05:02,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:02,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:02,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:02,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:02,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:02,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:02,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:02,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67094780] [2021-03-10 22:05:02,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:02,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:02,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:02,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:02,665 INFO L87 Difference]: Start difference. First operand 895 states and 3097 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:03,413 INFO L93 Difference]: Finished difference Result 1340 states and 4331 transitions. [2021-03-10 22:05:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:03,416 INFO L225 Difference]: With dead ends: 1340 [2021-03-10 22:05:03,416 INFO L226 Difference]: Without dead ends: 1340 [2021-03-10 22:05:03,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-03-10 22:05:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 902. [2021-03-10 22:05:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.46503884572697) internal successors, (3122), 901 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3122 transitions. [2021-03-10 22:05:03,427 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3122 transitions. Word has length 20 [2021-03-10 22:05:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:03,427 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3122 transitions. [2021-03-10 22:05:03,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3122 transitions. [2021-03-10 22:05:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:03,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:03,428 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:03,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3375 [2021-03-10 22:05:03,628 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:03,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:03,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1106753890, now seen corresponding path program 215 times [2021-03-10 22:05:03,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:03,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673201452] [2021-03-10 22:05:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:03,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673201452] [2021-03-10 22:05:03,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567437656] [2021-03-10 22:05:03,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:03,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:03,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:03,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:03,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:03,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:03,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077076317] [2021-03-10 22:05:03,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:03,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:03,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:03,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:03,897 INFO L87 Difference]: Start difference. First operand 902 states and 3122 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:04,829 INFO L93 Difference]: Finished difference Result 1465 states and 4637 transitions. [2021-03-10 22:05:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:05:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:04,832 INFO L225 Difference]: With dead ends: 1465 [2021-03-10 22:05:04,832 INFO L226 Difference]: Without dead ends: 1465 [2021-03-10 22:05:04,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 853.1ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:05:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-03-10 22:05:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 902. [2021-03-10 22:05:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4716981132075473) internal successors, (3128), 901 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3128 transitions. [2021-03-10 22:05:04,843 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3128 transitions. Word has length 20 [2021-03-10 22:05:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:04,843 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3128 transitions. [2021-03-10 22:05:04,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3128 transitions. [2021-03-10 22:05:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:04,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:04,844 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:05,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3379,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:05,045 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:05,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1018215370, now seen corresponding path program 216 times [2021-03-10 22:05:05,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:05,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380443279] [2021-03-10 22:05:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:05,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380443279] [2021-03-10 22:05:05,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629210935] [2021-03-10 22:05:05,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:05,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:05,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:05,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:05,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:05,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:05,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:05,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941632186] [2021-03-10 22:05:05,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:05,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:05,361 INFO L87 Difference]: Start difference. First operand 902 states and 3128 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:06,230 INFO L93 Difference]: Finished difference Result 1231 states and 4033 transitions. [2021-03-10 22:05:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:06,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:06,232 INFO L225 Difference]: With dead ends: 1231 [2021-03-10 22:05:06,232 INFO L226 Difference]: Without dead ends: 1217 [2021-03-10 22:05:06,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 855.0ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-03-10 22:05:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 902. [2021-03-10 22:05:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4716981132075473) internal successors, (3128), 901 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3128 transitions. [2021-03-10 22:05:06,242 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3128 transitions. Word has length 20 [2021-03-10 22:05:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:06,242 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3128 transitions. [2021-03-10 22:05:06,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3128 transitions. [2021-03-10 22:05:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:06,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:06,243 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:06,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3385 [2021-03-10 22:05:06,443 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash 3464990, now seen corresponding path program 217 times [2021-03-10 22:05:06,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:06,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126661407] [2021-03-10 22:05:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:06,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126661407] [2021-03-10 22:05:06,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107237412] [2021-03-10 22:05:06,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:06,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:06,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:06,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842358743] [2021-03-10 22:05:06,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:06,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:06,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:06,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:06,717 INFO L87 Difference]: Start difference. First operand 902 states and 3128 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:07,482 INFO L93 Difference]: Finished difference Result 1262 states and 4145 transitions. [2021-03-10 22:05:07,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:07,483 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:07,484 INFO L225 Difference]: With dead ends: 1262 [2021-03-10 22:05:07,484 INFO L226 Difference]: Without dead ends: 1262 [2021-03-10 22:05:07,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:05:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-03-10 22:05:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 898. [2021-03-10 22:05:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.469342251950948) internal successors, (3112), 897 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3112 transitions. [2021-03-10 22:05:07,495 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3112 transitions. Word has length 20 [2021-03-10 22:05:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:07,495 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3112 transitions. [2021-03-10 22:05:07,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3112 transitions. [2021-03-10 22:05:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:07,496 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:07,496 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:07,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3395,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:07,696 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:07,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231070, now seen corresponding path program 218 times [2021-03-10 22:05:07,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:07,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287898289] [2021-03-10 22:05:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:07,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287898289] [2021-03-10 22:05:07,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957284596] [2021-03-10 22:05:07,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:07,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:07,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:07,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:07,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:07,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:07,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173231766] [2021-03-10 22:05:07,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:07,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:07,981 INFO L87 Difference]: Start difference. First operand 898 states and 3112 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:08,607 INFO L93 Difference]: Finished difference Result 1287 states and 4215 transitions. [2021-03-10 22:05:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:08,609 INFO L225 Difference]: With dead ends: 1287 [2021-03-10 22:05:08,609 INFO L226 Difference]: Without dead ends: 1287 [2021-03-10 22:05:08,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:08,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-03-10 22:05:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 899. [2021-03-10 22:05:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.472160356347439) internal successors, (3118), 898 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3118 transitions. [2021-03-10 22:05:08,619 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3118 transitions. Word has length 20 [2021-03-10 22:05:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:08,619 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3118 transitions. [2021-03-10 22:05:08,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3118 transitions. [2021-03-10 22:05:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:08,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:08,620 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:08,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3400,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:08,821 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash -770905886, now seen corresponding path program 219 times [2021-03-10 22:05:08,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:08,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127065913] [2021-03-10 22:05:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:08,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127065913] [2021-03-10 22:05:08,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713765438] [2021-03-10 22:05:08,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:08,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:08,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:08,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:09,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:09,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:09,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341379041] [2021-03-10 22:05:09,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:09,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:09,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:09,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:09,131 INFO L87 Difference]: Start difference. First operand 899 states and 3118 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:09,717 INFO L93 Difference]: Finished difference Result 1244 states and 4112 transitions. [2021-03-10 22:05:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:09,719 INFO L225 Difference]: With dead ends: 1244 [2021-03-10 22:05:09,719 INFO L226 Difference]: Without dead ends: 1244 [2021-03-10 22:05:09,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:05:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-03-10 22:05:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 895. [2021-03-10 22:05:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4642058165548097) internal successors, (3097), 894 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3097 transitions. [2021-03-10 22:05:09,730 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3097 transitions. Word has length 20 [2021-03-10 22:05:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:09,730 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3097 transitions. [2021-03-10 22:05:09,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3097 transitions. [2021-03-10 22:05:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:09,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:09,731 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:09,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3406,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:09,931 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:09,932 INFO L82 PathProgramCache]: Analyzing trace with hash 324265200, now seen corresponding path program 220 times [2021-03-10 22:05:09,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:09,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293534298] [2021-03-10 22:05:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:10,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293534298] [2021-03-10 22:05:10,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571113722] [2021-03-10 22:05:10,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:10,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:10,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:10,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:10,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:10,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:10,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:10,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480393279] [2021-03-10 22:05:10,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:10,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:10,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:10,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:10,201 INFO L87 Difference]: Start difference. First operand 895 states and 3097 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:11,181 INFO L93 Difference]: Finished difference Result 1481 states and 4638 transitions. [2021-03-10 22:05:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:05:11,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:11,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:11,183 INFO L225 Difference]: With dead ends: 1481 [2021-03-10 22:05:11,183 INFO L226 Difference]: Without dead ends: 1481 [2021-03-10 22:05:11,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 889.5ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:05:11,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-03-10 22:05:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 899. [2021-03-10 22:05:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4710467706013364) internal successors, (3117), 898 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3117 transitions. [2021-03-10 22:05:11,195 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3117 transitions. Word has length 20 [2021-03-10 22:05:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:11,195 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3117 transitions. [2021-03-10 22:05:11,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3117 transitions. [2021-03-10 22:05:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:11,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:11,196 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:11,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3414,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:11,397 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:11,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:11,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1684381940, now seen corresponding path program 221 times [2021-03-10 22:05:11,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:11,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464111531] [2021-03-10 22:05:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464111531] [2021-03-10 22:05:11,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027684442] [2021-03-10 22:05:11,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:11,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:11,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:11,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:11,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:11,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667850093] [2021-03-10 22:05:11,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:11,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:11,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:11,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:11,741 INFO L87 Difference]: Start difference. First operand 899 states and 3117 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:12,693 INFO L93 Difference]: Finished difference Result 1287 states and 4168 transitions. [2021-03-10 22:05:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:12,695 INFO L225 Difference]: With dead ends: 1287 [2021-03-10 22:05:12,695 INFO L226 Difference]: Without dead ends: 1287 [2021-03-10 22:05:12,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 940.2ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-03-10 22:05:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 902. [2021-03-10 22:05:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.475027746947836) internal successors, (3131), 901 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3131 transitions. [2021-03-10 22:05:12,706 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3131 transitions. Word has length 20 [2021-03-10 22:05:12,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:12,706 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3131 transitions. [2021-03-10 22:05:12,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:12,706 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3131 transitions. [2021-03-10 22:05:12,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:12,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:12,707 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:12,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3421,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:12,908 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:12,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:12,908 INFO L82 PathProgramCache]: Analyzing trace with hash 12619042, now seen corresponding path program 222 times [2021-03-10 22:05:12,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:12,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54709586] [2021-03-10 22:05:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:12,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54709586] [2021-03-10 22:05:12,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880410986] [2021-03-10 22:05:12,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:13,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:13,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:13,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:13,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:13,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963848540] [2021-03-10 22:05:13,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:13,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:13,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:13,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:13,238 INFO L87 Difference]: Start difference. First operand 902 states and 3131 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,117 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-10 22:05:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:14,321 INFO L93 Difference]: Finished difference Result 1250 states and 4078 transitions. [2021-03-10 22:05:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:14,323 INFO L225 Difference]: With dead ends: 1250 [2021-03-10 22:05:14,323 INFO L226 Difference]: Without dead ends: 1250 [2021-03-10 22:05:14,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1057.8ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:05:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-03-10 22:05:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 902. [2021-03-10 22:05:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.475027746947836) internal successors, (3131), 901 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3131 transitions. [2021-03-10 22:05:14,334 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3131 transitions. Word has length 20 [2021-03-10 22:05:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:14,334 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3131 transitions. [2021-03-10 22:05:14,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3131 transitions. [2021-03-10 22:05:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:14,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:14,335 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:14,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-03-10 22:05:14,535 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1075665638, now seen corresponding path program 223 times [2021-03-10 22:05:14,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:14,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722309064] [2021-03-10 22:05:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:14,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722309064] [2021-03-10 22:05:14,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417929599] [2021-03-10 22:05:14,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:14,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:14,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:14,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:14,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:14,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706294766] [2021-03-10 22:05:14,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:14,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:14,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:14,826 INFO L87 Difference]: Start difference. First operand 902 states and 3131 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:15,594 INFO L93 Difference]: Finished difference Result 1302 states and 4256 transitions. [2021-03-10 22:05:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:15,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:15,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:15,596 INFO L225 Difference]: With dead ends: 1302 [2021-03-10 22:05:15,596 INFO L226 Difference]: Without dead ends: 1302 [2021-03-10 22:05:15,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:05:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-03-10 22:05:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 899. [2021-03-10 22:05:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4710467706013364) internal successors, (3117), 898 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3117 transitions. [2021-03-10 22:05:15,607 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3117 transitions. Word has length 20 [2021-03-10 22:05:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:15,607 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3117 transitions. [2021-03-10 22:05:15,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3117 transitions. [2021-03-10 22:05:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:15,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:15,608 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:15,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3439 [2021-03-10 22:05:15,808 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:15,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1926959258, now seen corresponding path program 224 times [2021-03-10 22:05:15,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:15,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871234282] [2021-03-10 22:05:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:15,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871234282] [2021-03-10 22:05:15,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155828729] [2021-03-10 22:05:15,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:15,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:15,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:15,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:15,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:16,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:16,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:16,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476633113] [2021-03-10 22:05:16,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:16,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:16,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:16,087 INFO L87 Difference]: Start difference. First operand 899 states and 3117 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:16,855 INFO L93 Difference]: Finished difference Result 1294 states and 4234 transitions. [2021-03-10 22:05:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:16,857 INFO L225 Difference]: With dead ends: 1294 [2021-03-10 22:05:16,857 INFO L226 Difference]: Without dead ends: 1294 [2021-03-10 22:05:16,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 712.4ms TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:05:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-03-10 22:05:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 898. [2021-03-10 22:05:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.468227424749164) internal successors, (3111), 897 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3111 transitions. [2021-03-10 22:05:16,868 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3111 transitions. Word has length 20 [2021-03-10 22:05:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:16,868 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3111 transitions. [2021-03-10 22:05:16,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3111 transitions. [2021-03-10 22:05:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:16,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:16,869 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:17,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3447,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:17,070 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:17,070 INFO L82 PathProgramCache]: Analyzing trace with hash -819021760, now seen corresponding path program 225 times [2021-03-10 22:05:17,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:17,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917647146] [2021-03-10 22:05:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:17,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917647146] [2021-03-10 22:05:17,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318661894] [2021-03-10 22:05:17,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:17,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:17,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:17,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:17,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:17,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:17,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204052884] [2021-03-10 22:05:17,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:17,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:17,358 INFO L87 Difference]: Start difference. First operand 898 states and 3111 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:18,113 INFO L93 Difference]: Finished difference Result 1243 states and 4095 transitions. [2021-03-10 22:05:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:18,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:18,115 INFO L225 Difference]: With dead ends: 1243 [2021-03-10 22:05:18,115 INFO L226 Difference]: Without dead ends: 1243 [2021-03-10 22:05:18,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 710.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:05:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-03-10 22:05:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 896. [2021-03-10 22:05:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.470391061452514) internal successors, (3106), 895 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3106 transitions. [2021-03-10 22:05:18,126 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3106 transitions. Word has length 20 [2021-03-10 22:05:18,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:18,126 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 3106 transitions. [2021-03-10 22:05:18,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3106 transitions. [2021-03-10 22:05:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:18,127 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:18,127 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:18,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3455,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:18,327 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:18,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1591996514, now seen corresponding path program 226 times [2021-03-10 22:05:18,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:18,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141325795] [2021-03-10 22:05:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:18,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141325795] [2021-03-10 22:05:18,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826748588] [2021-03-10 22:05:18,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:18,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:18,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:18,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:18,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:18,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:18,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273076437] [2021-03-10 22:05:18,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:18,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:18,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:18,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:18,639 INFO L87 Difference]: Start difference. First operand 896 states and 3106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:19,374 INFO L93 Difference]: Finished difference Result 1213 states and 3982 transitions. [2021-03-10 22:05:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:19,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:19,376 INFO L225 Difference]: With dead ends: 1213 [2021-03-10 22:05:19,376 INFO L226 Difference]: Without dead ends: 1213 [2021-03-10 22:05:19,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 742.9ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:05:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-03-10 22:05:19,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 893. [2021-03-10 22:05:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4663677130044843) internal successors, (3092), 892 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3092 transitions. [2021-03-10 22:05:19,387 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3092 transitions. Word has length 20 [2021-03-10 22:05:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:19,387 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3092 transitions. [2021-03-10 22:05:19,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3092 transitions. [2021-03-10 22:05:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:19,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:19,388 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:19,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3463 [2021-03-10 22:05:19,589 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1078633014, now seen corresponding path program 227 times [2021-03-10 22:05:19,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:19,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452250033] [2021-03-10 22:05:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:19,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452250033] [2021-03-10 22:05:19,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381078154] [2021-03-10 22:05:19,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:19,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:19,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:19,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:19,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:19,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:19,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:19,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971530966] [2021-03-10 22:05:19,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:19,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:19,967 INFO L87 Difference]: Start difference. First operand 893 states and 3092 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:20,683 INFO L93 Difference]: Finished difference Result 1177 states and 3899 transitions. [2021-03-10 22:05:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:20,685 INFO L225 Difference]: With dead ends: 1177 [2021-03-10 22:05:20,685 INFO L226 Difference]: Without dead ends: 1177 [2021-03-10 22:05:20,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 746.1ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-03-10 22:05:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 892. [2021-03-10 22:05:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.463524130190797) internal successors, (3086), 891 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3086 transitions. [2021-03-10 22:05:20,695 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3086 transitions. Word has length 20 [2021-03-10 22:05:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:20,695 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3086 transitions. [2021-03-10 22:05:20,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3086 transitions. [2021-03-10 22:05:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:20,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:20,696 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:20,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3472,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:20,896 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1669793570, now seen corresponding path program 228 times [2021-03-10 22:05:20,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:20,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567656122] [2021-03-10 22:05:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:20,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567656122] [2021-03-10 22:05:20,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817426899] [2021-03-10 22:05:20,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:21,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:21,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:21,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:21,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:21,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:21,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:21,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095172513] [2021-03-10 22:05:21,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:21,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:21,174 INFO L87 Difference]: Start difference. First operand 892 states and 3086 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:21,747 INFO L93 Difference]: Finished difference Result 1145 states and 3748 transitions. [2021-03-10 22:05:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:21,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:21,749 INFO L225 Difference]: With dead ends: 1145 [2021-03-10 22:05:21,749 INFO L226 Difference]: Without dead ends: 1145 [2021-03-10 22:05:21,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-03-10 22:05:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 898. [2021-03-10 22:05:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4581939799331103) internal successors, (3102), 897 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3102 transitions. [2021-03-10 22:05:21,759 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3102 transitions. Word has length 20 [2021-03-10 22:05:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:21,759 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3102 transitions. [2021-03-10 22:05:21,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3102 transitions. [2021-03-10 22:05:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:21,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:21,760 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:21,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3484 [2021-03-10 22:05:21,961 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:21,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:21,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1916815508, now seen corresponding path program 229 times [2021-03-10 22:05:21,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:21,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357618929] [2021-03-10 22:05:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:22,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357618929] [2021-03-10 22:05:22,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234481461] [2021-03-10 22:05:22,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:22,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:22,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:22,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:22,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:22,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214285294] [2021-03-10 22:05:22,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:22,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:22,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:22,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:22,210 INFO L87 Difference]: Start difference. First operand 898 states and 3102 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:22,869 INFO L93 Difference]: Finished difference Result 1231 states and 3974 transitions. [2021-03-10 22:05:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:05:22,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:22,871 INFO L225 Difference]: With dead ends: 1231 [2021-03-10 22:05:22,871 INFO L226 Difference]: Without dead ends: 1231 [2021-03-10 22:05:22,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 609.5ms TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:05:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-03-10 22:05:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 895. [2021-03-10 22:05:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.460850111856823) internal successors, (3094), 894 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3094 transitions. [2021-03-10 22:05:22,882 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3094 transitions. Word has length 20 [2021-03-10 22:05:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:22,882 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3094 transitions. [2021-03-10 22:05:22,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3094 transitions. [2021-03-10 22:05:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:22,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:22,883 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:23,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3486,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:23,083 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:23,083 INFO L82 PathProgramCache]: Analyzing trace with hash 838319748, now seen corresponding path program 230 times [2021-03-10 22:05:23,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:23,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913589493] [2021-03-10 22:05:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:23,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913589493] [2021-03-10 22:05:23,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954741910] [2021-03-10 22:05:23,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:23,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:23,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:23,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:23,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:23,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:23,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:23,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355838897] [2021-03-10 22:05:23,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:23,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:23,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:23,346 INFO L87 Difference]: Start difference. First operand 895 states and 3094 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:23,838 INFO L93 Difference]: Finished difference Result 1173 states and 3804 transitions. [2021-03-10 22:05:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:23,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:23,840 INFO L225 Difference]: With dead ends: 1173 [2021-03-10 22:05:23,840 INFO L226 Difference]: Without dead ends: 1173 [2021-03-10 22:05:23,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-03-10 22:05:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 895. [2021-03-10 22:05:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.460850111856823) internal successors, (3094), 894 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3094 transitions. [2021-03-10 22:05:23,850 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3094 transitions. Word has length 20 [2021-03-10 22:05:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:23,850 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3094 transitions. [2021-03-10 22:05:23,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3094 transitions. [2021-03-10 22:05:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:23,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:23,851 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:24,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3492 [2021-03-10 22:05:24,051 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1631484408, now seen corresponding path program 231 times [2021-03-10 22:05:24,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:24,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521166859] [2021-03-10 22:05:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521166859] [2021-03-10 22:05:24,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131136540] [2021-03-10 22:05:24,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:24,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:24,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:24,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:24,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:24,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:24,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679165837] [2021-03-10 22:05:24,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:24,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:24,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:24,302 INFO L87 Difference]: Start difference. First operand 895 states and 3094 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:24,821 INFO L93 Difference]: Finished difference Result 1175 states and 3811 transitions. [2021-03-10 22:05:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:05:24,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:24,823 INFO L225 Difference]: With dead ends: 1175 [2021-03-10 22:05:24,823 INFO L226 Difference]: Without dead ends: 1175 [2021-03-10 22:05:24,823 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:05:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-03-10 22:05:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 904. [2021-03-10 22:05:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.4662236987818384) internal successors, (3130), 903 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3130 transitions. [2021-03-10 22:05:24,834 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3130 transitions. Word has length 20 [2021-03-10 22:05:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:24,834 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 3130 transitions. [2021-03-10 22:05:24,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3130 transitions. [2021-03-10 22:05:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:24,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:24,835 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:25,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3497,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:25,035 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:25,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:25,035 INFO L82 PathProgramCache]: Analyzing trace with hash -684684476, now seen corresponding path program 232 times [2021-03-10 22:05:25,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:25,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756753914] [2021-03-10 22:05:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:25,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756753914] [2021-03-10 22:05:25,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567436195] [2021-03-10 22:05:25,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:25,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:25,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:25,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:25,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:25,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:25,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116583113] [2021-03-10 22:05:25,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:25,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:25,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:25,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:25,316 INFO L87 Difference]: Start difference. First operand 904 states and 3130 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:25,736 INFO L93 Difference]: Finished difference Result 1122 states and 3692 transitions. [2021-03-10 22:05:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:25,737 INFO L225 Difference]: With dead ends: 1122 [2021-03-10 22:05:25,738 INFO L226 Difference]: Without dead ends: 1110 [2021-03-10 22:05:25,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-03-10 22:05:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 904. [2021-03-10 22:05:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.4629014396456257) internal successors, (3127), 903 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3127 transitions. [2021-03-10 22:05:25,747 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3127 transitions. Word has length 20 [2021-03-10 22:05:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:25,747 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 3127 transitions. [2021-03-10 22:05:25,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3127 transitions. [2021-03-10 22:05:25,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:25,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:25,748 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:25,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3502 [2021-03-10 22:05:25,949 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash -514686352, now seen corresponding path program 233 times [2021-03-10 22:05:25,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:25,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212949120] [2021-03-10 22:05:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:26,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212949120] [2021-03-10 22:05:26,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338181407] [2021-03-10 22:05:26,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:26,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:26,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:26,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:26,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:26,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984334952] [2021-03-10 22:05:26,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:26,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:26,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:26,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:26,194 INFO L87 Difference]: Start difference. First operand 904 states and 3127 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:26,598 INFO L93 Difference]: Finished difference Result 1065 states and 3558 transitions. [2021-03-10 22:05:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:26,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:26,600 INFO L225 Difference]: With dead ends: 1065 [2021-03-10 22:05:26,600 INFO L226 Difference]: Without dead ends: 1065 [2021-03-10 22:05:26,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:05:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-03-10 22:05:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 892. [2021-03-10 22:05:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.463524130190797) internal successors, (3086), 891 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3086 transitions. [2021-03-10 22:05:26,609 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3086 transitions. Word has length 20 [2021-03-10 22:05:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:26,609 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3086 transitions. [2021-03-10 22:05:26,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3086 transitions. [2021-03-10 22:05:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:26,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:26,610 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:26,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3507,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:26,811 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:26,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:26,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2083858536, now seen corresponding path program 234 times [2021-03-10 22:05:26,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:26,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272965723] [2021-03-10 22:05:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:26,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272965723] [2021-03-10 22:05:26,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059278715] [2021-03-10 22:05:26,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:26,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:26,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:26,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:26,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:27,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:27,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:27,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561188493] [2021-03-10 22:05:27,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:27,094 INFO L87 Difference]: Start difference. First operand 892 states and 3086 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:27,809 INFO L93 Difference]: Finished difference Result 1181 states and 3845 transitions. [2021-03-10 22:05:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:27,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:27,811 INFO L225 Difference]: With dead ends: 1181 [2021-03-10 22:05:27,811 INFO L226 Difference]: Without dead ends: 1181 [2021-03-10 22:05:27,811 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:05:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-03-10 22:05:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 899. [2021-03-10 22:05:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.464365256124722) internal successors, (3111), 898 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3111 transitions. [2021-03-10 22:05:27,821 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3111 transitions. Word has length 20 [2021-03-10 22:05:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:27,821 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3111 transitions. [2021-03-10 22:05:27,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3111 transitions. [2021-03-10 22:05:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:27,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:27,822 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:28,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3509 [2021-03-10 22:05:28,022 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1375500318, now seen corresponding path program 235 times [2021-03-10 22:05:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:28,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671811328] [2021-03-10 22:05:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671811328] [2021-03-10 22:05:28,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634107991] [2021-03-10 22:05:28,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:28,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:28,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:28,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590355371] [2021-03-10 22:05:28,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:28,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:28,285 INFO L87 Difference]: Start difference. First operand 899 states and 3111 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:29,289 INFO L93 Difference]: Finished difference Result 1387 states and 4322 transitions. [2021-03-10 22:05:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:05:29,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:29,291 INFO L225 Difference]: With dead ends: 1387 [2021-03-10 22:05:29,291 INFO L226 Difference]: Without dead ends: 1387 [2021-03-10 22:05:29,291 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 914.3ms TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:05:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-03-10 22:05:29,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 899. [2021-03-10 22:05:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4710467706013364) internal successors, (3117), 898 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3117 transitions. [2021-03-10 22:05:29,302 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3117 transitions. Word has length 20 [2021-03-10 22:05:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:29,302 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3117 transitions. [2021-03-10 22:05:29,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3117 transitions. [2021-03-10 22:05:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:29,303 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:29,304 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:29,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3513 [2021-03-10 22:05:29,504 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash 749468942, now seen corresponding path program 236 times [2021-03-10 22:05:29,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:29,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740776288] [2021-03-10 22:05:29,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:29,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740776288] [2021-03-10 22:05:29,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106888499] [2021-03-10 22:05:29,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:29,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:29,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:29,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:29,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:29,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:29,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:29,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253032401] [2021-03-10 22:05:29,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:29,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:29,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:29,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:29,825 INFO L87 Difference]: Start difference. First operand 899 states and 3117 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:30,171 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:05:30,359 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-03-10 22:05:30,514 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:05:30,770 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-10 22:05:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:30,850 INFO L93 Difference]: Finished difference Result 1109 states and 3658 transitions. [2021-03-10 22:05:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:30,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:30,852 INFO L225 Difference]: With dead ends: 1109 [2021-03-10 22:05:30,853 INFO L226 Difference]: Without dead ends: 1095 [2021-03-10 22:05:30,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1006.2ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-03-10 22:05:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 899. [2021-03-10 22:05:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4688195991091315) internal successors, (3115), 898 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3115 transitions. [2021-03-10 22:05:30,862 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3115 transitions. Word has length 20 [2021-03-10 22:05:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:30,862 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3115 transitions. [2021-03-10 22:05:30,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3115 transitions. [2021-03-10 22:05:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:30,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:30,863 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:31,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:31,064 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash 373166306, now seen corresponding path program 237 times [2021-03-10 22:05:31,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:31,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77130163] [2021-03-10 22:05:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:31,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77130163] [2021-03-10 22:05:31,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429801361] [2021-03-10 22:05:31,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:31,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:31,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:31,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:31,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:31,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:31,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749005473] [2021-03-10 22:05:31,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:31,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:31,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:31,359 INFO L87 Difference]: Start difference. First operand 899 states and 3115 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:32,128 INFO L93 Difference]: Finished difference Result 1050 states and 3529 transitions. [2021-03-10 22:05:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:32,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:32,130 INFO L225 Difference]: With dead ends: 1050 [2021-03-10 22:05:32,130 INFO L226 Difference]: Without dead ends: 1050 [2021-03-10 22:05:32,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 717.4ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:05:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-03-10 22:05:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 897. [2021-03-10 22:05:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.46875) internal successors, (3108), 896 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3108 transitions. [2021-03-10 22:05:32,139 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3108 transitions. Word has length 20 [2021-03-10 22:05:32,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:32,139 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3108 transitions. [2021-03-10 22:05:32,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3108 transitions. [2021-03-10 22:05:32,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:32,140 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:32,140 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:32,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3529 [2021-03-10 22:05:32,341 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash -265281438, now seen corresponding path program 238 times [2021-03-10 22:05:32,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:32,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256621291] [2021-03-10 22:05:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:32,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256621291] [2021-03-10 22:05:32,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428437409] [2021-03-10 22:05:32,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:32,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:32,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:32,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:32,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:32,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071201609] [2021-03-10 22:05:32,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:32,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:32,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:32,636 INFO L87 Difference]: Start difference. First operand 897 states and 3108 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:33,413 INFO L93 Difference]: Finished difference Result 1108 states and 3671 transitions. [2021-03-10 22:05:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:33,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:33,415 INFO L225 Difference]: With dead ends: 1108 [2021-03-10 22:05:33,415 INFO L226 Difference]: Without dead ends: 1108 [2021-03-10 22:05:33,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 756.2ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:05:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-03-10 22:05:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 893. [2021-03-10 22:05:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4663677130044843) internal successors, (3092), 892 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3092 transitions. [2021-03-10 22:05:33,425 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3092 transitions. Word has length 20 [2021-03-10 22:05:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:33,425 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3092 transitions. [2021-03-10 22:05:33,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3092 transitions. [2021-03-10 22:05:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:33,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:33,426 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:33,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3536,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:33,626 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash 917484642, now seen corresponding path program 239 times [2021-03-10 22:05:33,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:33,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381792490] [2021-03-10 22:05:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:33,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381792490] [2021-03-10 22:05:33,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833653445] [2021-03-10 22:05:33,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:33,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:33,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:33,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:33,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:33,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:33,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941155115] [2021-03-10 22:05:33,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:33,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:33,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:33,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:33,925 INFO L87 Difference]: Start difference. First operand 893 states and 3092 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:34,505 INFO L93 Difference]: Finished difference Result 1106 states and 3665 transitions. [2021-03-10 22:05:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:34,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:34,507 INFO L225 Difference]: With dead ends: 1106 [2021-03-10 22:05:34,507 INFO L226 Difference]: Without dead ends: 1106 [2021-03-10 22:05:34,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 542.7ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-03-10 22:05:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 894. [2021-03-10 22:05:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.469204927211646) internal successors, (3098), 893 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3098 transitions. [2021-03-10 22:05:34,517 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3098 transitions. Word has length 20 [2021-03-10 22:05:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:34,517 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 3098 transitions. [2021-03-10 22:05:34,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3098 transitions. [2021-03-10 22:05:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:34,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:34,518 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:34,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3540 [2021-03-10 22:05:34,719 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:34,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1039652314, now seen corresponding path program 240 times [2021-03-10 22:05:34,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:34,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174637951] [2021-03-10 22:05:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:34,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174637951] [2021-03-10 22:05:34,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923918135] [2021-03-10 22:05:34,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:34,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:34,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:34,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:34,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:35,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:35,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:35,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149768581] [2021-03-10 22:05:35,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:35,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:35,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:35,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:35,021 INFO L87 Difference]: Start difference. First operand 894 states and 3098 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:35,594 INFO L93 Difference]: Finished difference Result 1073 states and 3588 transitions. [2021-03-10 22:05:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:35,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:35,596 INFO L225 Difference]: With dead ends: 1073 [2021-03-10 22:05:35,596 INFO L226 Difference]: Without dead ends: 1073 [2021-03-10 22:05:35,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-03-10 22:05:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 890. [2021-03-10 22:05:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4611923509561304) internal successors, (3077), 889 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3077 transitions. [2021-03-10 22:05:35,605 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3077 transitions. Word has length 20 [2021-03-10 22:05:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:35,606 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 3077 transitions. [2021-03-10 22:05:35,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3077 transitions. [2021-03-10 22:05:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:35,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:35,607 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:35,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3546 [2021-03-10 22:05:35,807 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:35,807 INFO L82 PathProgramCache]: Analyzing trace with hash 622470852, now seen corresponding path program 241 times [2021-03-10 22:05:35,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:35,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156967620] [2021-03-10 22:05:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:35,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156967620] [2021-03-10 22:05:35,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114725524] [2021-03-10 22:05:35,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:35,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:36,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:36,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:36,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732932797] [2021-03-10 22:05:36,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:36,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:36,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:36,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:36,078 INFO L87 Difference]: Start difference. First operand 890 states and 3077 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:36,957 INFO L93 Difference]: Finished difference Result 1369 states and 4302 transitions. [2021-03-10 22:05:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:05:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:36,959 INFO L225 Difference]: With dead ends: 1369 [2021-03-10 22:05:36,959 INFO L226 Difference]: Without dead ends: 1369 [2021-03-10 22:05:36,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:05:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-03-10 22:05:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 898. [2021-03-10 22:05:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4749163879598663) internal successors, (3117), 897 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3117 transitions. [2021-03-10 22:05:36,971 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3117 transitions. Word has length 20 [2021-03-10 22:05:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:36,971 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3117 transitions. [2021-03-10 22:05:36,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3117 transitions. [2021-03-10 22:05:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:36,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:36,972 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:37,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:37,175 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:37,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1415635512, now seen corresponding path program 242 times [2021-03-10 22:05:37,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:37,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631552788] [2021-03-10 22:05:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:37,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631552788] [2021-03-10 22:05:37,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249908534] [2021-03-10 22:05:37,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:37,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:37,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:37,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:37,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:37,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:37,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:37,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319874082] [2021-03-10 22:05:37,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:37,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:37,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:37,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:37,511 INFO L87 Difference]: Start difference. First operand 898 states and 3117 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:38,249 INFO L93 Difference]: Finished difference Result 1208 states and 3928 transitions. [2021-03-10 22:05:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:38,251 INFO L225 Difference]: With dead ends: 1208 [2021-03-10 22:05:38,251 INFO L226 Difference]: Without dead ends: 1208 [2021-03-10 22:05:38,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 752.0ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:05:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-03-10 22:05:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 902. [2021-03-10 22:05:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4816870144284127) internal successors, (3137), 901 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3137 transitions. [2021-03-10 22:05:38,262 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3137 transitions. Word has length 20 [2021-03-10 22:05:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:38,262 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3137 transitions. [2021-03-10 22:05:38,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3137 transitions. [2021-03-10 22:05:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:38,263 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:38,263 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:38,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3559,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:38,463 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash -256127386, now seen corresponding path program 243 times [2021-03-10 22:05:38,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:38,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843662598] [2021-03-10 22:05:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:38,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843662598] [2021-03-10 22:05:38,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015951275] [2021-03-10 22:05:38,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:38,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:38,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:38,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:38,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:38,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193083915] [2021-03-10 22:05:38,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:38,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:38,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:38,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:38,804 INFO L87 Difference]: Start difference. First operand 902 states and 3137 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:39,609 INFO L93 Difference]: Finished difference Result 1153 states and 3793 transitions. [2021-03-10 22:05:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:39,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:39,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:39,611 INFO L225 Difference]: With dead ends: 1153 [2021-03-10 22:05:39,611 INFO L226 Difference]: Without dead ends: 1153 [2021-03-10 22:05:39,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 791.2ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:05:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-03-10 22:05:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 904. [2021-03-10 22:05:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.4839424141749724) internal successors, (3146), 903 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3146 transitions. [2021-03-10 22:05:39,621 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3146 transitions. Word has length 20 [2021-03-10 22:05:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:39,621 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 3146 transitions. [2021-03-10 22:05:39,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3146 transitions. [2021-03-10 22:05:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:39,622 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:39,623 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:39,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3575,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:39,823 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1373871290, now seen corresponding path program 244 times [2021-03-10 22:05:39,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:39,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255063066] [2021-03-10 22:05:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:39,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255063066] [2021-03-10 22:05:39,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589840223] [2021-03-10 22:05:39,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:39,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:39,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:39,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:40,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:40,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:40,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513909748] [2021-03-10 22:05:40,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:40,114 INFO L87 Difference]: Start difference. First operand 904 states and 3146 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:40,880 INFO L93 Difference]: Finished difference Result 1202 states and 3939 transitions. [2021-03-10 22:05:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:40,882 INFO L225 Difference]: With dead ends: 1202 [2021-03-10 22:05:40,882 INFO L226 Difference]: Without dead ends: 1202 [2021-03-10 22:05:40,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 723.4ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:05:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-03-10 22:05:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 897. [2021-03-10 22:05:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4732142857142856) internal successors, (3112), 896 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3112 transitions. [2021-03-10 22:05:40,893 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3112 transitions. Word has length 20 [2021-03-10 22:05:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:40,893 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3112 transitions. [2021-03-10 22:05:40,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3112 transitions. [2021-03-10 22:05:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:40,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:40,894 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:41,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:41,094 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2099261610, now seen corresponding path program 245 times [2021-03-10 22:05:41,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:41,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682436539] [2021-03-10 22:05:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:41,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682436539] [2021-03-10 22:05:41,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083463178] [2021-03-10 22:05:41,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:41,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:41,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:41,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:41,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:41,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:41,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494356834] [2021-03-10 22:05:41,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:41,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:41,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:41,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:41,387 INFO L87 Difference]: Start difference. First operand 897 states and 3112 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:42,130 INFO L93 Difference]: Finished difference Result 1165 states and 3846 transitions. [2021-03-10 22:05:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:42,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:42,132 INFO L225 Difference]: With dead ends: 1165 [2021-03-10 22:05:42,132 INFO L226 Difference]: Without dead ends: 1165 [2021-03-10 22:05:42,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 709.1ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:05:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-03-10 22:05:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 896. [2021-03-10 22:05:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.470391061452514) internal successors, (3106), 895 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3106 transitions. [2021-03-10 22:05:42,143 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3106 transitions. Word has length 20 [2021-03-10 22:05:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:42,143 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 3106 transitions. [2021-03-10 22:05:42,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3106 transitions. [2021-03-10 22:05:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:42,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:42,144 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:42,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3592,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:42,344 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash 827655738, now seen corresponding path program 246 times [2021-03-10 22:05:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:42,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092675581] [2021-03-10 22:05:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:42,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092675581] [2021-03-10 22:05:42,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094945959] [2021-03-10 22:05:42,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:42,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:42,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:42,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:42,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:42,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746721611] [2021-03-10 22:05:42,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:42,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:42,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:42,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:42,615 INFO L87 Difference]: Start difference. First operand 896 states and 3106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:43,203 INFO L93 Difference]: Finished difference Result 1195 states and 3886 transitions. [2021-03-10 22:05:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:43,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:43,205 INFO L225 Difference]: With dead ends: 1195 [2021-03-10 22:05:43,205 INFO L226 Difference]: Without dead ends: 1189 [2021-03-10 22:05:43,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 533.5ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-03-10 22:05:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 906. [2021-03-10 22:05:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.4640883977900554) internal successors, (3135), 905 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3135 transitions. [2021-03-10 22:05:43,215 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3135 transitions. Word has length 20 [2021-03-10 22:05:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:43,215 INFO L480 AbstractCegarLoop]: Abstraction has 906 states and 3135 transitions. [2021-03-10 22:05:43,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3135 transitions. [2021-03-10 22:05:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:43,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:43,216 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:43,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3599,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:43,416 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1087768188, now seen corresponding path program 247 times [2021-03-10 22:05:43,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:43,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955335010] [2021-03-10 22:05:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:43,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955335010] [2021-03-10 22:05:43,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601593348] [2021-03-10 22:05:43,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:43,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:43,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:43,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:43,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670101549] [2021-03-10 22:05:43,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:43,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:43,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:43,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:43,723 INFO L87 Difference]: Start difference. First operand 906 states and 3135 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:44,444 INFO L93 Difference]: Finished difference Result 1106 states and 3689 transitions. [2021-03-10 22:05:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:44,445 INFO L225 Difference]: With dead ends: 1106 [2021-03-10 22:05:44,445 INFO L226 Difference]: Without dead ends: 1106 [2021-03-10 22:05:44,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 706.2ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:05:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-03-10 22:05:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 896. [2021-03-10 22:05:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.470391061452514) internal successors, (3106), 895 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3106 transitions. [2021-03-10 22:05:44,455 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3106 transitions. Word has length 20 [2021-03-10 22:05:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:44,455 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 3106 transitions. [2021-03-10 22:05:44,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3106 transitions. [2021-03-10 22:05:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:44,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:44,456 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:44,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3607 [2021-03-10 22:05:44,656 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:44,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:44,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1323250086, now seen corresponding path program 248 times [2021-03-10 22:05:44,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:44,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942952227] [2021-03-10 22:05:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:44,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942952227] [2021-03-10 22:05:44,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369510569] [2021-03-10 22:05:44,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:44,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:44,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:44,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:44,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:44,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:44,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:44,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333591829] [2021-03-10 22:05:44,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:44,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:44,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:44,946 INFO L87 Difference]: Start difference. First operand 896 states and 3106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:45,570 INFO L93 Difference]: Finished difference Result 1114 states and 3682 transitions. [2021-03-10 22:05:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:45,572 INFO L225 Difference]: With dead ends: 1114 [2021-03-10 22:05:45,572 INFO L226 Difference]: Without dead ends: 1114 [2021-03-10 22:05:45,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 590.0ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-03-10 22:05:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 893. [2021-03-10 22:05:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4663677130044843) internal successors, (3092), 892 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3092 transitions. [2021-03-10 22:05:45,582 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3092 transitions. Word has length 20 [2021-03-10 22:05:45,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:45,582 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3092 transitions. [2021-03-10 22:05:45,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3092 transitions. [2021-03-10 22:05:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:45,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:45,583 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:45,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3614,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:45,784 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1347379442, now seen corresponding path program 249 times [2021-03-10 22:05:45,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:45,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616327632] [2021-03-10 22:05:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:45,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616327632] [2021-03-10 22:05:45,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192704563] [2021-03-10 22:05:45,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:45,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:45,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:46,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:46,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:46,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422058400] [2021-03-10 22:05:46,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:46,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:46,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:46,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:46,080 INFO L87 Difference]: Start difference. First operand 893 states and 3092 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:46,696 INFO L93 Difference]: Finished difference Result 1078 states and 3595 transitions. [2021-03-10 22:05:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:46,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:46,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:46,698 INFO L225 Difference]: With dead ends: 1078 [2021-03-10 22:05:46,698 INFO L226 Difference]: Without dead ends: 1078 [2021-03-10 22:05:46,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 600.1ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-03-10 22:05:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 890. [2021-03-10 22:05:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4611923509561304) internal successors, (3077), 889 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3077 transitions. [2021-03-10 22:05:46,707 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3077 transitions. Word has length 20 [2021-03-10 22:05:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:46,707 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 3077 transitions. [2021-03-10 22:05:46,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3077 transitions. [2021-03-10 22:05:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:46,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:46,708 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:46,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3625 [2021-03-10 22:05:46,909 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1683286498, now seen corresponding path program 250 times [2021-03-10 22:05:46,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:46,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846533247] [2021-03-10 22:05:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:46,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846533247] [2021-03-10 22:05:46,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299952920] [2021-03-10 22:05:46,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:47,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:47,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:47,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:47,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:47,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:47,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985126620] [2021-03-10 22:05:47,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:47,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:47,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:47,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:47,214 INFO L87 Difference]: Start difference. First operand 890 states and 3077 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:47,916 INFO L93 Difference]: Finished difference Result 1227 states and 3933 transitions. [2021-03-10 22:05:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:47,918 INFO L225 Difference]: With dead ends: 1227 [2021-03-10 22:05:47,918 INFO L226 Difference]: Without dead ends: 1227 [2021-03-10 22:05:47,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 694.7ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-03-10 22:05:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 897. [2021-03-10 22:05:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4620535714285716) internal successors, (3102), 896 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3102 transitions. [2021-03-10 22:05:47,928 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3102 transitions. Word has length 20 [2021-03-10 22:05:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:47,928 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3102 transitions. [2021-03-10 22:05:47,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3102 transitions. [2021-03-10 22:05:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:47,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:47,929 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:48,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:48,129 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:48,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash 727234354, now seen corresponding path program 251 times [2021-03-10 22:05:48,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:48,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134250075] [2021-03-10 22:05:48,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:48,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134250075] [2021-03-10 22:05:48,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512993673] [2021-03-10 22:05:48,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:48,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:48,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:48,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:48,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:48,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:48,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:48,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401377232] [2021-03-10 22:05:48,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:48,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:48,412 INFO L87 Difference]: Start difference. First operand 897 states and 3102 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:49,089 INFO L93 Difference]: Finished difference Result 1131 states and 3703 transitions. [2021-03-10 22:05:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:49,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:49,090 INFO L225 Difference]: With dead ends: 1131 [2021-03-10 22:05:49,090 INFO L226 Difference]: Without dead ends: 1119 [2021-03-10 22:05:49,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 674.7ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-03-10 22:05:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 897. [2021-03-10 22:05:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.458705357142857) internal successors, (3099), 896 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3099 transitions. [2021-03-10 22:05:49,100 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3099 transitions. Word has length 20 [2021-03-10 22:05:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:49,100 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3099 transitions. [2021-03-10 22:05:49,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3099 transitions. [2021-03-10 22:05:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:49,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:49,101 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:49,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3640,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:49,302 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:49,302 INFO L82 PathProgramCache]: Analyzing trace with hash 897232478, now seen corresponding path program 252 times [2021-03-10 22:05:49,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:49,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157088525] [2021-03-10 22:05:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157088525] [2021-03-10 22:05:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260186596] [2021-03-10 22:05:49,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:49,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:49,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:49,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:49,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:49,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339453676] [2021-03-10 22:05:49,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:49,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:49,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:49,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:49,601 INFO L87 Difference]: Start difference. First operand 897 states and 3099 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:50,064 INFO L93 Difference]: Finished difference Result 1092 states and 3633 transitions. [2021-03-10 22:05:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:50,066 INFO L225 Difference]: With dead ends: 1092 [2021-03-10 22:05:50,066 INFO L226 Difference]: Without dead ends: 1092 [2021-03-10 22:05:50,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:05:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-03-10 22:05:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 901. [2021-03-10 22:05:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.462222222222222) internal successors, (3116), 900 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3116 transitions. [2021-03-10 22:05:50,076 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3116 transitions. Word has length 20 [2021-03-10 22:05:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:50,076 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3116 transitions. [2021-03-10 22:05:50,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3116 transitions. [2021-03-10 22:05:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:50,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:50,077 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:50,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3649 [2021-03-10 22:05:50,278 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:50,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:50,278 INFO L82 PathProgramCache]: Analyzing trace with hash -793103700, now seen corresponding path program 253 times [2021-03-10 22:05:50,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:50,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107875317] [2021-03-10 22:05:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107875317] [2021-03-10 22:05:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549399430] [2021-03-10 22:05:50,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:50,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:50,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:50,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:50,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180799065] [2021-03-10 22:05:50,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:50,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:50,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:50,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:50,613 INFO L87 Difference]: Start difference. First operand 901 states and 3116 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:51,455 INFO L93 Difference]: Finished difference Result 1329 states and 4195 transitions. [2021-03-10 22:05:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:05:51,456 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:51,457 INFO L225 Difference]: With dead ends: 1329 [2021-03-10 22:05:51,457 INFO L226 Difference]: Without dead ends: 1329 [2021-03-10 22:05:51,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 797.6ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:05:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-10 22:05:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 906. [2021-03-10 22:05:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.4718232044198896) internal successors, (3142), 905 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3142 transitions. [2021-03-10 22:05:51,468 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3142 transitions. Word has length 20 [2021-03-10 22:05:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:51,468 INFO L480 AbstractCegarLoop]: Abstraction has 906 states and 3142 transitions. [2021-03-10 22:05:51,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3142 transitions. [2021-03-10 22:05:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:51,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:51,469 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:51,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:51,670 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:51,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:51,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1104749858, now seen corresponding path program 254 times [2021-03-10 22:05:51,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:51,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027092698] [2021-03-10 22:05:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:51,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027092698] [2021-03-10 22:05:51,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261946611] [2021-03-10 22:05:51,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:51,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:51,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:51,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:51,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:51,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:51,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:51,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330750621] [2021-03-10 22:05:51,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:51,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:51,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:51,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:51,950 INFO L87 Difference]: Start difference. First operand 906 states and 3142 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:52,610 INFO L93 Difference]: Finished difference Result 1219 states and 3947 transitions. [2021-03-10 22:05:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:52,612 INFO L225 Difference]: With dead ends: 1219 [2021-03-10 22:05:52,612 INFO L226 Difference]: Without dead ends: 1219 [2021-03-10 22:05:52,613 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:05:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-03-10 22:05:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 909. [2021-03-10 22:05:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 3.4768722466960353) internal successors, (3157), 908 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 3157 transitions. [2021-03-10 22:05:52,623 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 3157 transitions. Word has length 20 [2021-03-10 22:05:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:52,623 INFO L480 AbstractCegarLoop]: Abstraction has 909 states and 3157 transitions. [2021-03-10 22:05:52,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 3157 transitions. [2021-03-10 22:05:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:52,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:52,624 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:52,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3668 [2021-03-10 22:05:52,824 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:52,825 INFO L82 PathProgramCache]: Analyzing trace with hash -41703262, now seen corresponding path program 255 times [2021-03-10 22:05:52,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:52,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215397783] [2021-03-10 22:05:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:52,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215397783] [2021-03-10 22:05:52,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767219679] [2021-03-10 22:05:52,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:52,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:52,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:52,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:53,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:53,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:53,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427959485] [2021-03-10 22:05:53,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:53,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:53,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:53,211 INFO L87 Difference]: Start difference. First operand 909 states and 3157 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,733 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:05:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:53,938 INFO L93 Difference]: Finished difference Result 1167 states and 3815 transitions. [2021-03-10 22:05:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:53,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:53,940 INFO L225 Difference]: With dead ends: 1167 [2021-03-10 22:05:53,940 INFO L226 Difference]: Without dead ends: 1167 [2021-03-10 22:05:53,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 783.3ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-03-10 22:05:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 906. [2021-03-10 22:05:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.47292817679558) internal successors, (3143), 905 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3143 transitions. [2021-03-10 22:05:53,950 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3143 transitions. Word has length 20 [2021-03-10 22:05:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:53,950 INFO L480 AbstractCegarLoop]: Abstraction has 906 states and 3143 transitions. [2021-03-10 22:05:53,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3143 transitions. [2021-03-10 22:05:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:53,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:53,951 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:54,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:54,152 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:54,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1250639138, now seen corresponding path program 256 times [2021-03-10 22:05:54,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:54,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624135330] [2021-03-10 22:05:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:54,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624135330] [2021-03-10 22:05:54,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647362868] [2021-03-10 22:05:54,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:54,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:54,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:54,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:54,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:54,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:54,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841704496] [2021-03-10 22:05:54,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:54,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:54,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:54,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:54,491 INFO L87 Difference]: Start difference. First operand 906 states and 3143 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:55,180 INFO L93 Difference]: Finished difference Result 1153 states and 3778 transitions. [2021-03-10 22:05:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:55,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:55,182 INFO L225 Difference]: With dead ends: 1153 [2021-03-10 22:05:55,182 INFO L226 Difference]: Without dead ends: 1153 [2021-03-10 22:05:55,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 688.9ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:05:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-03-10 22:05:55,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 905. [2021-03-10 22:05:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 3.4701327433628317) internal successors, (3137), 904 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 3137 transitions. [2021-03-10 22:05:55,192 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 3137 transitions. Word has length 20 [2021-03-10 22:05:55,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:55,192 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 3137 transitions. [2021-03-10 22:05:55,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,192 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 3137 transitions. [2021-03-10 22:05:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:55,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:55,193 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:55,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3687 [2021-03-10 22:05:55,394 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:55,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash -20966734, now seen corresponding path program 257 times [2021-03-10 22:05:55,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:55,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76308043] [2021-03-10 22:05:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:55,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76308043] [2021-03-10 22:05:55,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241565608] [2021-03-10 22:05:55,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:55,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:55,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:55,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:55,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:55,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073460891] [2021-03-10 22:05:55,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:55,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:55,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:55,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:55,689 INFO L87 Difference]: Start difference. First operand 905 states and 3137 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:56,587 INFO L93 Difference]: Finished difference Result 1254 states and 4005 transitions. [2021-03-10 22:05:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:05:56,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:56,589 INFO L225 Difference]: With dead ends: 1254 [2021-03-10 22:05:56,589 INFO L226 Difference]: Without dead ends: 1248 [2021-03-10 22:05:56,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 809.2ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:05:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-10 22:05:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 915. [2021-03-10 22:05:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.461706783369803) internal successors, (3164), 914 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3164 transitions. [2021-03-10 22:05:56,601 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3164 transitions. Word has length 20 [2021-03-10 22:05:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:56,601 INFO L480 AbstractCegarLoop]: Abstraction has 915 states and 3164 transitions. [2021-03-10 22:05:56,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3164 transitions. [2021-03-10 22:05:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:56,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:56,602 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:56,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3695,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:56,803 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:56,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1936390660, now seen corresponding path program 258 times [2021-03-10 22:05:56,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:56,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961607401] [2021-03-10 22:05:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961607401] [2021-03-10 22:05:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893550631] [2021-03-10 22:05:56,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:56,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:56,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:56,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:57,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:57,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:57,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095827740] [2021-03-10 22:05:57,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:57,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:57,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:57,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:57,111 INFO L87 Difference]: Start difference. First operand 915 states and 3164 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:57,988 INFO L93 Difference]: Finished difference Result 1159 states and 3793 transitions. [2021-03-10 22:05:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:05:57,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:57,990 INFO L225 Difference]: With dead ends: 1159 [2021-03-10 22:05:57,990 INFO L226 Difference]: Without dead ends: 1159 [2021-03-10 22:05:57,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 826.7ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:05:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-03-10 22:05:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 905. [2021-03-10 22:05:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 3.4701327433628317) internal successors, (3137), 904 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 3137 transitions. [2021-03-10 22:05:58,001 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 3137 transitions. Word has length 20 [2021-03-10 22:05:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:58,001 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 3137 transitions. [2021-03-10 22:05:58,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 3137 transitions. [2021-03-10 22:05:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:58,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:58,002 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:58,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-03-10 22:05:58,202 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash 474627614, now seen corresponding path program 259 times [2021-03-10 22:05:58,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:58,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246408967] [2021-03-10 22:05:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:58,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246408967] [2021-03-10 22:05:58,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077726564] [2021-03-10 22:05:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:58,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:58,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:58,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:58,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893149397] [2021-03-10 22:05:58,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:58,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:58,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:58,500 INFO L87 Difference]: Start difference. First operand 905 states and 3137 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:59,039 INFO L93 Difference]: Finished difference Result 1223 states and 3986 transitions. [2021-03-10 22:05:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:59,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:59,041 INFO L225 Difference]: With dead ends: 1223 [2021-03-10 22:05:59,041 INFO L226 Difference]: Without dead ends: 1223 [2021-03-10 22:05:59,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 516.3ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:05:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-03-10 22:05:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 906. [2021-03-10 22:05:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.47292817679558) internal successors, (3143), 905 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3143 transitions. [2021-03-10 22:05:59,052 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3143 transitions. Word has length 20 [2021-03-10 22:05:59,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:59,052 INFO L480 AbstractCegarLoop]: Abstraction has 906 states and 3143 transitions. [2021-03-10 22:05:59,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3143 transitions. [2021-03-10 22:05:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:59,053 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:59,053 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:59,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3716 [2021-03-10 22:05:59,254 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:59,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2098965382, now seen corresponding path program 260 times [2021-03-10 22:05:59,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:59,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315772142] [2021-03-10 22:05:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:59,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315772142] [2021-03-10 22:05:59,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350289849] [2021-03-10 22:05:59,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:59,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:59,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:59,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:59,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:59,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:59,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:05:59,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20599212] [2021-03-10 22:05:59,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:59,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:59,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:59,562 INFO L87 Difference]: Start difference. First operand 906 states and 3143 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:00,088 INFO L93 Difference]: Finished difference Result 1220 states and 3971 transitions. [2021-03-10 22:06:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:00,090 INFO L225 Difference]: With dead ends: 1220 [2021-03-10 22:06:00,090 INFO L226 Difference]: Without dead ends: 1220 [2021-03-10 22:06:00,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-03-10 22:06:00,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 905. [2021-03-10 22:06:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 3.4701327433628317) internal successors, (3137), 904 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 3137 transitions. [2021-03-10 22:06:00,101 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 3137 transitions. Word has length 20 [2021-03-10 22:06:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:00,101 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 3137 transitions. [2021-03-10 22:06:00,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 3137 transitions. [2021-03-10 22:06:00,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:00,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:00,102 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:00,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3723,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:00,303 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:00,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:00,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2039824350, now seen corresponding path program 261 times [2021-03-10 22:06:00,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:00,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817919953] [2021-03-10 22:06:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:00,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817919953] [2021-03-10 22:06:00,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346100579] [2021-03-10 22:06:00,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:00,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:06:00,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:00,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:00,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:00,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:00,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:00,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953305178] [2021-03-10 22:06:00,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:00,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:00,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:00,630 INFO L87 Difference]: Start difference. First operand 905 states and 3137 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:01,275 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 22:06:01,415 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-10 22:06:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:01,557 INFO L93 Difference]: Finished difference Result 1133 states and 3725 transitions. [2021-03-10 22:06:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:01,559 INFO L225 Difference]: With dead ends: 1133 [2021-03-10 22:06:01,559 INFO L226 Difference]: Without dead ends: 1121 [2021-03-10 22:06:01,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 906.5ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:06:01,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-03-10 22:06:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 907. [2021-03-10 22:06:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.4701986754966887) internal successors, (3144), 906 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3144 transitions. [2021-03-10 22:06:01,569 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3144 transitions. Word has length 20 [2021-03-10 22:06:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:01,569 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 3144 transitions. [2021-03-10 22:06:01,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3144 transitions. [2021-03-10 22:06:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:01,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:01,570 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:01,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3730 [2021-03-10 22:06:01,783 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:01,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1288423912, now seen corresponding path program 262 times [2021-03-10 22:06:01,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:01,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358921713] [2021-03-10 22:06:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:01,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358921713] [2021-03-10 22:06:01,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224919356] [2021-03-10 22:06:01,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:01,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:01,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:01,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:02,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:02,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:02,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861961546] [2021-03-10 22:06:02,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:02,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:02,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:02,099 INFO L87 Difference]: Start difference. First operand 907 states and 3144 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:02,996 INFO L93 Difference]: Finished difference Result 1158 states and 3777 transitions. [2021-03-10 22:06:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:06:02,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:02,998 INFO L225 Difference]: With dead ends: 1158 [2021-03-10 22:06:02,998 INFO L226 Difference]: Without dead ends: 1152 [2021-03-10 22:06:02,998 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 854.8ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:06:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-03-10 22:06:03,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 917. [2021-03-10 22:06:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.4617903930131004) internal successors, (3171), 916 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 3171 transitions. [2021-03-10 22:06:03,008 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 3171 transitions. Word has length 20 [2021-03-10 22:06:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:03,008 INFO L480 AbstractCegarLoop]: Abstraction has 917 states and 3171 transitions. [2021-03-10 22:06:03,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 3171 transitions. [2021-03-10 22:06:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:03,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:03,009 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:03,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3739,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:03,209 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:03,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1091119458, now seen corresponding path program 263 times [2021-03-10 22:06:03,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:03,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739789856] [2021-03-10 22:06:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:03,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739789856] [2021-03-10 22:06:03,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554280938] [2021-03-10 22:06:03,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:03,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:03,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:03,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:03,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:03,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:03,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358528043] [2021-03-10 22:06:03,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:03,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:03,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:03,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:03,521 INFO L87 Difference]: Start difference. First operand 917 states and 3171 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:04,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:04,357 INFO L93 Difference]: Finished difference Result 1051 states and 3535 transitions. [2021-03-10 22:06:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:04,359 INFO L225 Difference]: With dead ends: 1051 [2021-03-10 22:06:04,359 INFO L226 Difference]: Without dead ends: 1051 [2021-03-10 22:06:04,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 779.6ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:06:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-03-10 22:06:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 907. [2021-03-10 22:06:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.4701986754966887) internal successors, (3144), 906 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3144 transitions. [2021-03-10 22:06:04,368 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3144 transitions. Word has length 20 [2021-03-10 22:06:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:04,368 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 3144 transitions. [2021-03-10 22:06:04,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:04,368 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3144 transitions. [2021-03-10 22:06:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:04,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:04,369 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:04,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3747 [2021-03-10 22:06:04,570 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:04,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1966715728, now seen corresponding path program 264 times [2021-03-10 22:06:04,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:04,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627762963] [2021-03-10 22:06:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:04,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627762963] [2021-03-10 22:06:04,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278340179] [2021-03-10 22:06:04,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:04,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:04,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:04,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:04,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:04,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:04,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311544854] [2021-03-10 22:06:04,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:04,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:04,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:04,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:04,845 INFO L87 Difference]: Start difference. First operand 907 states and 3144 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:05,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:05,297 INFO L93 Difference]: Finished difference Result 1093 states and 3648 transitions. [2021-03-10 22:06:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:05,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:05,299 INFO L225 Difference]: With dead ends: 1093 [2021-03-10 22:06:05,299 INFO L226 Difference]: Without dead ends: 1093 [2021-03-10 22:06:05,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 422.6ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:06:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-03-10 22:06:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 906. [2021-03-10 22:06:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.4718232044198896) internal successors, (3142), 905 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3142 transitions. [2021-03-10 22:06:05,309 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3142 transitions. Word has length 20 [2021-03-10 22:06:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:05,309 INFO L480 AbstractCegarLoop]: Abstraction has 906 states and 3142 transitions. [2021-03-10 22:06:05,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3142 transitions. [2021-03-10 22:06:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:05,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:05,310 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:05,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3754,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:05,511 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:05,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:05,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1215315290, now seen corresponding path program 265 times [2021-03-10 22:06:05,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:05,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562787640] [2021-03-10 22:06:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:05,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562787640] [2021-03-10 22:06:05,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464995479] [2021-03-10 22:06:05,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:05,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:05,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:05,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955036162] [2021-03-10 22:06:05,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:05,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:05,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:05,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:05,782 INFO L87 Difference]: Start difference. First operand 906 states and 3142 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:06,293 INFO L93 Difference]: Finished difference Result 1123 states and 3723 transitions. [2021-03-10 22:06:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:06,295 INFO L225 Difference]: With dead ends: 1123 [2021-03-10 22:06:06,295 INFO L226 Difference]: Without dead ends: 1123 [2021-03-10 22:06:06,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:06:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-03-10 22:06:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 906. [2021-03-10 22:06:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.4718232044198896) internal successors, (3142), 905 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3142 transitions. [2021-03-10 22:06:06,305 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3142 transitions. Word has length 20 [2021-03-10 22:06:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:06,305 INFO L480 AbstractCegarLoop]: Abstraction has 906 states and 3142 transitions. [2021-03-10 22:06:06,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3142 transitions. [2021-03-10 22:06:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:06,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:06,306 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:06,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-03-10 22:06:06,506 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:06,506 INFO L82 PathProgramCache]: Analyzing trace with hash 409022478, now seen corresponding path program 266 times [2021-03-10 22:06:06,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:06,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353221410] [2021-03-10 22:06:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:06,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353221410] [2021-03-10 22:06:06,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858303532] [2021-03-10 22:06:06,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:06,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:06,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:06,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:06,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:06,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:06,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:06,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853702698] [2021-03-10 22:06:06,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:06,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:06,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:06,818 INFO L87 Difference]: Start difference. First operand 906 states and 3142 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:07,359 INFO L93 Difference]: Finished difference Result 1081 states and 3621 transitions. [2021-03-10 22:06:07,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:07,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:07,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:07,361 INFO L225 Difference]: With dead ends: 1081 [2021-03-10 22:06:07,362 INFO L226 Difference]: Without dead ends: 1081 [2021-03-10 22:06:07,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:07,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-03-10 22:06:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 901. [2021-03-10 22:06:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4644444444444447) internal successors, (3118), 900 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3118 transitions. [2021-03-10 22:06:07,371 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3118 transitions. Word has length 20 [2021-03-10 22:06:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:07,371 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3118 transitions. [2021-03-10 22:06:07,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3118 transitions. [2021-03-10 22:06:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:07,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:07,372 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:07,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3766,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:07,573 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1048453396, now seen corresponding path program 267 times [2021-03-10 22:06:07,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:07,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301005145] [2021-03-10 22:06:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:07,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301005145] [2021-03-10 22:06:07,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13587639] [2021-03-10 22:06:07,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:07,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:06:07,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:07,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:07,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:07,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:07,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839640268] [2021-03-10 22:06:07,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:07,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:07,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:07,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:07,846 INFO L87 Difference]: Start difference. First operand 901 states and 3118 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:08,244 INFO L93 Difference]: Finished difference Result 1075 states and 3585 transitions. [2021-03-10 22:06:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:08,246 INFO L225 Difference]: With dead ends: 1075 [2021-03-10 22:06:08,246 INFO L226 Difference]: Without dead ends: 1075 [2021-03-10 22:06:08,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 413.9ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-03-10 22:06:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 904. [2021-03-10 22:06:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.4617940199335546) internal successors, (3126), 903 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3126 transitions. [2021-03-10 22:06:08,256 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3126 transitions. Word has length 20 [2021-03-10 22:06:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:08,256 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 3126 transitions. [2021-03-10 22:06:08,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3126 transitions. [2021-03-10 22:06:08,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:08,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:08,257 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:08,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3773,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:08,458 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:08,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1756811614, now seen corresponding path program 268 times [2021-03-10 22:06:08,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:08,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142752553] [2021-03-10 22:06:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:08,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142752553] [2021-03-10 22:06:08,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865072459] [2021-03-10 22:06:08,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:08,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:08,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:08,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:08,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519551533] [2021-03-10 22:06:08,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:08,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:08,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:08,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:08,688 INFO L87 Difference]: Start difference. First operand 904 states and 3126 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:08,992 INFO L93 Difference]: Finished difference Result 1098 states and 3645 transitions. [2021-03-10 22:06:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:08,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:08,994 INFO L225 Difference]: With dead ends: 1098 [2021-03-10 22:06:08,994 INFO L226 Difference]: Without dead ends: 1098 [2021-03-10 22:06:08,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-03-10 22:06:09,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 901. [2021-03-10 22:06:09,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4644444444444447) internal successors, (3118), 900 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3118 transitions. [2021-03-10 22:06:09,004 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3118 transitions. Word has length 20 [2021-03-10 22:06:09,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:09,004 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3118 transitions. [2021-03-10 22:06:09,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3118 transitions. [2021-03-10 22:06:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:09,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:09,006 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:09,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3775 [2021-03-10 22:06:09,206 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:09,206 INFO L82 PathProgramCache]: Analyzing trace with hash 216979574, now seen corresponding path program 269 times [2021-03-10 22:06:09,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:09,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143850958] [2021-03-10 22:06:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:09,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143850958] [2021-03-10 22:06:09,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083169048] [2021-03-10 22:06:09,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:09,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:09,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:09,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:09,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:09,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:09,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:09,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544739052] [2021-03-10 22:06:09,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:09,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:09,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:09,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:09,452 INFO L87 Difference]: Start difference. First operand 901 states and 3118 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:09,793 INFO L93 Difference]: Finished difference Result 1103 states and 3641 transitions. [2021-03-10 22:06:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:09,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:09,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:09,795 INFO L225 Difference]: With dead ends: 1103 [2021-03-10 22:06:09,795 INFO L226 Difference]: Without dead ends: 1103 [2021-03-10 22:06:09,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-03-10 22:06:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 901. [2021-03-10 22:06:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4644444444444447) internal successors, (3118), 900 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3118 transitions. [2021-03-10 22:06:09,805 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3118 transitions. Word has length 20 [2021-03-10 22:06:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:09,805 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3118 transitions. [2021-03-10 22:06:09,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3118 transitions. [2021-03-10 22:06:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:09,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:09,806 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:10,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3780 [2021-03-10 22:06:10,007 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1010144234, now seen corresponding path program 270 times [2021-03-10 22:06:10,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:10,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261514083] [2021-03-10 22:06:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:10,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261514083] [2021-03-10 22:06:10,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810998471] [2021-03-10 22:06:10,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:10,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:10,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:10,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:10,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382785307] [2021-03-10 22:06:10,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:10,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:10,235 INFO L87 Difference]: Start difference. First operand 901 states and 3118 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:10,813 INFO L93 Difference]: Finished difference Result 1232 states and 3972 transitions. [2021-03-10 22:06:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:06:10,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:10,815 INFO L225 Difference]: With dead ends: 1232 [2021-03-10 22:06:10,815 INFO L226 Difference]: Without dead ends: 1232 [2021-03-10 22:06:10,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:06:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-03-10 22:06:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 910. [2021-03-10 22:06:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.4697469746974696) internal successors, (3154), 909 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3154 transitions. [2021-03-10 22:06:10,826 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3154 transitions. Word has length 20 [2021-03-10 22:06:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:10,826 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 3154 transitions. [2021-03-10 22:06:10,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3154 transitions. [2021-03-10 22:06:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:10,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:10,827 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:11,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3785,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:11,027 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:11,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1306024650, now seen corresponding path program 271 times [2021-03-10 22:06:11,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:11,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497880727] [2021-03-10 22:06:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:11,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497880727] [2021-03-10 22:06:11,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685017446] [2021-03-10 22:06:11,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:11,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:11,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:11,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:11,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659667855] [2021-03-10 22:06:11,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:11,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:11,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:11,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:11,264 INFO L87 Difference]: Start difference. First operand 910 states and 3154 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:11,619 INFO L93 Difference]: Finished difference Result 1073 states and 3581 transitions. [2021-03-10 22:06:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:11,621 INFO L225 Difference]: With dead ends: 1073 [2021-03-10 22:06:11,621 INFO L226 Difference]: Without dead ends: 1061 [2021-03-10 22:06:11,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-03-10 22:06:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 910. [2021-03-10 22:06:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.4664466446644666) internal successors, (3151), 909 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3151 transitions. [2021-03-10 22:06:11,631 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3151 transitions. Word has length 20 [2021-03-10 22:06:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:11,631 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 3151 transitions. [2021-03-10 22:06:11,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3151 transitions. [2021-03-10 22:06:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:11,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:11,632 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:11,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3790 [2021-03-10 22:06:11,832 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:11,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1136026526, now seen corresponding path program 272 times [2021-03-10 22:06:11,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:11,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042335653] [2021-03-10 22:06:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:11,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042335653] [2021-03-10 22:06:11,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61519150] [2021-03-10 22:06:11,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:11,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:11,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:11,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:11,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:12,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:12,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:12,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123443283] [2021-03-10 22:06:12,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:12,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:12,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:12,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:12,070 INFO L87 Difference]: Start difference. First operand 910 states and 3151 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:12,455 INFO L93 Difference]: Finished difference Result 1155 states and 3781 transitions. [2021-03-10 22:06:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:12,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:12,457 INFO L225 Difference]: With dead ends: 1155 [2021-03-10 22:06:12,458 INFO L226 Difference]: Without dead ends: 1155 [2021-03-10 22:06:12,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-03-10 22:06:12,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 898. [2021-03-10 22:06:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.46711259754738) internal successors, (3110), 897 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3110 transitions. [2021-03-10 22:06:12,468 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3110 transitions. Word has length 20 [2021-03-10 22:06:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:12,468 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3110 transitions. [2021-03-10 22:06:12,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3110 transitions. [2021-03-10 22:06:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:12,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:12,469 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:12,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3794,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:12,670 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1678669926, now seen corresponding path program 273 times [2021-03-10 22:06:12,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:12,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271569252] [2021-03-10 22:06:12,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:12,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271569252] [2021-03-10 22:06:12,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269200959] [2021-03-10 22:06:12,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:12,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:12,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:12,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:12,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:12,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:12,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424053003] [2021-03-10 22:06:12,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:12,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:12,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:12,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:12,926 INFO L87 Difference]: Start difference. First operand 898 states and 3110 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:13,355 INFO L93 Difference]: Finished difference Result 1179 states and 3830 transitions. [2021-03-10 22:06:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:13,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:13,356 INFO L225 Difference]: With dead ends: 1179 [2021-03-10 22:06:13,356 INFO L226 Difference]: Without dead ends: 1179 [2021-03-10 22:06:13,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-03-10 22:06:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 901. [2021-03-10 22:06:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4677777777777776) internal successors, (3121), 900 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3121 transitions. [2021-03-10 22:06:13,366 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3121 transitions. Word has length 20 [2021-03-10 22:06:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:13,366 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3121 transitions. [2021-03-10 22:06:13,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3121 transitions. [2021-03-10 22:06:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:13,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:13,367 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:13,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3797,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:13,568 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:13,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1660245226, now seen corresponding path program 274 times [2021-03-10 22:06:13,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:13,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304062288] [2021-03-10 22:06:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:13,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304062288] [2021-03-10 22:06:13,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759734342] [2021-03-10 22:06:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:13,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:13,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:13,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:13,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:13,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:13,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:13,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463765582] [2021-03-10 22:06:13,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:13,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:13,829 INFO L87 Difference]: Start difference. First operand 901 states and 3121 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:14,259 INFO L93 Difference]: Finished difference Result 1149 states and 3758 transitions. [2021-03-10 22:06:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:14,261 INFO L225 Difference]: With dead ends: 1149 [2021-03-10 22:06:14,261 INFO L226 Difference]: Without dead ends: 1137 [2021-03-10 22:06:14,261 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-03-10 22:06:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 898. [2021-03-10 22:06:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.46711259754738) internal successors, (3110), 897 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3110 transitions. [2021-03-10 22:06:14,271 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3110 transitions. Word has length 20 [2021-03-10 22:06:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:14,271 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3110 transitions. [2021-03-10 22:06:14,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3110 transitions. [2021-03-10 22:06:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:14,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:14,272 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:14,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3804,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:14,472 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:14,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2046976748, now seen corresponding path program 275 times [2021-03-10 22:06:14,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:14,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636666018] [2021-03-10 22:06:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:14,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636666018] [2021-03-10 22:06:14,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968516682] [2021-03-10 22:06:14,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:14,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:14,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:14,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:14,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:14,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:14,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313301872] [2021-03-10 22:06:14,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:14,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:14,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:14,698 INFO L87 Difference]: Start difference. First operand 898 states and 3110 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:15,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:15,059 INFO L93 Difference]: Finished difference Result 1140 states and 3734 transitions. [2021-03-10 22:06:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:15,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:15,061 INFO L225 Difference]: With dead ends: 1140 [2021-03-10 22:06:15,061 INFO L226 Difference]: Without dead ends: 1122 [2021-03-10 22:06:15,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-03-10 22:06:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 892. [2021-03-10 22:06:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4691358024691357) internal successors, (3091), 891 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3091 transitions. [2021-03-10 22:06:15,071 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3091 transitions. Word has length 20 [2021-03-10 22:06:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:15,071 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3091 transitions. [2021-03-10 22:06:15,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3091 transitions. [2021-03-10 22:06:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:15,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:15,073 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:15,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-03-10 22:06:15,273 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2107583078, now seen corresponding path program 276 times [2021-03-10 22:06:15,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:15,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344122889] [2021-03-10 22:06:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:15,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344122889] [2021-03-10 22:06:15,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961300365] [2021-03-10 22:06:15,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:15,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:06:15,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:15,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:15,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:15,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:15,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:15,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077890817] [2021-03-10 22:06:15,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:15,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:15,571 INFO L87 Difference]: Start difference. First operand 892 states and 3091 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:16,120 INFO L93 Difference]: Finished difference Result 1057 states and 3532 transitions. [2021-03-10 22:06:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:16,122 INFO L225 Difference]: With dead ends: 1057 [2021-03-10 22:06:16,122 INFO L226 Difference]: Without dead ends: 1057 [2021-03-10 22:06:16,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-03-10 22:06:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 898. [2021-03-10 22:06:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.463768115942029) internal successors, (3107), 897 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3107 transitions. [2021-03-10 22:06:16,132 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3107 transitions. Word has length 20 [2021-03-10 22:06:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:16,132 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3107 transitions. [2021-03-10 22:06:16,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3107 transitions. [2021-03-10 22:06:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:16,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:16,133 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:16,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3813 [2021-03-10 22:06:16,334 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:16,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:16,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1399224860, now seen corresponding path program 277 times [2021-03-10 22:06:16,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:16,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225319155] [2021-03-10 22:06:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:16,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225319155] [2021-03-10 22:06:16,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219208999] [2021-03-10 22:06:16,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:16,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:16,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:16,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:16,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730645476] [2021-03-10 22:06:16,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:16,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:16,586 INFO L87 Difference]: Start difference. First operand 898 states and 3107 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:17,092 INFO L93 Difference]: Finished difference Result 1128 states and 3706 transitions. [2021-03-10 22:06:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:17,094 INFO L225 Difference]: With dead ends: 1128 [2021-03-10 22:06:17,094 INFO L226 Difference]: Without dead ends: 1128 [2021-03-10 22:06:17,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 472.7ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:06:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-03-10 22:06:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 895. [2021-03-10 22:06:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.466442953020134) internal successors, (3099), 894 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3099 transitions. [2021-03-10 22:06:17,104 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3099 transitions. Word has length 20 [2021-03-10 22:06:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:17,104 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3099 transitions. [2021-03-10 22:06:17,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3099 transitions. [2021-03-10 22:06:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:17,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:17,105 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:17,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-03-10 22:06:17,305 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash 788958316, now seen corresponding path program 278 times [2021-03-10 22:06:17,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:17,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185818705] [2021-03-10 22:06:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:17,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185818705] [2021-03-10 22:06:17,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320990971] [2021-03-10 22:06:17,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:17,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:17,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:17,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:17,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:17,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:17,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631518574] [2021-03-10 22:06:17,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:17,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:17,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:17,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:17,583 INFO L87 Difference]: Start difference. First operand 895 states and 3099 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:17,977 INFO L93 Difference]: Finished difference Result 1085 states and 3588 transitions. [2021-03-10 22:06:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:17,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:17,979 INFO L225 Difference]: With dead ends: 1085 [2021-03-10 22:06:17,979 INFO L226 Difference]: Without dead ends: 1085 [2021-03-10 22:06:17,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:06:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-03-10 22:06:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 895. [2021-03-10 22:06:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.466442953020134) internal successors, (3099), 894 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3099 transitions. [2021-03-10 22:06:17,989 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3099 transitions. Word has length 20 [2021-03-10 22:06:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:17,989 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3099 transitions. [2021-03-10 22:06:17,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3099 transitions. [2021-03-10 22:06:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:17,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:17,990 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:18,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3819 [2021-03-10 22:06:18,190 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:18,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2145892240, now seen corresponding path program 279 times [2021-03-10 22:06:18,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:18,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972445272] [2021-03-10 22:06:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:18,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972445272] [2021-03-10 22:06:18,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688096231] [2021-03-10 22:06:18,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:18,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:18,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:18,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:18,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:18,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:18,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:18,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653537933] [2021-03-10 22:06:18,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:18,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:18,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:18,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:18,456 INFO L87 Difference]: Start difference. First operand 895 states and 3099 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:19,266 INFO L93 Difference]: Finished difference Result 1260 states and 4028 transitions. [2021-03-10 22:06:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:06:19,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:19,268 INFO L225 Difference]: With dead ends: 1260 [2021-03-10 22:06:19,268 INFO L226 Difference]: Without dead ends: 1260 [2021-03-10 22:06:19,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:06:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-03-10 22:06:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 904. [2021-03-10 22:06:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.471760797342193) internal successors, (3135), 903 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3135 transitions. [2021-03-10 22:06:19,278 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3135 transitions. Word has length 20 [2021-03-10 22:06:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:19,278 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 3135 transitions. [2021-03-10 22:06:19,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3135 transitions. [2021-03-10 22:06:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:19,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:19,279 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:19,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3826,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:19,480 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -167093828, now seen corresponding path program 280 times [2021-03-10 22:06:19,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:19,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258420145] [2021-03-10 22:06:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:19,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258420145] [2021-03-10 22:06:19,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759782030] [2021-03-10 22:06:19,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:19,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:19,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:19,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:19,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:19,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:19,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:19,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704214359] [2021-03-10 22:06:19,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:19,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:19,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:19,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:19,750 INFO L87 Difference]: Start difference. First operand 904 states and 3135 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:20,184 INFO L93 Difference]: Finished difference Result 1103 states and 3642 transitions. [2021-03-10 22:06:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:20,186 INFO L225 Difference]: With dead ends: 1103 [2021-03-10 22:06:20,186 INFO L226 Difference]: Without dead ends: 1091 [2021-03-10 22:06:20,186 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 415.4ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:06:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-03-10 22:06:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 904. [2021-03-10 22:06:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.46843853820598) internal successors, (3132), 903 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3132 transitions. [2021-03-10 22:06:20,196 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3132 transitions. Word has length 20 [2021-03-10 22:06:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:20,196 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 3132 transitions. [2021-03-10 22:06:20,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3132 transitions. [2021-03-10 22:06:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:20,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:20,197 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:20,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3831,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:20,397 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:20,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2904296, now seen corresponding path program 281 times [2021-03-10 22:06:20,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:20,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022992915] [2021-03-10 22:06:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:20,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022992915] [2021-03-10 22:06:20,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161696131] [2021-03-10 22:06:20,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:20,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:20,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:20,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:20,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:20,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:20,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660603109] [2021-03-10 22:06:20,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:20,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:20,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:20,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:20,656 INFO L87 Difference]: Start difference. First operand 904 states and 3132 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:21,138 INFO L93 Difference]: Finished difference Result 1136 states and 3726 transitions. [2021-03-10 22:06:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:21,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:21,140 INFO L225 Difference]: With dead ends: 1136 [2021-03-10 22:06:21,140 INFO L226 Difference]: Without dead ends: 1136 [2021-03-10 22:06:21,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 404.1ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-03-10 22:06:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 892. [2021-03-10 22:06:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4691358024691357) internal successors, (3091), 891 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3091 transitions. [2021-03-10 22:06:21,150 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3091 transitions. Word has length 20 [2021-03-10 22:06:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:21,150 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3091 transitions. [2021-03-10 22:06:21,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3091 transitions. [2021-03-10 22:06:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:21,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:21,151 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:21,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3835 [2021-03-10 22:06:21,351 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1566267888, now seen corresponding path program 282 times [2021-03-10 22:06:21,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:21,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878966886] [2021-03-10 22:06:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:21,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878966886] [2021-03-10 22:06:21,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497216739] [2021-03-10 22:06:21,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:21,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:06:21,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:21,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:21,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:21,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:21,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:21,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613062402] [2021-03-10 22:06:21,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:21,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:21,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:21,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:21,659 INFO L87 Difference]: Start difference. First operand 892 states and 3091 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:22,358 INFO L93 Difference]: Finished difference Result 1095 states and 3634 transitions. [2021-03-10 22:06:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:06:22,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:22,360 INFO L225 Difference]: With dead ends: 1095 [2021-03-10 22:06:22,360 INFO L226 Difference]: Without dead ends: 1095 [2021-03-10 22:06:22,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 690.9ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:06:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-03-10 22:06:22,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 899. [2021-03-10 22:06:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.469933184855234) internal successors, (3116), 898 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3116 transitions. [2021-03-10 22:06:22,370 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3116 transitions. Word has length 20 [2021-03-10 22:06:22,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:22,370 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3116 transitions. [2021-03-10 22:06:22,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:22,370 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3116 transitions. [2021-03-10 22:06:22,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:22,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:22,371 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:22,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3838,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:22,571 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:22,572 INFO L82 PathProgramCache]: Analyzing trace with hash -857909670, now seen corresponding path program 283 times [2021-03-10 22:06:22,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:22,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414558752] [2021-03-10 22:06:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:22,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414558752] [2021-03-10 22:06:22,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473873359] [2021-03-10 22:06:22,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:22,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:22,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:22,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:22,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681418822] [2021-03-10 22:06:22,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:22,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:22,881 INFO L87 Difference]: Start difference. First operand 899 states and 3116 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:23,558 INFO L93 Difference]: Finished difference Result 1242 states and 3968 transitions. [2021-03-10 22:06:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:06:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:23,560 INFO L225 Difference]: With dead ends: 1242 [2021-03-10 22:06:23,560 INFO L226 Difference]: Without dead ends: 1242 [2021-03-10 22:06:23,560 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:06:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-03-10 22:06:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 899. [2021-03-10 22:06:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4766146993318485) internal successors, (3122), 898 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3122 transitions. [2021-03-10 22:06:23,571 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3122 transitions. Word has length 20 [2021-03-10 22:06:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:23,571 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3122 transitions. [2021-03-10 22:06:23,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3122 transitions. [2021-03-10 22:06:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:23,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:23,572 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:23,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3843 [2021-03-10 22:06:23,772 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:23,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1267059590, now seen corresponding path program 284 times [2021-03-10 22:06:23,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:23,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701452872] [2021-03-10 22:06:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:23,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701452872] [2021-03-10 22:06:23,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376861727] [2021-03-10 22:06:23,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:23,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:24,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:24,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:24,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733841273] [2021-03-10 22:06:24,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:24,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:24,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:24,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:24,084 INFO L87 Difference]: Start difference. First operand 899 states and 3122 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:24,592 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 22:06:24,903 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-10 22:06:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:24,970 INFO L93 Difference]: Finished difference Result 1113 states and 3665 transitions. [2021-03-10 22:06:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:24,972 INFO L225 Difference]: With dead ends: 1113 [2021-03-10 22:06:24,972 INFO L226 Difference]: Without dead ends: 1099 [2021-03-10 22:06:24,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 850.3ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:06:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-03-10 22:06:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 901. [2021-03-10 22:06:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4766666666666666) internal successors, (3129), 900 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3129 transitions. [2021-03-10 22:06:24,981 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3129 transitions. Word has length 20 [2021-03-10 22:06:24,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:24,981 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3129 transitions. [2021-03-10 22:06:24,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3129 transitions. [2021-03-10 22:06:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:24,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:24,982 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:25,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3850,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:25,182 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:25,183 INFO L82 PathProgramCache]: Analyzing trace with hash 890756954, now seen corresponding path program 285 times [2021-03-10 22:06:25,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:25,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164723097] [2021-03-10 22:06:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:25,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164723097] [2021-03-10 22:06:25,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041659883] [2021-03-10 22:06:25,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:25,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:06:25,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:25,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:25,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:25,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:25,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098482906] [2021-03-10 22:06:25,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:25,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:25,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:25,511 INFO L87 Difference]: Start difference. First operand 901 states and 3129 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,036 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 22:06:26,289 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-10 22:06:26,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:26,382 INFO L93 Difference]: Finished difference Result 1042 states and 3504 transitions. [2021-03-10 22:06:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:26,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:26,384 INFO L225 Difference]: With dead ends: 1042 [2021-03-10 22:06:26,384 INFO L226 Difference]: Without dead ends: 1042 [2021-03-10 22:06:26,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 842.2ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:06:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-03-10 22:06:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 899. [2021-03-10 22:06:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4766146993318485) internal successors, (3122), 898 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3122 transitions. [2021-03-10 22:06:26,393 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3122 transitions. Word has length 20 [2021-03-10 22:06:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:26,393 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3122 transitions. [2021-03-10 22:06:26,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3122 transitions. [2021-03-10 22:06:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:26,394 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:26,394 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:26,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3857 [2021-03-10 22:06:26,595 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:26,595 INFO L82 PathProgramCache]: Analyzing trace with hash 252309210, now seen corresponding path program 286 times [2021-03-10 22:06:26,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:26,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533577505] [2021-03-10 22:06:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:26,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533577505] [2021-03-10 22:06:26,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312443831] [2021-03-10 22:06:26,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:26,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:26,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:26,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:26,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:26,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:26,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769136554] [2021-03-10 22:06:26,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:26,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:26,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:26,913 INFO L87 Difference]: Start difference. First operand 899 states and 3122 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:27,668 INFO L93 Difference]: Finished difference Result 1100 states and 3648 transitions. [2021-03-10 22:06:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:27,670 INFO L225 Difference]: With dead ends: 1100 [2021-03-10 22:06:27,670 INFO L226 Difference]: Without dead ends: 1100 [2021-03-10 22:06:27,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 744.8ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:06:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-03-10 22:06:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 895. [2021-03-10 22:06:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4742729306487696) internal successors, (3106), 894 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3106 transitions. [2021-03-10 22:06:27,680 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3106 transitions. Word has length 20 [2021-03-10 22:06:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:27,680 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3106 transitions. [2021-03-10 22:06:27,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3106 transitions. [2021-03-10 22:06:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:27,681 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:27,681 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:27,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3863,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:27,882 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:27,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1435075290, now seen corresponding path program 287 times [2021-03-10 22:06:27,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:27,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622786219] [2021-03-10 22:06:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:27,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622786219] [2021-03-10 22:06:27,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835372651] [2021-03-10 22:06:27,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:28,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:28,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:28,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:28,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:28,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:28,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:28,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382801488] [2021-03-10 22:06:28,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:28,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:28,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:28,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:28,170 INFO L87 Difference]: Start difference. First operand 895 states and 3106 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:28,721 INFO L93 Difference]: Finished difference Result 1098 states and 3642 transitions. [2021-03-10 22:06:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:28,723 INFO L225 Difference]: With dead ends: 1098 [2021-03-10 22:06:28,723 INFO L226 Difference]: Without dead ends: 1098 [2021-03-10 22:06:28,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:06:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-03-10 22:06:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 896. [2021-03-10 22:06:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.477094972067039) internal successors, (3112), 895 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3112 transitions. [2021-03-10 22:06:28,732 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3112 transitions. Word has length 20 [2021-03-10 22:06:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:28,732 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 3112 transitions. [2021-03-10 22:06:28,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3112 transitions. [2021-03-10 22:06:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:28,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:28,734 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:28,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3868,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:28,934 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:28,934 INFO L82 PathProgramCache]: Analyzing trace with hash -522061666, now seen corresponding path program 288 times [2021-03-10 22:06:28,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:28,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212950669] [2021-03-10 22:06:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212950669] [2021-03-10 22:06:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127814898] [2021-03-10 22:06:29,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:29,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:06:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:29,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:29,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:29,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:29,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280335257] [2021-03-10 22:06:29,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:29,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:29,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:29,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:29,215 INFO L87 Difference]: Start difference. First operand 896 states and 3112 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:29,757 INFO L93 Difference]: Finished difference Result 1065 states and 3565 transitions. [2021-03-10 22:06:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:29,759 INFO L225 Difference]: With dead ends: 1065 [2021-03-10 22:06:29,759 INFO L226 Difference]: Without dead ends: 1065 [2021-03-10 22:06:29,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-03-10 22:06:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 892. [2021-03-10 22:06:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4691358024691357) internal successors, (3091), 891 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3091 transitions. [2021-03-10 22:06:29,768 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3091 transitions. Word has length 20 [2021-03-10 22:06:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:29,768 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3091 transitions. [2021-03-10 22:06:29,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3091 transitions. [2021-03-10 22:06:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:29,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:29,769 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:29,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3874,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:29,970 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1140061500, now seen corresponding path program 289 times [2021-03-10 22:06:29,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:29,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605490053] [2021-03-10 22:06:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:30,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605490053] [2021-03-10 22:06:30,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218552310] [2021-03-10 22:06:30,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:30,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:30,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:30,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:30,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:30,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127547552] [2021-03-10 22:06:30,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:30,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:30,246 INFO L87 Difference]: Start difference. First operand 892 states and 3091 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:30,919 INFO L93 Difference]: Finished difference Result 1239 states and 3990 transitions. [2021-03-10 22:06:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:30,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:30,921 INFO L225 Difference]: With dead ends: 1239 [2021-03-10 22:06:30,921 INFO L226 Difference]: Without dead ends: 1239 [2021-03-10 22:06:30,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:06:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-03-10 22:06:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 899. [2021-03-10 22:06:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.479955456570156) internal successors, (3125), 898 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3125 transitions. [2021-03-10 22:06:30,932 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3125 transitions. Word has length 20 [2021-03-10 22:06:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:30,932 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3125 transitions. [2021-03-10 22:06:30,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3125 transitions. [2021-03-10 22:06:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:30,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:30,933 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:31,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3881 [2021-03-10 22:06:31,133 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:31,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:31,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1933226160, now seen corresponding path program 290 times [2021-03-10 22:06:31,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:31,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483269349] [2021-03-10 22:06:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:31,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483269349] [2021-03-10 22:06:31,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878975990] [2021-03-10 22:06:31,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:31,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:31,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:31,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:31,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:31,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:31,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965843569] [2021-03-10 22:06:31,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:31,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:31,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:31,437 INFO L87 Difference]: Start difference. First operand 899 states and 3125 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:32,324 INFO L93 Difference]: Finished difference Result 1274 states and 4078 transitions. [2021-03-10 22:06:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:06:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:32,326 INFO L225 Difference]: With dead ends: 1274 [2021-03-10 22:06:32,326 INFO L226 Difference]: Without dead ends: 1274 [2021-03-10 22:06:32,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 793.6ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:06:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-03-10 22:06:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 903. [2021-03-10 22:06:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.4866962305986697) internal successors, (3145), 902 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3145 transitions. [2021-03-10 22:06:32,337 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3145 transitions. Word has length 20 [2021-03-10 22:06:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:32,337 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 3145 transitions. [2021-03-10 22:06:32,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:32,337 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3145 transitions. [2021-03-10 22:06:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:32,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:32,338 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:32,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3889 [2021-03-10 22:06:32,539 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:32,539 INFO L82 PathProgramCache]: Analyzing trace with hash 261463262, now seen corresponding path program 291 times [2021-03-10 22:06:32,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:32,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575682974] [2021-03-10 22:06:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:32,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575682974] [2021-03-10 22:06:32,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508239565] [2021-03-10 22:06:32,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:32,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:06:32,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:32,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:32,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:32,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:32,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:32,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43733317] [2021-03-10 22:06:32,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:32,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:32,848 INFO L87 Difference]: Start difference. First operand 903 states and 3145 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:33,784 INFO L93 Difference]: Finished difference Result 1142 states and 3759 transitions. [2021-03-10 22:06:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:06:33,784 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:33,786 INFO L225 Difference]: With dead ends: 1142 [2021-03-10 22:06:33,786 INFO L226 Difference]: Without dead ends: 1142 [2021-03-10 22:06:33,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:06:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-03-10 22:06:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 905. [2021-03-10 22:06:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 3.4889380530973453) internal successors, (3154), 904 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 3154 transitions. [2021-03-10 22:06:33,796 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 3154 transitions. Word has length 20 [2021-03-10 22:06:33,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:33,796 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 3154 transitions. [2021-03-10 22:06:33,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 3154 transitions. [2021-03-10 22:06:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:33,797 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:33,797 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:33,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3907 [2021-03-10 22:06:33,998 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:33,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1891461938, now seen corresponding path program 292 times [2021-03-10 22:06:33,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:33,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144354826] [2021-03-10 22:06:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:34,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144354826] [2021-03-10 22:06:34,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910787998] [2021-03-10 22:06:34,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:34,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:34,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:34,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:34,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:34,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779165519] [2021-03-10 22:06:34,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:34,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:34,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:34,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:34,289 INFO L87 Difference]: Start difference. First operand 905 states and 3154 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:34,844 INFO L93 Difference]: Finished difference Result 1177 states and 3864 transitions. [2021-03-10 22:06:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:34,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:34,846 INFO L225 Difference]: With dead ends: 1177 [2021-03-10 22:06:34,846 INFO L226 Difference]: Without dead ends: 1177 [2021-03-10 22:06:34,846 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 522.8ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:06:34,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-03-10 22:06:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 898. [2021-03-10 22:06:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4782608695652173) internal successors, (3120), 897 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3120 transitions. [2021-03-10 22:06:34,855 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3120 transitions. Word has length 20 [2021-03-10 22:06:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:34,855 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3120 transitions. [2021-03-10 22:06:34,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3120 transitions. [2021-03-10 22:06:34,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:34,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:34,856 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:35,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3919 [2021-03-10 22:06:35,057 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1678115038, now seen corresponding path program 293 times [2021-03-10 22:06:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:35,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685677079] [2021-03-10 22:06:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:35,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685677079] [2021-03-10 22:06:35,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529470171] [2021-03-10 22:06:35,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:35,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:35,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:35,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:35,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:35,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:35,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207039856] [2021-03-10 22:06:35,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:35,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:35,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:35,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:35,378 INFO L87 Difference]: Start difference. First operand 898 states and 3120 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:35,974 INFO L93 Difference]: Finished difference Result 1140 states and 3771 transitions. [2021-03-10 22:06:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:35,976 INFO L225 Difference]: With dead ends: 1140 [2021-03-10 22:06:35,976 INFO L226 Difference]: Without dead ends: 1140 [2021-03-10 22:06:35,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 540.2ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-03-10 22:06:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 895. [2021-03-10 22:06:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4731543624161074) internal successors, (3105), 894 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3105 transitions. [2021-03-10 22:06:35,986 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3105 transitions. Word has length 20 [2021-03-10 22:06:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:35,986 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3105 transitions. [2021-03-10 22:06:35,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3105 transitions. [2021-03-10 22:06:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:35,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:35,987 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:36,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3927 [2021-03-10 22:06:36,187 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1345246386, now seen corresponding path program 294 times [2021-03-10 22:06:36,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:36,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580006149] [2021-03-10 22:06:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:36,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580006149] [2021-03-10 22:06:36,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989384209] [2021-03-10 22:06:36,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:36,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:36,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:36,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:36,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:36,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:36,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115520873] [2021-03-10 22:06:36,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:36,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:36,480 INFO L87 Difference]: Start difference. First operand 895 states and 3105 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:37,040 INFO L93 Difference]: Finished difference Result 1171 states and 3812 transitions. [2021-03-10 22:06:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:06:37,041 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:37,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:37,042 INFO L225 Difference]: With dead ends: 1171 [2021-03-10 22:06:37,042 INFO L226 Difference]: Without dead ends: 1165 [2021-03-10 22:06:37,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:37,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-03-10 22:06:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 905. [2021-03-10 22:06:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 3.4646017699115044) internal successors, (3132), 904 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 3132 transitions. [2021-03-10 22:06:37,052 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 3132 transitions. Word has length 20 [2021-03-10 22:06:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:37,052 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 3132 transitions. [2021-03-10 22:06:37,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 3132 transitions. [2021-03-10 22:06:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:37,053 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:37,053 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:37,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3934,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:37,254 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:37,254 INFO L82 PathProgramCache]: Analyzing trace with hash -570177540, now seen corresponding path program 295 times [2021-03-10 22:06:37,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:37,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142618128] [2021-03-10 22:06:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:37,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142618128] [2021-03-10 22:06:37,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580964837] [2021-03-10 22:06:37,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:37,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:37,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:37,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:37,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:37,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586390213] [2021-03-10 22:06:37,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:37,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:37,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:37,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:37,536 INFO L87 Difference]: Start difference. First operand 905 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:38,117 INFO L93 Difference]: Finished difference Result 1089 states and 3634 transitions. [2021-03-10 22:06:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:38,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:38,119 INFO L225 Difference]: With dead ends: 1089 [2021-03-10 22:06:38,119 INFO L226 Difference]: Without dead ends: 1089 [2021-03-10 22:06:38,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 538.4ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:06:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-03-10 22:06:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 895. [2021-03-10 22:06:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4731543624161074) internal successors, (3105), 894 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3105 transitions. [2021-03-10 22:06:38,129 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3105 transitions. Word has length 20 [2021-03-10 22:06:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:38,129 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3105 transitions. [2021-03-10 22:06:38,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3105 transitions. [2021-03-10 22:06:38,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:38,130 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:38,130 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:38,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3942 [2021-03-10 22:06:38,330 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:38,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1840840734, now seen corresponding path program 296 times [2021-03-10 22:06:38,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:38,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794078157] [2021-03-10 22:06:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:38,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794078157] [2021-03-10 22:06:38,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014383411] [2021-03-10 22:06:38,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:38,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:38,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:38,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:38,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:38,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:38,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:38,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441358471] [2021-03-10 22:06:38,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:38,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:38,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:38,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:38,643 INFO L87 Difference]: Start difference. First operand 895 states and 3105 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:39,373 INFO L93 Difference]: Finished difference Result 1111 states and 3662 transitions. [2021-03-10 22:06:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:06:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:39,376 INFO L225 Difference]: With dead ends: 1111 [2021-03-10 22:06:39,376 INFO L226 Difference]: Without dead ends: 1111 [2021-03-10 22:06:39,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 688.4ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:06:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-03-10 22:06:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 892. [2021-03-10 22:06:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4691358024691357) internal successors, (3091), 891 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3091 transitions. [2021-03-10 22:06:39,385 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3091 transitions. Word has length 20 [2021-03-10 22:06:39,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:39,385 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3091 transitions. [2021-03-10 22:06:39,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:39,385 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3091 transitions. [2021-03-10 22:06:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:39,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:39,386 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:39,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3949 [2021-03-10 22:06:39,587 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash -829788794, now seen corresponding path program 297 times [2021-03-10 22:06:39,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:39,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641374983] [2021-03-10 22:06:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:39,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641374983] [2021-03-10 22:06:39,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420864913] [2021-03-10 22:06:39,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:39,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:39,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:39,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:39,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:39,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:39,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954997102] [2021-03-10 22:06:39,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:39,887 INFO L87 Difference]: Start difference. First operand 892 states and 3091 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:40,651 INFO L93 Difference]: Finished difference Result 1075 states and 3575 transitions. [2021-03-10 22:06:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:06:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:40,653 INFO L225 Difference]: With dead ends: 1075 [2021-03-10 22:06:40,653 INFO L226 Difference]: Without dead ends: 1075 [2021-03-10 22:06:40,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 682.1ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:06:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-03-10 22:06:40,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 887. [2021-03-10 22:06:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.4582392776523703) internal successors, (3064), 886 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3064 transitions. [2021-03-10 22:06:40,664 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3064 transitions. Word has length 20 [2021-03-10 22:06:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:40,664 INFO L480 AbstractCegarLoop]: Abstraction has 887 states and 3064 transitions. [2021-03-10 22:06:40,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3064 transitions. [2021-03-10 22:06:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:40,665 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:40,665 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:40,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3957 [2021-03-10 22:06:40,883 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:40,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1527138070, now seen corresponding path program 298 times [2021-03-10 22:06:40,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:40,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237713512] [2021-03-10 22:06:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:40,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237713512] [2021-03-10 22:06:40,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57790942] [2021-03-10 22:06:40,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:41,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:41,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:41,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:41,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:41,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:41,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917088033] [2021-03-10 22:06:41,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:41,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:41,191 INFO L87 Difference]: Start difference. First operand 887 states and 3064 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:41,838 INFO L93 Difference]: Finished difference Result 1125 states and 3657 transitions. [2021-03-10 22:06:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:06:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:41,840 INFO L225 Difference]: With dead ends: 1125 [2021-03-10 22:06:41,840 INFO L226 Difference]: Without dead ends: 1125 [2021-03-10 22:06:41,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 644.5ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-03-10 22:06:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 878. [2021-03-10 22:06:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.4561003420752567) internal successors, (3031), 877 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 3031 transitions. [2021-03-10 22:06:41,850 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 3031 transitions. Word has length 20 [2021-03-10 22:06:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:41,856 INFO L480 AbstractCegarLoop]: Abstraction has 878 states and 3031 transitions. [2021-03-10 22:06:41,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 3031 transitions. [2021-03-10 22:06:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:41,857 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:41,857 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:42,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3967 [2021-03-10 22:06:42,058 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash -733973410, now seen corresponding path program 299 times [2021-03-10 22:06:42,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:42,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033887165] [2021-03-10 22:06:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:42,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033887165] [2021-03-10 22:06:42,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205988706] [2021-03-10 22:06:42,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:42,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:42,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:42,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:42,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:42,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:42,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:42,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227078236] [2021-03-10 22:06:42,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:42,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:42,350 INFO L87 Difference]: Start difference. First operand 878 states and 3031 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:43,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:43,453 INFO L93 Difference]: Finished difference Result 1334 states and 4160 transitions. [2021-03-10 22:06:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:06:43,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:43,455 INFO L225 Difference]: With dead ends: 1334 [2021-03-10 22:06:43,455 INFO L226 Difference]: Without dead ends: 1334 [2021-03-10 22:06:43,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 989.0ms TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:06:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-03-10 22:06:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 888. [2021-03-10 22:06:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.464487034949267) internal successors, (3073), 887 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3073 transitions. [2021-03-10 22:06:43,467 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3073 transitions. Word has length 20 [2021-03-10 22:06:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:43,467 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3073 transitions. [2021-03-10 22:06:43,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3073 transitions. [2021-03-10 22:06:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:43,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:43,468 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:43,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:43,668 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1244825002, now seen corresponding path program 300 times [2021-03-10 22:06:43,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:43,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552621572] [2021-03-10 22:06:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:43,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552621572] [2021-03-10 22:06:43,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132296404] [2021-03-10 22:06:43,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:43,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:06:43,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:44,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:44,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:44,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574896160] [2021-03-10 22:06:44,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:44,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:44,017 INFO L87 Difference]: Start difference. First operand 888 states and 3073 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:44,782 INFO L93 Difference]: Finished difference Result 1102 states and 3616 transitions. [2021-03-10 22:06:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:06:44,782 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:44,784 INFO L225 Difference]: With dead ends: 1102 [2021-03-10 22:06:44,784 INFO L226 Difference]: Without dead ends: 1090 [2021-03-10 22:06:44,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 777.6ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-03-10 22:06:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 888. [2021-03-10 22:06:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4611048478015785) internal successors, (3070), 887 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3070 transitions. [2021-03-10 22:06:44,794 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3070 transitions. Word has length 20 [2021-03-10 22:06:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:44,794 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3070 transitions. [2021-03-10 22:06:44,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3070 transitions. [2021-03-10 22:06:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:44,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:44,795 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:44,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:44,995 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1414823126, now seen corresponding path program 301 times [2021-03-10 22:06:44,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:44,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105501102] [2021-03-10 22:06:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:45,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105501102] [2021-03-10 22:06:45,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556914207] [2021-03-10 22:06:45,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:45,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:45,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:45,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:45,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:45,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376226988] [2021-03-10 22:06:45,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:45,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:45,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:45,291 INFO L87 Difference]: Start difference. First operand 888 states and 3070 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:45,868 INFO L93 Difference]: Finished difference Result 1156 states and 3766 transitions. [2021-03-10 22:06:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:45,869 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:45,870 INFO L225 Difference]: With dead ends: 1156 [2021-03-10 22:06:45,870 INFO L226 Difference]: Without dead ends: 1156 [2021-03-10 22:06:45,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-03-10 22:06:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 885. [2021-03-10 22:06:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.4638009049773757) internal successors, (3062), 884 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3062 transitions. [2021-03-10 22:06:45,880 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3062 transitions. Word has length 20 [2021-03-10 22:06:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:45,880 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 3062 transitions. [2021-03-10 22:06:45,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3062 transitions. [2021-03-10 22:06:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:45,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:45,881 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:46,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-03-10 22:06:46,082 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:46,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1769925290, now seen corresponding path program 302 times [2021-03-10 22:06:46,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:46,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843206714] [2021-03-10 22:06:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:46,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843206714] [2021-03-10 22:06:46,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106419191] [2021-03-10 22:06:46,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:46,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:46,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:46,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:46,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:46,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340063598] [2021-03-10 22:06:46,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:46,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:46,373 INFO L87 Difference]: Start difference. First operand 885 states and 3062 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:47,011 INFO L93 Difference]: Finished difference Result 1293 states and 4085 transitions. [2021-03-10 22:06:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:47,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:47,014 INFO L225 Difference]: With dead ends: 1293 [2021-03-10 22:06:47,014 INFO L226 Difference]: Without dead ends: 1286 [2021-03-10 22:06:47,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 565.1ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:06:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-03-10 22:06:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 899. [2021-03-10 22:06:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.461024498886414) internal successors, (3108), 898 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3108 transitions. [2021-03-10 22:06:47,025 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3108 transitions. Word has length 20 [2021-03-10 22:06:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:47,025 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3108 transitions. [2021-03-10 22:06:47,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3108 transitions. [2021-03-10 22:06:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:47,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:47,026 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:47,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:47,227 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:47,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:47,227 INFO L82 PathProgramCache]: Analyzing trace with hash -275513052, now seen corresponding path program 303 times [2021-03-10 22:06:47,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:47,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986768286] [2021-03-10 22:06:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:47,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986768286] [2021-03-10 22:06:47,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434946877] [2021-03-10 22:06:47,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:47,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:47,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:47,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:47,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:47,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:47,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:47,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937772618] [2021-03-10 22:06:47,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:47,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:47,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:47,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:47,543 INFO L87 Difference]: Start difference. First operand 899 states and 3108 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:48,350 INFO L93 Difference]: Finished difference Result 1232 states and 3948 transitions. [2021-03-10 22:06:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:48,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:48,352 INFO L225 Difference]: With dead ends: 1232 [2021-03-10 22:06:48,352 INFO L226 Difference]: Without dead ends: 1232 [2021-03-10 22:06:48,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 748.4ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:06:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-03-10 22:06:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 903. [2021-03-10 22:06:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.467849223946785) internal successors, (3128), 902 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3128 transitions. [2021-03-10 22:06:48,362 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3128 transitions. Word has length 20 [2021-03-10 22:06:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:48,363 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 3128 transitions. [2021-03-10 22:06:48,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3128 transitions. [2021-03-10 22:06:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:48,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:48,364 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:48,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:48,571 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:48,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1769420774, now seen corresponding path program 304 times [2021-03-10 22:06:48,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:48,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366302901] [2021-03-10 22:06:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:48,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366302901] [2021-03-10 22:06:48,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217514033] [2021-03-10 22:06:48,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:48,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:48,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:48,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:48,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:48,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173795029] [2021-03-10 22:06:48,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:48,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:48,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:48,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:48,876 INFO L87 Difference]: Start difference. First operand 903 states and 3128 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:49,797 INFO L93 Difference]: Finished difference Result 1280 states and 4048 transitions. [2021-03-10 22:06:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:49,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:49,799 INFO L225 Difference]: With dead ends: 1280 [2021-03-10 22:06:49,799 INFO L226 Difference]: Without dead ends: 1274 [2021-03-10 22:06:49,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:06:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-03-10 22:06:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 909. [2021-03-10 22:06:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 3.4559471365638768) internal successors, (3138), 908 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 3138 transitions. [2021-03-10 22:06:49,810 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 3138 transitions. Word has length 20 [2021-03-10 22:06:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:49,811 INFO L480 AbstractCegarLoop]: Abstraction has 909 states and 3138 transitions. [2021-03-10 22:06:49,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 3138 transitions. [2021-03-10 22:06:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:49,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:49,812 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:50,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4017 [2021-03-10 22:06:50,012 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1084603688, now seen corresponding path program 305 times [2021-03-10 22:06:50,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:50,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997669259] [2021-03-10 22:06:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:50,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997669259] [2021-03-10 22:06:50,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661793435] [2021-03-10 22:06:50,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:50,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:50,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:50,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:50,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:50,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:50,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:50,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342068344] [2021-03-10 22:06:50,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:50,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:50,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:50,291 INFO L87 Difference]: Start difference. First operand 909 states and 3138 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:51,209 INFO L93 Difference]: Finished difference Result 1331 states and 4169 transitions. [2021-03-10 22:06:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:06:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:51,211 INFO L225 Difference]: With dead ends: 1331 [2021-03-10 22:06:51,211 INFO L226 Difference]: Without dead ends: 1331 [2021-03-10 22:06:51,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 811.3ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:06:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-03-10 22:06:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 906. [2021-03-10 22:06:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.458563535911602) internal successors, (3130), 905 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3130 transitions. [2021-03-10 22:06:51,223 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3130 transitions. Word has length 20 [2021-03-10 22:06:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:51,223 INFO L480 AbstractCegarLoop]: Abstraction has 906 states and 3130 transitions. [2021-03-10 22:06:51,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3130 transitions. [2021-03-10 22:06:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:51,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:51,224 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:51,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:51,424 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:51,424 INFO L82 PathProgramCache]: Analyzing trace with hash -587159210, now seen corresponding path program 306 times [2021-03-10 22:06:51,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:51,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631193898] [2021-03-10 22:06:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:51,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631193898] [2021-03-10 22:06:51,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916864586] [2021-03-10 22:06:51,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:51,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:51,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:51,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:51,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:51,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:51,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208226279] [2021-03-10 22:06:51,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:51,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:51,744 INFO L87 Difference]: Start difference. First operand 906 states and 3130 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:52,639 INFO L93 Difference]: Finished difference Result 1212 states and 3897 transitions. [2021-03-10 22:06:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:06:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:52,641 INFO L225 Difference]: With dead ends: 1212 [2021-03-10 22:06:52,641 INFO L226 Difference]: Without dead ends: 1212 [2021-03-10 22:06:52,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 824.3ms TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:06:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-03-10 22:06:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 908. [2021-03-10 22:06:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.4608599779492835) internal successors, (3139), 907 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 3139 transitions. [2021-03-10 22:06:52,653 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 3139 transitions. Word has length 20 [2021-03-10 22:06:52,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:52,653 INFO L480 AbstractCegarLoop]: Abstraction has 908 states and 3139 transitions. [2021-03-10 22:06:52,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:52,653 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 3139 transitions. [2021-03-10 22:06:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:52,654 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:52,654 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:52,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-03-10 22:06:52,854 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash 475887386, now seen corresponding path program 307 times [2021-03-10 22:06:52,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:52,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309063162] [2021-03-10 22:06:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:52,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309063162] [2021-03-10 22:06:52,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361826468] [2021-03-10 22:06:52,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:52,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:52,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:53,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:53,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:53,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893676306] [2021-03-10 22:06:53,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:53,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:53,179 INFO L87 Difference]: Start difference. First operand 908 states and 3139 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:53,710 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 22:06:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:53,939 INFO L93 Difference]: Finished difference Result 1147 states and 3747 transitions. [2021-03-10 22:06:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:53,940 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:53,941 INFO L225 Difference]: With dead ends: 1147 [2021-03-10 22:06:53,941 INFO L226 Difference]: Without dead ends: 1147 [2021-03-10 22:06:53,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 673.7ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-03-10 22:06:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 901. [2021-03-10 22:06:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4677777777777776) internal successors, (3121), 900 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3121 transitions. [2021-03-10 22:06:53,951 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3121 transitions. Word has length 20 [2021-03-10 22:06:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:53,951 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 3121 transitions. [2021-03-10 22:06:53,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3121 transitions. [2021-03-10 22:06:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:53,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:53,952 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:54,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:54,153 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:54,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1768229786, now seen corresponding path program 308 times [2021-03-10 22:06:54,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:54,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133892421] [2021-03-10 22:06:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:54,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133892421] [2021-03-10 22:06:54,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483138647] [2021-03-10 22:06:54,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:54,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:54,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:54,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:54,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:54,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:54,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:54,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330540976] [2021-03-10 22:06:54,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:54,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:54,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:54,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:54,539 INFO L87 Difference]: Start difference. First operand 901 states and 3121 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:55,101 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:06:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:55,315 INFO L93 Difference]: Finished difference Result 1110 states and 3665 transitions. [2021-03-10 22:06:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:55,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:55,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:55,317 INFO L225 Difference]: With dead ends: 1110 [2021-03-10 22:06:55,317 INFO L226 Difference]: Without dead ends: 1110 [2021-03-10 22:06:55,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 723.9ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:06:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-03-10 22:06:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 898. [2021-03-10 22:06:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4626532887402455) internal successors, (3106), 897 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3106 transitions. [2021-03-10 22:06:55,327 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3106 transitions. Word has length 20 [2021-03-10 22:06:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:55,327 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3106 transitions. [2021-03-10 22:06:55,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3106 transitions. [2021-03-10 22:06:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:55,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:55,328 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:55,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:55,529 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:55,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash 496623914, now seen corresponding path program 309 times [2021-03-10 22:06:55,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:55,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313710433] [2021-03-10 22:06:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:55,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313710433] [2021-03-10 22:06:55,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49741537] [2021-03-10 22:06:55,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:55,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:06:55,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:55,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:55,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:55,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:55,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064630444] [2021-03-10 22:06:55,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:55,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:55,873 INFO L87 Difference]: Start difference. First operand 898 states and 3106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:56,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:56,838 INFO L93 Difference]: Finished difference Result 1206 states and 3880 transitions. [2021-03-10 22:06:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:06:56,839 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:56,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:56,840 INFO L225 Difference]: With dead ends: 1206 [2021-03-10 22:06:56,840 INFO L226 Difference]: Without dead ends: 1200 [2021-03-10 22:06:56,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 883.6ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:06:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-03-10 22:06:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 908. [2021-03-10 22:06:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.456449834619625) internal successors, (3135), 907 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 3135 transitions. [2021-03-10 22:06:56,851 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 3135 transitions. Word has length 20 [2021-03-10 22:06:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:56,851 INFO L480 AbstractCegarLoop]: Abstraction has 908 states and 3135 transitions. [2021-03-10 22:06:56,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 3135 transitions. [2021-03-10 22:06:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:56,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:56,852 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:57,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4062 [2021-03-10 22:06:57,053 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1418800012, now seen corresponding path program 310 times [2021-03-10 22:06:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:57,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519562357] [2021-03-10 22:06:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:57,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519562357] [2021-03-10 22:06:57,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112125396] [2021-03-10 22:06:57,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:57,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:57,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:57,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:57,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:57,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:06:57,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316342061] [2021-03-10 22:06:57,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:57,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:57,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:57,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:57,385 INFO L87 Difference]: Start difference. First operand 908 states and 3135 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:58,247 INFO L93 Difference]: Finished difference Result 1128 states and 3710 transitions. [2021-03-10 22:06:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:58,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:58,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:58,249 INFO L225 Difference]: With dead ends: 1128 [2021-03-10 22:06:58,249 INFO L226 Difference]: Without dead ends: 1128 [2021-03-10 22:06:58,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 799.0ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:06:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-03-10 22:06:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 898. [2021-03-10 22:06:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4626532887402455) internal successors, (3106), 897 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3106 transitions. [2021-03-10 22:06:58,259 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3106 transitions. Word has length 20 [2021-03-10 22:06:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:58,259 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3106 transitions. [2021-03-10 22:06:58,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3106 transitions. [2021-03-10 22:06:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:58,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:58,260 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:58,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:58,460 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:58,460 INFO L82 PathProgramCache]: Analyzing trace with hash 992218262, now seen corresponding path program 311 times [2021-03-10 22:06:58,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:58,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285871849] [2021-03-10 22:06:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:58,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285871849] [2021-03-10 22:06:58,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45886476] [2021-03-10 22:06:58,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:58,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:58,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:58,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:58,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:58,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:58,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466382806] [2021-03-10 22:06:58,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:58,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:58,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:58,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:58,756 INFO L87 Difference]: Start difference. First operand 898 states and 3106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:59,582 INFO L93 Difference]: Finished difference Result 1218 states and 3936 transitions. [2021-03-10 22:06:59,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:59,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:59,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:59,584 INFO L225 Difference]: With dead ends: 1218 [2021-03-10 22:06:59,584 INFO L226 Difference]: Without dead ends: 1218 [2021-03-10 22:06:59,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 726.2ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:06:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-03-10 22:06:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 899. [2021-03-10 22:06:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4654788418708242) internal successors, (3112), 898 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3112 transitions. [2021-03-10 22:06:59,595 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3112 transitions. Word has length 20 [2021-03-10 22:06:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:59,595 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 3112 transitions. [2021-03-10 22:06:59,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3112 transitions. [2021-03-10 22:06:59,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:59,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:59,596 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:59,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4080 [2021-03-10 22:06:59,796 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:59,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1678411266, now seen corresponding path program 312 times [2021-03-10 22:06:59,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:59,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076522891] [2021-03-10 22:06:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:59,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076522891] [2021-03-10 22:06:59,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068975201] [2021-03-10 22:06:59,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:59,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:59,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:59,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:00,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:00,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:00,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600445503] [2021-03-10 22:07:00,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:00,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:00,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:00,097 INFO L87 Difference]: Start difference. First operand 899 states and 3112 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:00,915 INFO L93 Difference]: Finished difference Result 1182 states and 3849 transitions. [2021-03-10 22:07:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:00,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:00,917 INFO L225 Difference]: With dead ends: 1182 [2021-03-10 22:07:00,917 INFO L226 Difference]: Without dead ends: 1182 [2021-03-10 22:07:00,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:07:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-03-10 22:07:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 898. [2021-03-10 22:07:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4626532887402455) internal successors, (3106), 897 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3106 transitions. [2021-03-10 22:07:00,927 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3106 transitions. Word has length 20 [2021-03-10 22:07:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:00,927 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3106 transitions. [2021-03-10 22:07:00,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3106 transitions. [2021-03-10 22:07:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:00,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:00,928 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:01,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-03-10 22:07:01,129 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1522233702, now seen corresponding path program 313 times [2021-03-10 22:07:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:01,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020134132] [2021-03-10 22:07:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:01,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020134132] [2021-03-10 22:07:01,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872922813] [2021-03-10 22:07:01,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:01,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:01,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:01,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:01,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:01,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280976405] [2021-03-10 22:07:01,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:01,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:01,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:01,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:01,483 INFO L87 Difference]: Start difference. First operand 898 states and 3106 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:02,327 INFO L93 Difference]: Finished difference Result 1106 states and 3636 transitions. [2021-03-10 22:07:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:07:02,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:02,330 INFO L225 Difference]: With dead ends: 1106 [2021-03-10 22:07:02,330 INFO L226 Difference]: Without dead ends: 1094 [2021-03-10 22:07:02,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 777.9ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-03-10 22:07:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 900. [2021-03-10 22:07:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.4627363737486094) internal successors, (3113), 899 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3113 transitions. [2021-03-10 22:07:02,340 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3113 transitions. Word has length 20 [2021-03-10 22:07:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:02,340 INFO L480 AbstractCegarLoop]: Abstraction has 900 states and 3113 transitions. [2021-03-10 22:07:02,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3113 transitions. [2021-03-10 22:07:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:02,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:02,341 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:02,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4096,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:02,541 INFO L428 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash -770833264, now seen corresponding path program 314 times [2021-03-10 22:07:02,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:02,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708754187] [2021-03-10 22:07:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:02,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708754187] [2021-03-10 22:07:02,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497706550] [2021-03-10 22:07:02,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:02,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:02,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:02,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:02,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:02,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:02,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:02,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838593509] [2021-03-10 22:07:02,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:02,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:02,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:02,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:02,869 INFO L87 Difference]: Start difference. First operand 900 states and 3113 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:03,785 INFO L93 Difference]: Finished difference Result 1135 states and 3698 transitions. [2021-03-10 22:07:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:03,787 INFO L225 Difference]: With dead ends: 1135 [2021-03-10 22:07:03,787 INFO L226 Difference]: Without dead ends: 1129 [2021-03-10 22:07:03,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 850.8ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:07:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-03-10 22:07:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 910. [2021-03-10 22:07:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.4565456545654567) internal successors, (3142), 909 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3142 transitions. [2021-03-10 22:07:03,798 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3142 transitions. Word has length 20 [2021-03-10 22:07:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:03,798 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 3142 transitions. [2021-03-10 22:07:03,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3142 transitions. [2021-03-10 22:07:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:03,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:03,799 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:03,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:03,999 INFO L428 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1608710106, now seen corresponding path program 315 times [2021-03-10 22:07:04,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:04,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121705126] [2021-03-10 22:07:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:04,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121705126] [2021-03-10 22:07:04,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730050517] [2021-03-10 22:07:04,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:04,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:07:04,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:04,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:04,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:04,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725388861] [2021-03-10 22:07:04,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:04,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:04,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:04,381 INFO L87 Difference]: Start difference. First operand 910 states and 3142 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:04,905 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:07:05,066 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-03-10 22:07:05,231 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 22:07:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:05,351 INFO L93 Difference]: Finished difference Result 1047 states and 3505 transitions. [2021-03-10 22:07:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:05,353 INFO L225 Difference]: With dead ends: 1047 [2021-03-10 22:07:05,353 INFO L226 Difference]: Without dead ends: 1047 [2021-03-10 22:07:05,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 951.4ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:07:05,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-03-10 22:07:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 898. [2021-03-10 22:07:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4626532887402455) internal successors, (3106), 897 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3106 transitions. [2021-03-10 22:07:05,363 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3106 transitions. Word has length 20 [2021-03-10 22:07:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:05,363 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3106 transitions. [2021-03-10 22:07:05,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3106 transitions. [2021-03-10 22:07:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:05,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:05,364 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:05,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4111,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:05,564 INFO L428 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:05,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1449125080, now seen corresponding path program 316 times [2021-03-10 22:07:05,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:05,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749855330] [2021-03-10 22:07:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:05,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749855330] [2021-03-10 22:07:05,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763614082] [2021-03-10 22:07:05,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:05,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:05,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:05,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:05,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:05,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:05,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743389629] [2021-03-10 22:07:05,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:05,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:05,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:05,841 INFO L87 Difference]: Start difference. First operand 898 states and 3106 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:06,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:06,421 INFO L93 Difference]: Finished difference Result 1086 states and 3602 transitions. [2021-03-10 22:07:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:06,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:06,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:06,423 INFO L225 Difference]: With dead ends: 1086 [2021-03-10 22:07:06,423 INFO L226 Difference]: Without dead ends: 1086 [2021-03-10 22:07:06,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:07:06,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-03-10 22:07:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 894. [2021-03-10 22:07:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.460246360582307) internal successors, (3090), 893 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3090 transitions. [2021-03-10 22:07:06,433 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3090 transitions. Word has length 20 [2021-03-10 22:07:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:06,433 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 3090 transitions. [2021-03-10 22:07:06,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3090 transitions. [2021-03-10 22:07:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:06,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:06,434 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:06,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-03-10 22:07:06,634 INFO L428 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:06,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:06,635 INFO L82 PathProgramCache]: Analyzing trace with hash -697724642, now seen corresponding path program 317 times [2021-03-10 22:07:06,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:06,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316012330] [2021-03-10 22:07:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:06,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316012330] [2021-03-10 22:07:06,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540731728] [2021-03-10 22:07:06,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:06,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:06,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:06,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:06,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:06,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227005242] [2021-03-10 22:07:06,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:06,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:06,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:06,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:06,947 INFO L87 Difference]: Start difference. First operand 894 states and 3090 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:07,603 INFO L93 Difference]: Finished difference Result 1106 states and 3648 transitions. [2021-03-10 22:07:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:07,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:07,605 INFO L225 Difference]: With dead ends: 1106 [2021-03-10 22:07:07,605 INFO L226 Difference]: Without dead ends: 1106 [2021-03-10 22:07:07,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:07:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-03-10 22:07:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 884. [2021-03-10 22:07:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.466591166477916) internal successors, (3061), 883 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3061 transitions. [2021-03-10 22:07:07,615 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3061 transitions. Word has length 20 [2021-03-10 22:07:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:07,615 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 3061 transitions. [2021-03-10 22:07:07,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3061 transitions. [2021-03-10 22:07:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:07,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:07,616 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:07,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4126,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:07,816 INFO L428 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash 926613126, now seen corresponding path program 318 times [2021-03-10 22:07:07,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:07,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508308809] [2021-03-10 22:07:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:07,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508308809] [2021-03-10 22:07:07,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800120598] [2021-03-10 22:07:07,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:07,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:07,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:08,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:08,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:08,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266386273] [2021-03-10 22:07:08,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:08,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:08,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:08,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:08,140 INFO L87 Difference]: Start difference. First operand 884 states and 3061 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:08,838 INFO L93 Difference]: Finished difference Result 1064 states and 3546 transitions. [2021-03-10 22:07:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:08,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:08,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:08,840 INFO L225 Difference]: With dead ends: 1064 [2021-03-10 22:07:08,840 INFO L226 Difference]: Without dead ends: 1064 [2021-03-10 22:07:08,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 585.5ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-03-10 22:07:08,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 878. [2021-03-10 22:07:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.4561003420752567) internal successors, (3031), 877 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 3031 transitions. [2021-03-10 22:07:08,849 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 3031 transitions. Word has length 20 [2021-03-10 22:07:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:08,849 INFO L480 AbstractCegarLoop]: Abstraction has 878 states and 3031 transitions. [2021-03-10 22:07:08,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 3031 transitions. [2021-03-10 22:07:08,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:08,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:08,851 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:09,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4132 [2021-03-10 22:07:09,051 INFO L428 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:09,051 INFO L82 PathProgramCache]: Analyzing trace with hash -858859156, now seen corresponding path program 319 times [2021-03-10 22:07:09,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:09,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130948885] [2021-03-10 22:07:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:09,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130948885] [2021-03-10 22:07:09,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205562575] [2021-03-10 22:07:09,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:09,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:09,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:09,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:09,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:09,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724634000] [2021-03-10 22:07:09,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:09,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:09,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:09,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:09,373 INFO L87 Difference]: Start difference. First operand 878 states and 3031 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:09,998 INFO L93 Difference]: Finished difference Result 1243 states and 4020 transitions. [2021-03-10 22:07:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:07:09,999 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:10,000 INFO L225 Difference]: With dead ends: 1243 [2021-03-10 22:07:10,001 INFO L226 Difference]: Without dead ends: 1243 [2021-03-10 22:07:10,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-03-10 22:07:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 881. [2021-03-10 22:07:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.456818181818182) internal successors, (3042), 880 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3042 transitions. [2021-03-10 22:07:10,011 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3042 transitions. Word has length 20 [2021-03-10 22:07:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:10,011 INFO L480 AbstractCegarLoop]: Abstraction has 881 states and 3042 transitions. [2021-03-10 22:07:10,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3042 transitions. [2021-03-10 22:07:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:10,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:10,012 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:10,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:10,213 INFO L428 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash 501257584, now seen corresponding path program 320 times [2021-03-10 22:07:10,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:10,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938455133] [2021-03-10 22:07:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:10,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938455133] [2021-03-10 22:07:10,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079228072] [2021-03-10 22:07:10,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:10,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:10,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:10,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:10,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:10,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:10,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:07:10,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170003604] [2021-03-10 22:07:10,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:10,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:10,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:10,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:10,509 INFO L87 Difference]: Start difference. First operand 881 states and 3042 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:11,639 INFO L93 Difference]: Finished difference Result 1515 states and 4748 transitions. [2021-03-10 22:07:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:07:11,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:11,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:11,642 INFO L225 Difference]: With dead ends: 1515 [2021-03-10 22:07:11,642 INFO L226 Difference]: Without dead ends: 1515 [2021-03-10 22:07:11,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1049.7ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:07:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-03-10 22:07:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 894. [2021-03-10 22:07:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.4647256438969767) internal successors, (3094), 893 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3094 transitions. [2021-03-10 22:07:11,654 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3094 transitions. Word has length 20 [2021-03-10 22:07:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:11,655 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 3094 transitions. [2021-03-10 22:07:11,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3094 transitions. [2021-03-10 22:07:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:11,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:11,656 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:11,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:11,856 INFO L428 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:11,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1814911300, now seen corresponding path program 321 times [2021-03-10 22:07:11,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:11,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421317784] [2021-03-10 22:07:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:11,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421317784] [2021-03-10 22:07:11,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825290825] [2021-03-10 22:07:11,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:11,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:07:11,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:11,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:11,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:12,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:12,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:12,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122677710] [2021-03-10 22:07:12,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:12,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:12,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:12,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:12,192 INFO L87 Difference]: Start difference. First operand 894 states and 3094 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:12,900 INFO L93 Difference]: Finished difference Result 1223 states and 3989 transitions. [2021-03-10 22:07:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:07:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:12,902 INFO L225 Difference]: With dead ends: 1223 [2021-03-10 22:07:12,902 INFO L226 Difference]: Without dead ends: 1211 [2021-03-10 22:07:12,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 713.2ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-03-10 22:07:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 894. [2021-03-10 22:07:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.461366181410974) internal successors, (3091), 893 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3091 transitions. [2021-03-10 22:07:12,912 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3091 transitions. Word has length 20 [2021-03-10 22:07:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:12,912 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 3091 transitions. [2021-03-10 22:07:12,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3091 transitions. [2021-03-10 22:07:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:12,913 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:12,913 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:13,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4156 [2021-03-10 22:07:13,118 INFO L428 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1644913176, now seen corresponding path program 322 times [2021-03-10 22:07:13,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:13,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928248677] [2021-03-10 22:07:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:13,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928248677] [2021-03-10 22:07:13,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168148253] [2021-03-10 22:07:13,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:13,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:13,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:13,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:13,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:07:13,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929182580] [2021-03-10 22:07:13,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:13,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:13,392 INFO L87 Difference]: Start difference. First operand 894 states and 3091 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:14,042 INFO L93 Difference]: Finished difference Result 1409 states and 4497 transitions. [2021-03-10 22:07:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:14,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:14,044 INFO L225 Difference]: With dead ends: 1409 [2021-03-10 22:07:14,044 INFO L226 Difference]: Without dead ends: 1409 [2021-03-10 22:07:14,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 608.4ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-03-10 22:07:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 891. [2021-03-10 22:07:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4640449438202245) internal successors, (3083), 890 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3083 transitions. [2021-03-10 22:07:14,055 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3083 transitions. Word has length 20 [2021-03-10 22:07:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:14,056 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 3083 transitions. [2021-03-10 22:07:14,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3083 transitions. [2021-03-10 22:07:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:14,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:14,057 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:14,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4165 [2021-03-10 22:07:14,257 INFO L428 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:14,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1227165978, now seen corresponding path program 323 times [2021-03-10 22:07:14,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:14,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380926668] [2021-03-10 22:07:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:14,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380926668] [2021-03-10 22:07:14,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804650782] [2021-03-10 22:07:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:14,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:14,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:14,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:14,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:14,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:07:14,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021366299] [2021-03-10 22:07:14,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:14,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:14,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:14,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:14,588 INFO L87 Difference]: Start difference. First operand 891 states and 3083 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:15,322 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-10 22:07:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:15,333 INFO L93 Difference]: Finished difference Result 1255 states and 4049 transitions. [2021-03-10 22:07:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:07:15,334 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:15,335 INFO L225 Difference]: With dead ends: 1255 [2021-03-10 22:07:15,335 INFO L226 Difference]: Without dead ends: 1237 [2021-03-10 22:07:15,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 761.4ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-03-10 22:07:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 891. [2021-03-10 22:07:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.460674157303371) internal successors, (3080), 890 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3080 transitions. [2021-03-10 22:07:15,346 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3080 transitions. Word has length 20 [2021-03-10 22:07:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:15,346 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 3080 transitions. [2021-03-10 22:07:15,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3080 transitions. [2021-03-10 22:07:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:15,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:15,347 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:15,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4169,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:15,548 INFO L428 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1637361588, now seen corresponding path program 324 times [2021-03-10 22:07:15,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:15,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279208912] [2021-03-10 22:07:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279208912] [2021-03-10 22:07:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665265819] [2021-03-10 22:07:15,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:15,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:15,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:15,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:15,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:15,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:15,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:07:15,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207110088] [2021-03-10 22:07:15,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:07:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:07:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:07:15,782 INFO L87 Difference]: Start difference. First operand 891 states and 3080 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:16,260 INFO L93 Difference]: Finished difference Result 1412 states and 4520 transitions. [2021-03-10 22:07:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:16,263 INFO L225 Difference]: With dead ends: 1412 [2021-03-10 22:07:16,263 INFO L226 Difference]: Without dead ends: 1412 [2021-03-10 22:07:16,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-03-10 22:07:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 888. [2021-03-10 22:07:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4633596392333708) internal successors, (3072), 887 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3072 transitions. [2021-03-10 22:07:16,274 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3072 transitions. Word has length 20 [2021-03-10 22:07:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:16,274 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3072 transitions. [2021-03-10 22:07:16,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3072 transitions. [2021-03-10 22:07:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:16,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:16,275 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:16,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4177 [2021-03-10 22:07:16,476 INFO L428 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:16,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1540212694, now seen corresponding path program 325 times [2021-03-10 22:07:16,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:16,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614357778] [2021-03-10 22:07:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:16,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614357778] [2021-03-10 22:07:16,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383387202] [2021-03-10 22:07:16,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:16,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:16,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:16,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920248138] [2021-03-10 22:07:16,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:16,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:16,811 INFO L87 Difference]: Start difference. First operand 888 states and 3072 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:17,823 INFO L93 Difference]: Finished difference Result 1423 states and 4534 transitions. [2021-03-10 22:07:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:07:17,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:17,826 INFO L225 Difference]: With dead ends: 1423 [2021-03-10 22:07:17,826 INFO L226 Difference]: Without dead ends: 1423 [2021-03-10 22:07:17,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 934.8ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:07:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-03-10 22:07:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 889. [2021-03-10 22:07:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4695945945945947) internal successors, (3081), 888 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3081 transitions. [2021-03-10 22:07:17,838 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3081 transitions. Word has length 20 [2021-03-10 22:07:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:17,838 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 3081 transitions. [2021-03-10 22:07:17,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3081 transitions. [2021-03-10 22:07:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:17,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:17,839 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:18,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4182,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:18,040 INFO L428 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 438585718, now seen corresponding path program 326 times [2021-03-10 22:07:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:18,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539216751] [2021-03-10 22:07:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:18,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539216751] [2021-03-10 22:07:18,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206019471] [2021-03-10 22:07:18,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:18,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:18,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:18,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:18,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:18,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242242195] [2021-03-10 22:07:18,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:18,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:18,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:18,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:18,378 INFO L87 Difference]: Start difference. First operand 889 states and 3081 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:19,156 INFO L93 Difference]: Finished difference Result 1219 states and 3978 transitions. [2021-03-10 22:07:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:19,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:19,158 INFO L225 Difference]: With dead ends: 1219 [2021-03-10 22:07:19,158 INFO L226 Difference]: Without dead ends: 1207 [2021-03-10 22:07:19,159 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 786.4ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:07:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-03-10 22:07:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 889. [2021-03-10 22:07:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4662162162162162) internal successors, (3078), 888 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3078 transitions. [2021-03-10 22:07:19,169 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3078 transitions. Word has length 20 [2021-03-10 22:07:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:19,169 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 3078 transitions. [2021-03-10 22:07:19,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3078 transitions. [2021-03-10 22:07:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:19,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:19,170 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:19,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-03-10 22:07:19,371 INFO L428 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:19,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:19,371 INFO L82 PathProgramCache]: Analyzing trace with hash 608583842, now seen corresponding path program 327 times [2021-03-10 22:07:19,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:19,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594499372] [2021-03-10 22:07:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:19,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594499372] [2021-03-10 22:07:19,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418286759] [2021-03-10 22:07:19,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:19,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:07:19,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:19,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:19,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:19,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:19,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:19,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809822896] [2021-03-10 22:07:19,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:19,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:19,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:19,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:19,672 INFO L87 Difference]: Start difference. First operand 889 states and 3078 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:20,269 INFO L93 Difference]: Finished difference Result 1314 states and 4269 transitions. [2021-03-10 22:07:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:20,271 INFO L225 Difference]: With dead ends: 1314 [2021-03-10 22:07:20,271 INFO L226 Difference]: Without dead ends: 1314 [2021-03-10 22:07:20,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 572.8ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-03-10 22:07:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 883. [2021-03-10 22:07:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 3.4682539682539684) internal successors, (3059), 882 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 3059 transitions. [2021-03-10 22:07:20,282 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 3059 transitions. Word has length 20 [2021-03-10 22:07:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:20,282 INFO L480 AbstractCegarLoop]: Abstraction has 883 states and 3059 transitions. [2021-03-10 22:07:20,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 3059 transitions. [2021-03-10 22:07:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:20,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:20,283 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:20,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4196 [2021-03-10 22:07:20,484 INFO L428 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:20,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1081752336, now seen corresponding path program 328 times [2021-03-10 22:07:20,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:20,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822626804] [2021-03-10 22:07:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:20,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822626804] [2021-03-10 22:07:20,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171231556] [2021-03-10 22:07:20,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:20,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:20,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:20,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:20,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:20,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:20,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:20,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056882086] [2021-03-10 22:07:20,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:20,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:20,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:20,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:20,825 INFO L87 Difference]: Start difference. First operand 883 states and 3059 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:21,651 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 22:07:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:21,846 INFO L93 Difference]: Finished difference Result 1324 states and 4235 transitions. [2021-03-10 22:07:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:07:21,847 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:21,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:21,848 INFO L225 Difference]: With dead ends: 1324 [2021-03-10 22:07:21,848 INFO L226 Difference]: Without dead ends: 1324 [2021-03-10 22:07:21,848 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1016.3ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-03-10 22:07:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 888. [2021-03-10 22:07:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4780157835400227) internal successors, (3085), 887 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3085 transitions. [2021-03-10 22:07:21,859 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3085 transitions. Word has length 20 [2021-03-10 22:07:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:21,859 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3085 transitions. [2021-03-10 22:07:21,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3085 transitions. [2021-03-10 22:07:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:21,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:21,860 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:22,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4200 [2021-03-10 22:07:22,060 INFO L428 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:22,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1393398494, now seen corresponding path program 329 times [2021-03-10 22:07:22,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:22,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290449907] [2021-03-10 22:07:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:22,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290449907] [2021-03-10 22:07:22,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418044576] [2021-03-10 22:07:22,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:22,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:22,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:22,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:22,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:22,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496197743] [2021-03-10 22:07:22,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:22,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:22,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:22,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:22,402 INFO L87 Difference]: Start difference. First operand 888 states and 3085 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:23,322 INFO L93 Difference]: Finished difference Result 1364 states and 4396 transitions. [2021-03-10 22:07:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:07:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:23,325 INFO L225 Difference]: With dead ends: 1364 [2021-03-10 22:07:23,325 INFO L226 Difference]: Without dead ends: 1364 [2021-03-10 22:07:23,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 912.0ms TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:07:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-03-10 22:07:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 891. [2021-03-10 22:07:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4831460674157304) internal successors, (3100), 890 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3100 transitions. [2021-03-10 22:07:23,335 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3100 transitions. Word has length 20 [2021-03-10 22:07:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:23,336 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 3100 transitions. [2021-03-10 22:07:23,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3100 transitions. [2021-03-10 22:07:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:23,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:23,337 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:23,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4212,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:23,537 INFO L428 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:23,537 INFO L82 PathProgramCache]: Analyzing trace with hash -330351898, now seen corresponding path program 330 times [2021-03-10 22:07:23,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:23,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295806415] [2021-03-10 22:07:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:23,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295806415] [2021-03-10 22:07:23,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852577799] [2021-03-10 22:07:23,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:23,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:23,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:23,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:23,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:23,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:23,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168050751] [2021-03-10 22:07:23,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:23,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:23,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:23,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:23,885 INFO L87 Difference]: Start difference. First operand 891 states and 3100 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:24,357 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 22:07:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:24,669 INFO L93 Difference]: Finished difference Result 1256 states and 4083 transitions. [2021-03-10 22:07:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:07:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:24,672 INFO L225 Difference]: With dead ends: 1256 [2021-03-10 22:07:24,672 INFO L226 Difference]: Without dead ends: 1256 [2021-03-10 22:07:24,672 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 793.5ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:07:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-03-10 22:07:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 890. [2021-03-10 22:07:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.481439820022497) internal successors, (3095), 889 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3095 transitions. [2021-03-10 22:07:24,682 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3095 transitions. Word has length 20 [2021-03-10 22:07:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:24,682 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 3095 transitions. [2021-03-10 22:07:24,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3095 transitions. [2021-03-10 22:07:24,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:24,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:24,683 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:24,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4221 [2021-03-10 22:07:24,884 INFO L428 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash 961990502, now seen corresponding path program 331 times [2021-03-10 22:07:24,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:24,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596081409] [2021-03-10 22:07:24,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:24,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596081409] [2021-03-10 22:07:24,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245896914] [2021-03-10 22:07:24,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:25,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:25,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:25,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:25,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950658152] [2021-03-10 22:07:25,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:25,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:25,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:25,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:25,289 INFO L87 Difference]: Start difference. First operand 890 states and 3095 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:25,820 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:07:25,935 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 22:07:26,090 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 22:07:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:26,185 INFO L93 Difference]: Finished difference Result 1219 states and 4001 transitions. [2021-03-10 22:07:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:07:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:26,187 INFO L225 Difference]: With dead ends: 1219 [2021-03-10 22:07:26,187 INFO L226 Difference]: Without dead ends: 1219 [2021-03-10 22:07:26,188 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 921.2ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:07:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-03-10 22:07:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 887. [2021-03-10 22:07:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.476297968397291) internal successors, (3080), 886 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3080 transitions. [2021-03-10 22:07:26,198 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3080 transitions. Word has length 20 [2021-03-10 22:07:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:26,198 INFO L480 AbstractCegarLoop]: Abstraction has 887 states and 3080 transitions. [2021-03-10 22:07:26,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3080 transitions. [2021-03-10 22:07:26,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:26,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:26,199 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:26,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4229,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:26,399 INFO L428 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash -309615370, now seen corresponding path program 332 times [2021-03-10 22:07:26,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:26,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110138074] [2021-03-10 22:07:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:26,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110138074] [2021-03-10 22:07:26,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663736649] [2021-03-10 22:07:26,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:26,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:26,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:26,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:26,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:26,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:26,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562680615] [2021-03-10 22:07:26,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:26,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:26,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:26,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:26,828 INFO L87 Difference]: Start difference. First operand 887 states and 3080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:27,374 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-10 22:07:27,499 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-10 22:07:27,713 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:07:27,838 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 22:07:27,995 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 22:07:28,115 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 22:07:28,257 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 22:07:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:28,266 INFO L93 Difference]: Finished difference Result 1304 states and 4189 transitions. [2021-03-10 22:07:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:28,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:28,269 INFO L225 Difference]: With dead ends: 1304 [2021-03-10 22:07:28,269 INFO L226 Difference]: Without dead ends: 1298 [2021-03-10 22:07:28,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1460.3ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:07:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-03-10 22:07:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 897. [2021-03-10 22:07:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4676339285714284) internal successors, (3107), 896 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3107 transitions. [2021-03-10 22:07:28,280 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3107 transitions. Word has length 20 [2021-03-10 22:07:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:28,280 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3107 transitions. [2021-03-10 22:07:28,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3107 transitions. [2021-03-10 22:07:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:28,281 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:28,281 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:28,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4241 [2021-03-10 22:07:28,481 INFO L428 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2069928000, now seen corresponding path program 333 times [2021-03-10 22:07:28,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:28,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823454411] [2021-03-10 22:07:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:28,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823454411] [2021-03-10 22:07:28,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100485811] [2021-03-10 22:07:28,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:28,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:07:28,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:28,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:28,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:28,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200326408] [2021-03-10 22:07:28,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:28,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:28,851 INFO L87 Difference]: Start difference. First operand 897 states and 3107 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:29,207 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 22:07:29,458 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 22:07:29,661 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 22:07:29,774 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 22:07:29,914 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-10 22:07:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:30,002 INFO L93 Difference]: Finished difference Result 1239 states and 4051 transitions. [2021-03-10 22:07:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:07:30,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:30,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:30,004 INFO L225 Difference]: With dead ends: 1239 [2021-03-10 22:07:30,004 INFO L226 Difference]: Without dead ends: 1239 [2021-03-10 22:07:30,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1156.2ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:07:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-03-10 22:07:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 887. [2021-03-10 22:07:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.476297968397291) internal successors, (3080), 886 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3080 transitions. [2021-03-10 22:07:30,015 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3080 transitions. Word has length 20 [2021-03-10 22:07:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:30,015 INFO L480 AbstractCegarLoop]: Abstraction has 887 states and 3080 transitions. [2021-03-10 22:07:30,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3080 transitions. [2021-03-10 22:07:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:30,016 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:30,016 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:30,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4252,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:30,216 INFO L428 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:30,216 INFO L82 PathProgramCache]: Analyzing trace with hash 185978978, now seen corresponding path program 334 times [2021-03-10 22:07:30,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:30,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407905921] [2021-03-10 22:07:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:30,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407905921] [2021-03-10 22:07:30,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186522071] [2021-03-10 22:07:30,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:30,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:30,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:30,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:30,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:30,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:30,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:30,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952926702] [2021-03-10 22:07:30,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:30,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:30,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:30,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:30,547 INFO L87 Difference]: Start difference. First operand 887 states and 3080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:31,409 INFO L93 Difference]: Finished difference Result 1374 states and 4450 transitions. [2021-03-10 22:07:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:31,412 INFO L225 Difference]: With dead ends: 1374 [2021-03-10 22:07:31,412 INFO L226 Difference]: Without dead ends: 1374 [2021-03-10 22:07:31,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 852.6ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:07:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-03-10 22:07:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 888. [2021-03-10 22:07:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4791431792559186) internal successors, (3086), 887 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3086 transitions. [2021-03-10 22:07:31,423 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3086 transitions. Word has length 20 [2021-03-10 22:07:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:31,423 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3086 transitions. [2021-03-10 22:07:31,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3086 transitions. [2021-03-10 22:07:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:31,424 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:31,424 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:31,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4266 [2021-03-10 22:07:31,624 INFO L428 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1810316746, now seen corresponding path program 335 times [2021-03-10 22:07:31,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:31,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018142818] [2021-03-10 22:07:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018142818] [2021-03-10 22:07:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429582590] [2021-03-10 22:07:31,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:31,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:31,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:31,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:31,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:31,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:31,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:31,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939704640] [2021-03-10 22:07:31,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:31,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:31,940 INFO L87 Difference]: Start difference. First operand 888 states and 3086 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:32,780 INFO L93 Difference]: Finished difference Result 1371 states and 4435 transitions. [2021-03-10 22:07:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:32,782 INFO L225 Difference]: With dead ends: 1371 [2021-03-10 22:07:32,782 INFO L226 Difference]: Without dead ends: 1371 [2021-03-10 22:07:32,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 798.3ms TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:07:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-03-10 22:07:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 886. [2021-03-10 22:07:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.473446327683616) internal successors, (3074), 885 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3074 transitions. [2021-03-10 22:07:32,794 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3074 transitions. Word has length 20 [2021-03-10 22:07:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:32,794 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 3074 transitions. [2021-03-10 22:07:32,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3074 transitions. [2021-03-10 22:07:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:32,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:32,795 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:32,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4274 [2021-03-10 22:07:32,995 INFO L428 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:32,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1966494310, now seen corresponding path program 336 times [2021-03-10 22:07:32,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:32,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871997757] [2021-03-10 22:07:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:33,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871997757] [2021-03-10 22:07:33,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004844574] [2021-03-10 22:07:33,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:33,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:07:33,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:33,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:33,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:33,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492242892] [2021-03-10 22:07:33,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:33,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:33,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:33,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:33,353 INFO L87 Difference]: Start difference. First operand 886 states and 3074 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:34,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:34,232 INFO L93 Difference]: Finished difference Result 1214 states and 3966 transitions. [2021-03-10 22:07:34,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:07:34,233 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:34,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:34,234 INFO L225 Difference]: With dead ends: 1214 [2021-03-10 22:07:34,234 INFO L226 Difference]: Without dead ends: 1202 [2021-03-10 22:07:34,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 907.8ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-03-10 22:07:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 888. [2021-03-10 22:07:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4735062006764372) internal successors, (3081), 887 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3081 transitions. [2021-03-10 22:07:34,245 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3081 transitions. Word has length 20 [2021-03-10 22:07:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:34,245 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3081 transitions. [2021-03-10 22:07:34,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3081 transitions. [2021-03-10 22:07:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:34,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:34,246 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:34,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4283,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:34,446 INFO L428 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1577072548, now seen corresponding path program 337 times [2021-03-10 22:07:34,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:34,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321903056] [2021-03-10 22:07:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:34,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321903056] [2021-03-10 22:07:34,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59137263] [2021-03-10 22:07:34,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:34,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:34,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:34,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:34,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:34,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205350613] [2021-03-10 22:07:34,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:34,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:34,847 INFO L87 Difference]: Start difference. First operand 888 states and 3081 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:35,512 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-03-10 22:07:35,664 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:07:36,077 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:07:36,199 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:07:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:36,217 INFO L93 Difference]: Finished difference Result 1241 states and 4019 transitions. [2021-03-10 22:07:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:36,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:36,219 INFO L225 Difference]: With dead ends: 1241 [2021-03-10 22:07:36,219 INFO L226 Difference]: Without dead ends: 1235 [2021-03-10 22:07:36,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1372.9ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:07:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-03-10 22:07:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 898. [2021-03-10 22:07:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.46711259754738) internal successors, (3110), 897 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3110 transitions. [2021-03-10 22:07:36,234 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3110 transitions. Word has length 20 [2021-03-10 22:07:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:36,234 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3110 transitions. [2021-03-10 22:07:36,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3110 transitions. [2021-03-10 22:07:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:36,235 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:36,235 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:36,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4290 [2021-03-10 22:07:36,436 INFO L428 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:36,436 INFO L82 PathProgramCache]: Analyzing trace with hash 802470822, now seen corresponding path program 338 times [2021-03-10 22:07:36,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:36,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668228494] [2021-03-10 22:07:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:36,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668228494] [2021-03-10 22:07:36,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128954214] [2021-03-10 22:07:36,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:36,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:36,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:36,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:36,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:36,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:36,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287603084] [2021-03-10 22:07:36,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:36,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:36,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:36,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:36,809 INFO L87 Difference]: Start difference. First operand 898 states and 3110 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:37,806 INFO L93 Difference]: Finished difference Result 1170 states and 3866 transitions. [2021-03-10 22:07:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:37,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:37,809 INFO L225 Difference]: With dead ends: 1170 [2021-03-10 22:07:37,809 INFO L226 Difference]: Without dead ends: 1170 [2021-03-10 22:07:37,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 990.2ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:07:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-03-10 22:07:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 886. [2021-03-10 22:07:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.473446327683616) internal successors, (3074), 885 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3074 transitions. [2021-03-10 22:07:37,819 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3074 transitions. Word has length 20 [2021-03-10 22:07:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:37,819 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 3074 transitions. [2021-03-10 22:07:37,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3074 transitions. [2021-03-10 22:07:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:37,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:37,820 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:38,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4300,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:38,020 INFO L428 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:38,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2039602932, now seen corresponding path program 339 times [2021-03-10 22:07:38,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:38,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50848466] [2021-03-10 22:07:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:38,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50848466] [2021-03-10 22:07:38,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894622781] [2021-03-10 22:07:38,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:38,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:07:38,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:38,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:38,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:38,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:38,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223724065] [2021-03-10 22:07:38,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:38,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:38,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:38,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:38,315 INFO L87 Difference]: Start difference. First operand 886 states and 3074 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:38,874 INFO L93 Difference]: Finished difference Result 1249 states and 4129 transitions. [2021-03-10 22:07:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:38,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:38,877 INFO L225 Difference]: With dead ends: 1249 [2021-03-10 22:07:38,877 INFO L226 Difference]: Without dead ends: 1249 [2021-03-10 22:07:38,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 558.9ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-03-10 22:07:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 889. [2021-03-10 22:07:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4786036036036037) internal successors, (3089), 888 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3089 transitions. [2021-03-10 22:07:38,887 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3089 transitions. Word has length 20 [2021-03-10 22:07:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:38,887 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 3089 transitions. [2021-03-10 22:07:38,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3089 transitions. [2021-03-10 22:07:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:38,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:38,888 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:39,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4308 [2021-03-10 22:07:39,089 INFO L428 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:39,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:39,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1503963926, now seen corresponding path program 340 times [2021-03-10 22:07:39,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:39,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678388329] [2021-03-10 22:07:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:39,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678388329] [2021-03-10 22:07:39,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584324923] [2021-03-10 22:07:39,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:39,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:39,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:39,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:39,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:39,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560544880] [2021-03-10 22:07:39,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:39,430 INFO L87 Difference]: Start difference. First operand 889 states and 3089 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:40,108 INFO L93 Difference]: Finished difference Result 1282 states and 4219 transitions. [2021-03-10 22:07:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:40,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:40,110 INFO L225 Difference]: With dead ends: 1282 [2021-03-10 22:07:40,110 INFO L226 Difference]: Without dead ends: 1282 [2021-03-10 22:07:40,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 677.1ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-03-10 22:07:40,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 890. [2021-03-10 22:07:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.481439820022497) internal successors, (3095), 889 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3095 transitions. [2021-03-10 22:07:40,121 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3095 transitions. Word has length 20 [2021-03-10 22:07:40,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:40,121 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 3095 transitions. [2021-03-10 22:07:40,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3095 transitions. [2021-03-10 22:07:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:40,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:40,122 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:40,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4313,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:40,322 INFO L428 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:40,322 INFO L82 PathProgramCache]: Analyzing trace with hash 120373842, now seen corresponding path program 341 times [2021-03-10 22:07:40,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:40,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258782145] [2021-03-10 22:07:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:40,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258782145] [2021-03-10 22:07:40,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927215929] [2021-03-10 22:07:40,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:40,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:40,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:40,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:40,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:40,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:40,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:40,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772421359] [2021-03-10 22:07:40,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:40,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:40,663 INFO L87 Difference]: Start difference. First operand 890 states and 3095 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:41,327 INFO L93 Difference]: Finished difference Result 1240 states and 4117 transitions. [2021-03-10 22:07:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:41,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:41,329 INFO L225 Difference]: With dead ends: 1240 [2021-03-10 22:07:41,329 INFO L226 Difference]: Without dead ends: 1240 [2021-03-10 22:07:41,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 661.7ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:07:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-03-10 22:07:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 886. [2021-03-10 22:07:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.473446327683616) internal successors, (3074), 885 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3074 transitions. [2021-03-10 22:07:41,340 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3074 transitions. Word has length 20 [2021-03-10 22:07:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:41,340 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 3074 transitions. [2021-03-10 22:07:41,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3074 transitions. [2021-03-10 22:07:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:41,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:41,341 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:41,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4321 [2021-03-10 22:07:41,541 INFO L428 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1106639882, now seen corresponding path program 342 times [2021-03-10 22:07:41,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:41,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924591398] [2021-03-10 22:07:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:41,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924591398] [2021-03-10 22:07:41,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104291047] [2021-03-10 22:07:41,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:41,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:07:41,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:41,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:41,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:07:41,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871713170] [2021-03-10 22:07:41,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:41,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:41,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:41,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:41,878 INFO L87 Difference]: Start difference. First operand 886 states and 3074 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:42,311 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-03-10 22:07:42,570 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-03-10 22:07:42,685 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2021-03-10 22:07:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:42,693 INFO L93 Difference]: Finished difference Result 1176 states and 3852 transitions. [2021-03-10 22:07:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:07:42,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:42,695 INFO L225 Difference]: With dead ends: 1176 [2021-03-10 22:07:42,695 INFO L226 Difference]: Without dead ends: 1158 [2021-03-10 22:07:42,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 844.3ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-03-10 22:07:42,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 888. [2021-03-10 22:07:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.471251409244645) internal successors, (3079), 887 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3079 transitions. [2021-03-10 22:07:42,705 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3079 transitions. Word has length 20 [2021-03-10 22:07:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:42,705 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3079 transitions. [2021-03-10 22:07:42,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3079 transitions. [2021-03-10 22:07:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:42,706 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:42,706 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:42,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4328 [2021-03-10 22:07:42,907 INFO L428 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:42,907 INFO L82 PathProgramCache]: Analyzing trace with hash 905716220, now seen corresponding path program 343 times [2021-03-10 22:07:42,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:42,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064376121] [2021-03-10 22:07:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:42,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064376121] [2021-03-10 22:07:42,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189086840] [2021-03-10 22:07:42,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:43,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:43,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:43,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:43,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:43,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999937776] [2021-03-10 22:07:43,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:43,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:43,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:43,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:43,216 INFO L87 Difference]: Start difference. First operand 888 states and 3079 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:43,932 INFO L93 Difference]: Finished difference Result 1170 states and 3837 transitions. [2021-03-10 22:07:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:43,934 INFO L225 Difference]: With dead ends: 1170 [2021-03-10 22:07:43,934 INFO L226 Difference]: Without dead ends: 1158 [2021-03-10 22:07:43,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 730.3ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:07:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-03-10 22:07:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 890. [2021-03-10 22:07:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4713160854893137) internal successors, (3086), 889 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3086 transitions. [2021-03-10 22:07:43,944 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3086 transitions. Word has length 20 [2021-03-10 22:07:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:43,944 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 3086 transitions. [2021-03-10 22:07:43,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3086 transitions. [2021-03-10 22:07:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:43,945 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:43,945 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:44,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4336,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:44,145 INFO L428 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:44,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:44,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1657116658, now seen corresponding path program 344 times [2021-03-10 22:07:44,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:44,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803071127] [2021-03-10 22:07:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:44,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803071127] [2021-03-10 22:07:44,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551427113] [2021-03-10 22:07:44,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:44,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:44,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:44,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:44,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:44,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011144002] [2021-03-10 22:07:44,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:44,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:44,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:44,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:44,465 INFO L87 Difference]: Start difference. First operand 890 states and 3086 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:45,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:45,417 INFO L93 Difference]: Finished difference Result 1195 states and 3889 transitions. [2021-03-10 22:07:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:07:45,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:45,420 INFO L225 Difference]: With dead ends: 1195 [2021-03-10 22:07:45,420 INFO L226 Difference]: Without dead ends: 1189 [2021-03-10 22:07:45,420 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 937.3ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:45,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-03-10 22:07:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 900. [2021-03-10 22:07:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.4627363737486094) internal successors, (3113), 899 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3113 transitions. [2021-03-10 22:07:45,430 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3113 transitions. Word has length 20 [2021-03-10 22:07:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:45,430 INFO L480 AbstractCegarLoop]: Abstraction has 900 states and 3113 transitions. [2021-03-10 22:07:45,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3113 transitions. [2021-03-10 22:07:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:45,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:45,431 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:45,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4343 [2021-03-10 22:07:45,632 INFO L428 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash -258307268, now seen corresponding path program 345 times [2021-03-10 22:07:45,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:45,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401596342] [2021-03-10 22:07:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:45,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401596342] [2021-03-10 22:07:45,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769039198] [2021-03-10 22:07:45,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:45,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:07:45,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:45,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:45,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:45,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:45,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:45,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050472924] [2021-03-10 22:07:45,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:45,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:45,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:45,965 INFO L87 Difference]: Start difference. First operand 900 states and 3113 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:46,731 INFO L93 Difference]: Finished difference Result 1137 states and 3781 transitions. [2021-03-10 22:07:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:07:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:46,733 INFO L225 Difference]: With dead ends: 1137 [2021-03-10 22:07:46,733 INFO L226 Difference]: Without dead ends: 1137 [2021-03-10 22:07:46,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:07:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-03-10 22:07:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 888. [2021-03-10 22:07:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.471251409244645) internal successors, (3079), 887 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3079 transitions. [2021-03-10 22:07:46,743 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3079 transitions. Word has length 20 [2021-03-10 22:07:46,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:46,743 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3079 transitions. [2021-03-10 22:07:46,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3079 transitions. [2021-03-10 22:07:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:46,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:46,744 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:46,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4351 [2021-03-10 22:07:46,944 INFO L428 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:46,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1245686878, now seen corresponding path program 346 times [2021-03-10 22:07:46,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:46,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239992364] [2021-03-10 22:07:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:47,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239992364] [2021-03-10 22:07:47,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128148780] [2021-03-10 22:07:47,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:47,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:47,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:47,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:47,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:07:47,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519991133] [2021-03-10 22:07:47,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:47,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:47,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:47,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:47,207 INFO L87 Difference]: Start difference. First operand 888 states and 3079 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:47,639 INFO L93 Difference]: Finished difference Result 1326 states and 4322 transitions. [2021-03-10 22:07:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:07:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:47,642 INFO L225 Difference]: With dead ends: 1326 [2021-03-10 22:07:47,642 INFO L226 Difference]: Without dead ends: 1326 [2021-03-10 22:07:47,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-03-10 22:07:47,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 887. [2021-03-10 22:07:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.4706546275395036) internal successors, (3075), 886 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3075 transitions. [2021-03-10 22:07:47,659 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3075 transitions. Word has length 20 [2021-03-10 22:07:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:47,659 INFO L480 AbstractCegarLoop]: Abstraction has 887 states and 3075 transitions. [2021-03-10 22:07:47,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3075 transitions. [2021-03-10 22:07:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:47,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:47,660 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:47,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4358,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:47,860 INFO L428 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash 766669224, now seen corresponding path program 347 times [2021-03-10 22:07:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:47,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559232678] [2021-03-10 22:07:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:47,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559232678] [2021-03-10 22:07:47,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110203537] [2021-03-10 22:07:47,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:48,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:48,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:48,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:48,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:48,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:48,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304437677] [2021-03-10 22:07:48,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:48,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:48,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:48,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:48,146 INFO L87 Difference]: Start difference. First operand 887 states and 3075 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:48,594 INFO L93 Difference]: Finished difference Result 1268 states and 4169 transitions. [2021-03-10 22:07:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:07:48,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:48,597 INFO L225 Difference]: With dead ends: 1268 [2021-03-10 22:07:48,597 INFO L226 Difference]: Without dead ends: 1268 [2021-03-10 22:07:48,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 442.8ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:07:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-03-10 22:07:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 883. [2021-03-10 22:07:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 3.4682539682539684) internal successors, (3059), 882 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 3059 transitions. [2021-03-10 22:07:48,607 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 3059 transitions. Word has length 20 [2021-03-10 22:07:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:48,607 INFO L480 AbstractCegarLoop]: Abstraction has 883 states and 3059 transitions. [2021-03-10 22:07:48,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 3059 transitions. [2021-03-10 22:07:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:48,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:48,609 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:48,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4363 [2021-03-10 22:07:48,809 INFO L428 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1518069662, now seen corresponding path program 348 times [2021-03-10 22:07:48,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:48,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154380292] [2021-03-10 22:07:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:48,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154380292] [2021-03-10 22:07:48,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299499117] [2021-03-10 22:07:48,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:48,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:48,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:49,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:49,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:49,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28964313] [2021-03-10 22:07:49,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:49,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:49,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:49,075 INFO L87 Difference]: Start difference. First operand 883 states and 3059 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:49,582 INFO L93 Difference]: Finished difference Result 1298 states and 4244 transitions. [2021-03-10 22:07:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:07:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:49,584 INFO L225 Difference]: With dead ends: 1298 [2021-03-10 22:07:49,584 INFO L226 Difference]: Without dead ends: 1298 [2021-03-10 22:07:49,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:07:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-03-10 22:07:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 883. [2021-03-10 22:07:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 3.4682539682539684) internal successors, (3059), 882 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 3059 transitions. [2021-03-10 22:07:49,595 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 3059 transitions. Word has length 20 [2021-03-10 22:07:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:49,595 INFO L480 AbstractCegarLoop]: Abstraction has 883 states and 3059 transitions. [2021-03-10 22:07:49,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 3059 transitions. [2021-03-10 22:07:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:49,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:49,596 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:49,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:49,797 INFO L428 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1152559866, now seen corresponding path program 349 times [2021-03-10 22:07:49,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:49,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961534178] [2021-03-10 22:07:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:49,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961534178] [2021-03-10 22:07:49,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624556661] [2021-03-10 22:07:49,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:49,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:49,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:50,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:50,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:07:50,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230754305] [2021-03-10 22:07:50,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:50,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:50,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:50,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:50,137 INFO L87 Difference]: Start difference. First operand 883 states and 3059 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:50,650 INFO L93 Difference]: Finished difference Result 1256 states and 4142 transitions. [2021-03-10 22:07:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:07:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:50,653 INFO L225 Difference]: With dead ends: 1256 [2021-03-10 22:07:50,653 INFO L226 Difference]: Without dead ends: 1256 [2021-03-10 22:07:50,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 522.4ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:07:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-03-10 22:07:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 877. [2021-03-10 22:07:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.4577625570776256) internal successors, (3029), 876 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3029 transitions. [2021-03-10 22:07:50,663 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3029 transitions. Word has length 20 [2021-03-10 22:07:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:50,663 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 3029 transitions. [2021-03-10 22:07:50,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3029 transitions. [2021-03-10 22:07:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:50,664 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:50,664 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:50,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4375 [2021-03-10 22:07:50,865 INFO L428 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:50,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:50,865 INFO L82 PathProgramCache]: Analyzing trace with hash 55260776, now seen corresponding path program 350 times [2021-03-10 22:07:50,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:50,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454642966] [2021-03-10 22:07:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:50,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454642966] [2021-03-10 22:07:50,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800230502] [2021-03-10 22:07:50,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:50,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:50,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:50,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:51,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:51,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:07:51,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822509107] [2021-03-10 22:07:51,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:07:51,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:51,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:07:51,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:07:51,058 INFO L87 Difference]: Start difference. First operand 877 states and 3029 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:51,308 INFO L93 Difference]: Finished difference Result 1204 states and 3917 transitions. [2021-03-10 22:07:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:51,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:51,309 INFO L225 Difference]: With dead ends: 1204 [2021-03-10 22:07:51,310 INFO L226 Difference]: Without dead ends: 1204 [2021-03-10 22:07:51,310 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-03-10 22:07:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 882. [2021-03-10 22:07:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.452894438138479) internal successors, (3042), 881 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 3042 transitions. [2021-03-10 22:07:51,320 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 3042 transitions. Word has length 20 [2021-03-10 22:07:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:51,320 INFO L480 AbstractCegarLoop]: Abstraction has 882 states and 3042 transitions. [2021-03-10 22:07:51,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 3042 transitions. [2021-03-10 22:07:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:51,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:51,321 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:51,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4382,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:51,521 INFO L428 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1613471838, now seen corresponding path program 351 times [2021-03-10 22:07:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:51,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025680428] [2021-03-10 22:07:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:51,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025680428] [2021-03-10 22:07:51,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021273938] [2021-03-10 22:07:51,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:51,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:07:51,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:51,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:51,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:51,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:51,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952867592] [2021-03-10 22:07:51,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:51,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:51,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:51,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:51,811 INFO L87 Difference]: Start difference. First operand 882 states and 3042 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:52,500 INFO L93 Difference]: Finished difference Result 1270 states and 4085 transitions. [2021-03-10 22:07:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:52,503 INFO L225 Difference]: With dead ends: 1270 [2021-03-10 22:07:52,503 INFO L226 Difference]: Without dead ends: 1270 [2021-03-10 22:07:52,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 612.4ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:07:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-03-10 22:07:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 885. [2021-03-10 22:07:52,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.4502262443438916) internal successors, (3050), 884 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3050 transitions. [2021-03-10 22:07:52,513 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3050 transitions. Word has length 20 [2021-03-10 22:07:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:52,513 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 3050 transitions. [2021-03-10 22:07:52,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3050 transitions. [2021-03-10 22:07:52,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:52,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:52,514 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:52,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4385 [2021-03-10 22:07:52,715 INFO L428 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:52,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:52,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1973137240, now seen corresponding path program 352 times [2021-03-10 22:07:52,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:52,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553912935] [2021-03-10 22:07:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553912935] [2021-03-10 22:07:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374663729] [2021-03-10 22:07:52,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:52,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:52,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:52,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:52,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:52,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:52,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:07:52,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087795619] [2021-03-10 22:07:52,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:07:52,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:07:52,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:07:52,933 INFO L87 Difference]: Start difference. First operand 885 states and 3050 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:53,692 INFO L93 Difference]: Finished difference Result 1342 states and 4277 transitions. [2021-03-10 22:07:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:07:53,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:53,694 INFO L225 Difference]: With dead ends: 1342 [2021-03-10 22:07:53,694 INFO L226 Difference]: Without dead ends: 1342 [2021-03-10 22:07:53,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:07:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-03-10 22:07:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 877. [2021-03-10 22:07:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.4577625570776256) internal successors, (3029), 876 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3029 transitions. [2021-03-10 22:07:53,705 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3029 transitions. Word has length 20 [2021-03-10 22:07:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:53,705 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 3029 transitions. [2021-03-10 22:07:53,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3029 transitions. [2021-03-10 22:07:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:53,706 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:53,706 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:53,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4387 [2021-03-10 22:07:53,906 INFO L428 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1170572698, now seen corresponding path program 353 times [2021-03-10 22:07:53,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:53,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060304978] [2021-03-10 22:07:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:53,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060304978] [2021-03-10 22:07:53,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035379949] [2021-03-10 22:07:53,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:54,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:54,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:54,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:54,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:54,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:07:54,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553841082] [2021-03-10 22:07:54,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:54,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:54,170 INFO L87 Difference]: Start difference. First operand 877 states and 3029 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:54,597 INFO L93 Difference]: Finished difference Result 1146 states and 3754 transitions. [2021-03-10 22:07:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:54,599 INFO L225 Difference]: With dead ends: 1146 [2021-03-10 22:07:54,599 INFO L226 Difference]: Without dead ends: 1146 [2021-03-10 22:07:54,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-03-10 22:07:54,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 880. [2021-03-10 22:07:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4550625711035265) internal successors, (3037), 879 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3037 transitions. [2021-03-10 22:07:54,609 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3037 transitions. Word has length 20 [2021-03-10 22:07:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:54,609 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 3037 transitions. [2021-03-10 22:07:54,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3037 transitions. [2021-03-10 22:07:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:54,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:54,610 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:54,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4392,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:54,811 INFO L428 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1878930916, now seen corresponding path program 354 times [2021-03-10 22:07:54,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:54,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620132721] [2021-03-10 22:07:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620132721] [2021-03-10 22:07:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191970180] [2021-03-10 22:07:54,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:54,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:07:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:55,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:55,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:07:55,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95308995] [2021-03-10 22:07:55,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:07:55,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:55,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:07:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:07:55,038 INFO L87 Difference]: Start difference. First operand 880 states and 3037 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:55,398 INFO L93 Difference]: Finished difference Result 1188 states and 3880 transitions. [2021-03-10 22:07:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:07:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:55,400 INFO L225 Difference]: With dead ends: 1188 [2021-03-10 22:07:55,400 INFO L226 Difference]: Without dead ends: 1188 [2021-03-10 22:07:55,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:07:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-03-10 22:07:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 877. [2021-03-10 22:07:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.4577625570776256) internal successors, (3029), 876 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3029 transitions. [2021-03-10 22:07:55,411 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3029 transitions. Word has length 20 [2021-03-10 22:07:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:55,411 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 3029 transitions. [2021-03-10 22:07:55,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3029 transitions. [2021-03-10 22:07:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:55,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:55,412 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:55,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4395 [2021-03-10 22:07:55,612 INFO L428 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:55,612 INFO L82 PathProgramCache]: Analyzing trace with hash -227853204, now seen corresponding path program 355 times [2021-03-10 22:07:55,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:55,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223096946] [2021-03-10 22:07:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:55,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223096946] [2021-03-10 22:07:55,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883258138] [2021-03-10 22:07:55,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:55,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:55,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:55,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:07:55,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690397982] [2021-03-10 22:07:55,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:07:55,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:55,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:07:55,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:07:55,853 INFO L87 Difference]: Start difference. First operand 877 states and 3029 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:56,163 INFO L93 Difference]: Finished difference Result 1171 states and 3799 transitions. [2021-03-10 22:07:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:56,165 INFO L225 Difference]: With dead ends: 1171 [2021-03-10 22:07:56,165 INFO L226 Difference]: Without dead ends: 1171 [2021-03-10 22:07:56,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-03-10 22:07:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 877. [2021-03-10 22:07:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.4577625570776256) internal successors, (3029), 876 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3029 transitions. [2021-03-10 22:07:56,175 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3029 transitions. Word has length 20 [2021-03-10 22:07:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:56,175 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 3029 transitions. [2021-03-10 22:07:56,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3029 transitions. [2021-03-10 22:07:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:56,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:56,176 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:56,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4400,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:56,376 INFO L428 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1183905348, now seen corresponding path program 356 times [2021-03-10 22:07:56,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:56,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674757237] [2021-03-10 22:07:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:56,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674757237] [2021-03-10 22:07:56,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431270743] [2021-03-10 22:07:56,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:56,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:56,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:56,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:56,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:07:56,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647210220] [2021-03-10 22:07:56,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:07:56,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:56,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:07:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:07:56,602 INFO L87 Difference]: Start difference. First operand 877 states and 3029 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:56,970 INFO L93 Difference]: Finished difference Result 1056 states and 3523 transitions. [2021-03-10 22:07:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:56,973 INFO L225 Difference]: With dead ends: 1056 [2021-03-10 22:07:56,973 INFO L226 Difference]: Without dead ends: 1044 [2021-03-10 22:07:56,973 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-03-10 22:07:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 866. [2021-03-10 22:07:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.4647398843930635) internal successors, (2997), 865 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2997 transitions. [2021-03-10 22:07:56,982 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2997 transitions. Word has length 20 [2021-03-10 22:07:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:56,982 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 2997 transitions. [2021-03-10 22:07:56,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2997 transitions. [2021-03-10 22:07:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:56,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:56,983 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:57,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4405,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:57,187 INFO L428 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:57,187 INFO L82 PathProgramCache]: Analyzing trace with hash -343837518, now seen corresponding path program 357 times [2021-03-10 22:07:57,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:57,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236156201] [2021-03-10 22:07:57,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:57,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236156201] [2021-03-10 22:07:57,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034005665] [2021-03-10 22:07:57,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:57,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:07:57,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:57,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:57,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:57,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:57,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:07:57,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122504671] [2021-03-10 22:07:57,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:07:57,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:07:57,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:07:57,411 INFO L87 Difference]: Start difference. First operand 866 states and 2997 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:57,774 INFO L93 Difference]: Finished difference Result 1418 states and 4552 transitions. [2021-03-10 22:07:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:57,777 INFO L225 Difference]: With dead ends: 1418 [2021-03-10 22:07:57,777 INFO L226 Difference]: Without dead ends: 1418 [2021-03-10 22:07:57,777 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:07:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-03-10 22:07:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 873. [2021-03-10 22:07:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4690366972477062) internal successors, (3025), 872 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 3025 transitions. [2021-03-10 22:07:57,788 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 3025 transitions. Word has length 20 [2021-03-10 22:07:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:57,788 INFO L480 AbstractCegarLoop]: Abstraction has 873 states and 3025 transitions. [2021-03-10 22:07:57,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 3025 transitions. [2021-03-10 22:07:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:57,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:57,789 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:57,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4412,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:57,989 INFO L428 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2132234422, now seen corresponding path program 358 times [2021-03-10 22:07:57,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:57,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235722892] [2021-03-10 22:07:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:58,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235722892] [2021-03-10 22:07:58,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240950233] [2021-03-10 22:07:58,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:58,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:58,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:58,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:58,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:07:58,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97133759] [2021-03-10 22:07:58,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:58,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:58,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:58,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:58,311 INFO L87 Difference]: Start difference. First operand 873 states and 3025 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:58,731 INFO L93 Difference]: Finished difference Result 1297 states and 4203 transitions. [2021-03-10 22:07:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:07:58,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:58,733 INFO L225 Difference]: With dead ends: 1297 [2021-03-10 22:07:58,733 INFO L226 Difference]: Without dead ends: 1283 [2021-03-10 22:07:58,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:07:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-03-10 22:07:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 870. [2021-03-10 22:07:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4683544303797467) internal successors, (3014), 869 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3014 transitions. [2021-03-10 22:07:58,744 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3014 transitions. Word has length 20 [2021-03-10 22:07:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:58,744 INFO L480 AbstractCegarLoop]: Abstraction has 870 states and 3014 transitions. [2021-03-10 22:07:58,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3014 transitions. [2021-03-10 22:07:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:58,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:58,745 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:58,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4417,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:58,945 INFO L428 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1214373544, now seen corresponding path program 359 times [2021-03-10 22:07:58,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:58,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101744272] [2021-03-10 22:07:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:59,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101744272] [2021-03-10 22:07:59,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117324927] [2021-03-10 22:07:59,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:59,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:59,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:59,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:07:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:59,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:59,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:07:59,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455175285] [2021-03-10 22:07:59,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:07:59,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:07:59,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:07:59,197 INFO L87 Difference]: Start difference. First operand 870 states and 3014 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:59,834 INFO L93 Difference]: Finished difference Result 1607 states and 5006 transitions. [2021-03-10 22:07:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:07:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:59,837 INFO L225 Difference]: With dead ends: 1607 [2021-03-10 22:07:59,837 INFO L226 Difference]: Without dead ends: 1607 [2021-03-10 22:07:59,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 529.5ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:07:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-03-10 22:07:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 876. [2021-03-10 22:07:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.466285714285714) internal successors, (3033), 875 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 3033 transitions. [2021-03-10 22:07:59,849 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 3033 transitions. Word has length 20 [2021-03-10 22:07:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:59,849 INFO L480 AbstractCegarLoop]: Abstraction has 876 states and 3033 transitions. [2021-03-10 22:07:59,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 3033 transitions. [2021-03-10 22:07:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:59,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:59,850 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:00,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4427 [2021-03-10 22:08:00,050 INFO L428 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:00,051 INFO L82 PathProgramCache]: Analyzing trace with hash 428319524, now seen corresponding path program 360 times [2021-03-10 22:08:00,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:00,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852056912] [2021-03-10 22:08:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:00,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852056912] [2021-03-10 22:08:00,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572927453] [2021-03-10 22:08:00,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:00,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:08:00,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:00,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:00,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:00,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:00,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934749438] [2021-03-10 22:08:00,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:00,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:00,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:00,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:00,354 INFO L87 Difference]: Start difference. First operand 876 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:00,915 INFO L93 Difference]: Finished difference Result 1366 states and 4360 transitions. [2021-03-10 22:08:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:00,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:00,917 INFO L225 Difference]: With dead ends: 1366 [2021-03-10 22:08:00,917 INFO L226 Difference]: Without dead ends: 1359 [2021-03-10 22:08:00,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 567.5ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-03-10 22:08:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 889. [2021-03-10 22:08:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4605855855855854) internal successors, (3073), 888 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3073 transitions. [2021-03-10 22:08:00,928 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3073 transitions. Word has length 20 [2021-03-10 22:08:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:00,928 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 3073 transitions. [2021-03-10 22:08:00,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3073 transitions. [2021-03-10 22:08:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:00,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:00,929 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:01,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4432,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:01,130 INFO L428 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:01,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:01,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1922731762, now seen corresponding path program 361 times [2021-03-10 22:08:01,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:01,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434002234] [2021-03-10 22:08:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:01,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434002234] [2021-03-10 22:08:01,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941296087] [2021-03-10 22:08:01,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:01,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:01,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:01,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:01,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:01,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66859983] [2021-03-10 22:08:01,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:01,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:01,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:01,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:01,383 INFO L87 Difference]: Start difference. First operand 889 states and 3073 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:02,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:02,590 INFO L93 Difference]: Finished difference Result 1806 states and 5513 transitions. [2021-03-10 22:08:02,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:08:02,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:02,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:02,593 INFO L225 Difference]: With dead ends: 1806 [2021-03-10 22:08:02,593 INFO L226 Difference]: Without dead ends: 1806 [2021-03-10 22:08:02,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1063.9ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:08:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-03-10 22:08:02,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 892. [2021-03-10 22:08:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4646464646464645) internal successors, (3087), 891 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3087 transitions. [2021-03-10 22:08:02,607 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3087 transitions. Word has length 20 [2021-03-10 22:08:02,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:02,607 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3087 transitions. [2021-03-10 22:08:02,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:02,607 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3087 transitions. [2021-03-10 22:08:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:02,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:02,608 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:02,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4443,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:02,809 INFO L428 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash 428824040, now seen corresponding path program 362 times [2021-03-10 22:08:02,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:02,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061333867] [2021-03-10 22:08:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:02,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061333867] [2021-03-10 22:08:02,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271112906] [2021-03-10 22:08:02,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:02,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:02,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:02,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:03,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:03,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:03,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106504639] [2021-03-10 22:08:03,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:03,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:03,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:03,072 INFO L87 Difference]: Start difference. First operand 892 states and 3087 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:03,503 INFO L93 Difference]: Finished difference Result 1496 states and 4731 transitions. [2021-03-10 22:08:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:08:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:03,505 INFO L225 Difference]: With dead ends: 1496 [2021-03-10 22:08:03,505 INFO L226 Difference]: Without dead ends: 1490 [2021-03-10 22:08:03,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:08:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-03-10 22:08:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 898. [2021-03-10 22:08:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4526198439241917) internal successors, (3097), 897 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3097 transitions. [2021-03-10 22:08:03,517 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3097 transitions. Word has length 20 [2021-03-10 22:08:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:03,517 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3097 transitions. [2021-03-10 22:08:03,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3097 transitions. [2021-03-10 22:08:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:03,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:03,518 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:03,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4451 [2021-03-10 22:08:03,718 INFO L428 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:03,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:03,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1012118794, now seen corresponding path program 363 times [2021-03-10 22:08:03,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:03,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081462010] [2021-03-10 22:08:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:03,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081462010] [2021-03-10 22:08:03,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335920230] [2021-03-10 22:08:03,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:03,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:08:03,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:03,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:03,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:04,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:04,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:04,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432128863] [2021-03-10 22:08:04,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:04,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:04,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:04,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:04,045 INFO L87 Difference]: Start difference. First operand 898 states and 3097 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:04,390 INFO L93 Difference]: Finished difference Result 1338 states and 4310 transitions. [2021-03-10 22:08:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:08:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:04,393 INFO L225 Difference]: With dead ends: 1338 [2021-03-10 22:08:04,393 INFO L226 Difference]: Without dead ends: 1338 [2021-03-10 22:08:04,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 401.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-03-10 22:08:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 877. [2021-03-10 22:08:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.469178082191781) internal successors, (3039), 876 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3039 transitions. [2021-03-10 22:08:04,403 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3039 transitions. Word has length 20 [2021-03-10 22:08:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:04,403 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 3039 transitions. [2021-03-10 22:08:04,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3039 transitions. [2021-03-10 22:08:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:04,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:04,404 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:04,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4457,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:04,613 INFO L428 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:04,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:04,613 INFO L82 PathProgramCache]: Analyzing trace with hash -120644928, now seen corresponding path program 364 times [2021-03-10 22:08:04,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:04,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013011870] [2021-03-10 22:08:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:04,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013011870] [2021-03-10 22:08:04,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952442441] [2021-03-10 22:08:04,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:04,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:04,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:04,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:04,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:04,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:04,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:04,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839210110] [2021-03-10 22:08:04,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:04,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:04,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:04,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:04,882 INFO L87 Difference]: Start difference. First operand 877 states and 3039 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:05,233 INFO L93 Difference]: Finished difference Result 1258 states and 4091 transitions. [2021-03-10 22:08:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:08:05,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:05,235 INFO L225 Difference]: With dead ends: 1258 [2021-03-10 22:08:05,235 INFO L226 Difference]: Without dead ends: 1233 [2021-03-10 22:08:05,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-03-10 22:08:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 877. [2021-03-10 22:08:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.469178082191781) internal successors, (3039), 876 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3039 transitions. [2021-03-10 22:08:05,246 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3039 transitions. Word has length 20 [2021-03-10 22:08:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:05,246 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 3039 transitions. [2021-03-10 22:08:05,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3039 transitions. [2021-03-10 22:08:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:05,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:05,247 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:05,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4468,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:05,447 INFO L428 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash 197477672, now seen corresponding path program 365 times [2021-03-10 22:08:05,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:05,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307059666] [2021-03-10 22:08:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:05,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307059666] [2021-03-10 22:08:05,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645626195] [2021-03-10 22:08:05,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:05,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:05,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:05,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:05,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:05,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:05,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:05,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772966305] [2021-03-10 22:08:05,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:05,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:05,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:05,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:05,681 INFO L87 Difference]: Start difference. First operand 877 states and 3039 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:06,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:06,013 INFO L93 Difference]: Finished difference Result 1496 states and 4742 transitions. [2021-03-10 22:08:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:06,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:06,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:06,015 INFO L225 Difference]: With dead ends: 1496 [2021-03-10 22:08:06,015 INFO L226 Difference]: Without dead ends: 1496 [2021-03-10 22:08:06,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-03-10 22:08:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 864. [2021-03-10 22:08:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.472769409038239) internal successors, (2997), 863 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2997 transitions. [2021-03-10 22:08:06,027 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2997 transitions. Word has length 20 [2021-03-10 22:08:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:06,027 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 2997 transitions. [2021-03-10 22:08:06,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2997 transitions. [2021-03-10 22:08:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:06,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:06,028 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:06,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4476,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:06,228 INFO L428 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash -717536728, now seen corresponding path program 366 times [2021-03-10 22:08:06,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:06,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188382102] [2021-03-10 22:08:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:06,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188382102] [2021-03-10 22:08:06,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829296790] [2021-03-10 22:08:06,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:06,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:08:06,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:06,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:06,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:06,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:06,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:06,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364642980] [2021-03-10 22:08:06,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:06,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:06,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:06,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:06,538 INFO L87 Difference]: Start difference. First operand 864 states and 2997 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:06,896 INFO L93 Difference]: Finished difference Result 1417 states and 4543 transitions. [2021-03-10 22:08:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:06,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:06,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:06,898 INFO L225 Difference]: With dead ends: 1417 [2021-03-10 22:08:06,898 INFO L226 Difference]: Without dead ends: 1417 [2021-03-10 22:08:06,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-03-10 22:08:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 867. [2021-03-10 22:08:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.4780600461893765) internal successors, (3012), 866 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 3012 transitions. [2021-03-10 22:08:06,908 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 3012 transitions. Word has length 20 [2021-03-10 22:08:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:06,908 INFO L480 AbstractCegarLoop]: Abstraction has 867 states and 3012 transitions. [2021-03-10 22:08:06,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 3012 transitions. [2021-03-10 22:08:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:06,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:06,909 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:07,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4481,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:07,110 INFO L428 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:07,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:07,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1484382876, now seen corresponding path program 367 times [2021-03-10 22:08:07,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:07,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282936261] [2021-03-10 22:08:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:07,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282936261] [2021-03-10 22:08:07,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044794560] [2021-03-10 22:08:07,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:07,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:07,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:07,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450354251] [2021-03-10 22:08:07,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:07,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:07,381 INFO L87 Difference]: Start difference. First operand 867 states and 3012 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:07,818 INFO L93 Difference]: Finished difference Result 1449 states and 4624 transitions. [2021-03-10 22:08:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:07,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:07,821 INFO L225 Difference]: With dead ends: 1449 [2021-03-10 22:08:07,821 INFO L226 Difference]: Without dead ends: 1449 [2021-03-10 22:08:07,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-03-10 22:08:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 870. [2021-03-10 22:08:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.48331415420023) internal successors, (3027), 869 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3027 transitions. [2021-03-10 22:08:07,832 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3027 transitions. Word has length 20 [2021-03-10 22:08:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:07,832 INFO L480 AbstractCegarLoop]: Abstraction has 870 states and 3027 transitions. [2021-03-10 22:08:07,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3027 transitions. [2021-03-10 22:08:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:07,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:07,833 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:08,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4487,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:08,033 INFO L428 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:08,034 INFO L82 PathProgramCache]: Analyzing trace with hash 853447464, now seen corresponding path program 368 times [2021-03-10 22:08:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:08,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714704756] [2021-03-10 22:08:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:08,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714704756] [2021-03-10 22:08:08,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598199444] [2021-03-10 22:08:08,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:08,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:08,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:08,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:08,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:08,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:08,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:08,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037078264] [2021-03-10 22:08:08,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:08,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:08,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:08,348 INFO L87 Difference]: Start difference. First operand 870 states and 3027 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:08,713 INFO L93 Difference]: Finished difference Result 1416 states and 4547 transitions. [2021-03-10 22:08:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:08,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:08,715 INFO L225 Difference]: With dead ends: 1416 [2021-03-10 22:08:08,715 INFO L226 Difference]: Without dead ends: 1416 [2021-03-10 22:08:08,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 319.3ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-03-10 22:08:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 858. [2021-03-10 22:08:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.469078179696616) internal successors, (2973), 857 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2973 transitions. [2021-03-10 22:08:08,726 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2973 transitions. Word has length 20 [2021-03-10 22:08:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:08,726 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2973 transitions. [2021-03-10 22:08:08,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2973 transitions. [2021-03-10 22:08:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:08,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:08,727 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:08,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4494 [2021-03-10 22:08:08,928 INFO L428 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:08,928 INFO L82 PathProgramCache]: Analyzing trace with hash 43506906, now seen corresponding path program 369 times [2021-03-10 22:08:08,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:08,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575405322] [2021-03-10 22:08:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575405322] [2021-03-10 22:08:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123326494] [2021-03-10 22:08:09,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:09,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:09,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:09,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:09,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:09,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:09,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837762632] [2021-03-10 22:08:09,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:09,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:09,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:09,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:09,212 INFO L87 Difference]: Start difference. First operand 858 states and 2973 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:09,824 INFO L93 Difference]: Finished difference Result 1532 states and 4814 transitions. [2021-03-10 22:08:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:08:09,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:09,826 INFO L225 Difference]: With dead ends: 1532 [2021-03-10 22:08:09,826 INFO L226 Difference]: Without dead ends: 1532 [2021-03-10 22:08:09,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 541.6ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:08:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-03-10 22:08:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 865. [2021-03-10 22:08:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.4699074074074074) internal successors, (2998), 864 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2998 transitions. [2021-03-10 22:08:09,838 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2998 transitions. Word has length 20 [2021-03-10 22:08:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:09,838 INFO L480 AbstractCegarLoop]: Abstraction has 865 states and 2998 transitions. [2021-03-10 22:08:09,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2998 transitions. [2021-03-10 22:08:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:09,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:09,839 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:10,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4501,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:10,039 INFO L428 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:10,039 INFO L82 PathProgramCache]: Analyzing trace with hash 751865124, now seen corresponding path program 370 times [2021-03-10 22:08:10,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:10,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232817546] [2021-03-10 22:08:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232817546] [2021-03-10 22:08:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363020064] [2021-03-10 22:08:10,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:10,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:10,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:10,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:10,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:10,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:10,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:10,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816139713] [2021-03-10 22:08:10,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:10,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:10,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:10,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:10,346 INFO L87 Difference]: Start difference. First operand 865 states and 2998 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:11,348 INFO L93 Difference]: Finished difference Result 1619 states and 5047 transitions. [2021-03-10 22:08:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:08:11,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:11,351 INFO L225 Difference]: With dead ends: 1619 [2021-03-10 22:08:11,351 INFO L226 Difference]: Without dead ends: 1619 [2021-03-10 22:08:11,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 930.6ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:08:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-03-10 22:08:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 871. [2021-03-10 22:08:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.471264367816092) internal successors, (3020), 870 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3020 transitions. [2021-03-10 22:08:11,363 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3020 transitions. Word has length 20 [2021-03-10 22:08:11,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:11,363 INFO L480 AbstractCegarLoop]: Abstraction has 871 states and 3020 transitions. [2021-03-10 22:08:11,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3020 transitions. [2021-03-10 22:08:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:11,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:11,364 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:11,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4506 [2021-03-10 22:08:11,565 INFO L428 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1616033352, now seen corresponding path program 371 times [2021-03-10 22:08:11,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:11,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098535584] [2021-03-10 22:08:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:11,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098535584] [2021-03-10 22:08:11,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849804943] [2021-03-10 22:08:11,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:11,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:11,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:11,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:11,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:11,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:11,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:11,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085777776] [2021-03-10 22:08:11,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:11,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:11,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:11,915 INFO L87 Difference]: Start difference. First operand 871 states and 3020 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:12,293 INFO L93 Difference]: Finished difference Result 1287 states and 4158 transitions. [2021-03-10 22:08:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:12,295 INFO L225 Difference]: With dead ends: 1287 [2021-03-10 22:08:12,295 INFO L226 Difference]: Without dead ends: 1287 [2021-03-10 22:08:12,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-03-10 22:08:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 865. [2021-03-10 22:08:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.4768518518518516) internal successors, (3004), 864 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3004 transitions. [2021-03-10 22:08:12,305 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3004 transitions. Word has length 20 [2021-03-10 22:08:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:12,305 INFO L480 AbstractCegarLoop]: Abstraction has 865 states and 3004 transitions. [2021-03-10 22:08:12,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3004 transitions. [2021-03-10 22:08:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:12,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:12,306 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:12,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4514,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:12,507 INFO L428 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:12,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1418132912, now seen corresponding path program 372 times [2021-03-10 22:08:12,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:12,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327680111] [2021-03-10 22:08:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:12,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327680111] [2021-03-10 22:08:12,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140940265] [2021-03-10 22:08:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:12,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:08:12,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:12,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:12,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:12,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:12,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495762082] [2021-03-10 22:08:12,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:12,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:12,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:12,823 INFO L87 Difference]: Start difference. First operand 865 states and 3004 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:13,311 INFO L93 Difference]: Finished difference Result 1252 states and 4064 transitions. [2021-03-10 22:08:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:13,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:13,314 INFO L225 Difference]: With dead ends: 1252 [2021-03-10 22:08:13,314 INFO L226 Difference]: Without dead ends: 1238 [2021-03-10 22:08:13,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-03-10 22:08:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 865. [2021-03-10 22:08:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.4768518518518516) internal successors, (3004), 864 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3004 transitions. [2021-03-10 22:08:13,324 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3004 transitions. Word has length 20 [2021-03-10 22:08:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:13,324 INFO L480 AbstractCegarLoop]: Abstraction has 865 states and 3004 transitions. [2021-03-10 22:08:13,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3004 transitions. [2021-03-10 22:08:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:13,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:13,325 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:13,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4521,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:13,526 INFO L428 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:13,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1862084004, now seen corresponding path program 373 times [2021-03-10 22:08:13,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:13,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600144495] [2021-03-10 22:08:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:13,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600144495] [2021-03-10 22:08:13,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705373291] [2021-03-10 22:08:13,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:13,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:13,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:13,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:13,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:13,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707144055] [2021-03-10 22:08:13,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:13,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:13,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:13,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:13,815 INFO L87 Difference]: Start difference. First operand 865 states and 3004 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:14,316 INFO L93 Difference]: Finished difference Result 1440 states and 4586 transitions. [2021-03-10 22:08:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:14,318 INFO L225 Difference]: With dead ends: 1440 [2021-03-10 22:08:14,318 INFO L226 Difference]: Without dead ends: 1440 [2021-03-10 22:08:14,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-03-10 22:08:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 861. [2021-03-10 22:08:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.474418604651163) internal successors, (2988), 860 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2988 transitions. [2021-03-10 22:08:14,330 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2988 transitions. Word has length 20 [2021-03-10 22:08:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:14,330 INFO L480 AbstractCegarLoop]: Abstraction has 861 states and 2988 transitions. [2021-03-10 22:08:14,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2988 transitions. [2021-03-10 22:08:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:14,331 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:14,331 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:14,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4528 [2021-03-10 22:08:14,546 INFO L428 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:14,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:14,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1250117212, now seen corresponding path program 374 times [2021-03-10 22:08:14,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:14,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249753811] [2021-03-10 22:08:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249753811] [2021-03-10 22:08:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198153489] [2021-03-10 22:08:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:14,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:14,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:14,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:14,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:14,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:14,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:14,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107353715] [2021-03-10 22:08:14,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:14,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:14,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:14,847 INFO L87 Difference]: Start difference. First operand 861 states and 2988 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:15,496 INFO L93 Difference]: Finished difference Result 1471 states and 4671 transitions. [2021-03-10 22:08:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:08:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:15,498 INFO L225 Difference]: With dead ends: 1471 [2021-03-10 22:08:15,499 INFO L226 Difference]: Without dead ends: 1471 [2021-03-10 22:08:15,499 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 513.2ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:08:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-03-10 22:08:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 864. [2021-03-10 22:08:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.4797219003476245) internal successors, (3003), 863 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 3003 transitions. [2021-03-10 22:08:15,510 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 3003 transitions. Word has length 20 [2021-03-10 22:08:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:15,510 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 3003 transitions. [2021-03-10 22:08:15,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 3003 transitions. [2021-03-10 22:08:15,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:15,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:15,511 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:15,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4533,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:15,711 INFO L428 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:15,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1087713128, now seen corresponding path program 375 times [2021-03-10 22:08:15,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:15,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620536402] [2021-03-10 22:08:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:15,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620536402] [2021-03-10 22:08:15,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073333514] [2021-03-10 22:08:15,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:15,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:15,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:15,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:15,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:16,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:16,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:16,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13876224] [2021-03-10 22:08:16,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:16,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:16,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:16,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:16,001 INFO L87 Difference]: Start difference. First operand 864 states and 3003 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:16,537 INFO L93 Difference]: Finished difference Result 1428 states and 4568 transitions. [2021-03-10 22:08:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:16,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:16,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:16,540 INFO L225 Difference]: With dead ends: 1428 [2021-03-10 22:08:16,540 INFO L226 Difference]: Without dead ends: 1428 [2021-03-10 22:08:16,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:16,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-03-10 22:08:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 858. [2021-03-10 22:08:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.469078179696616) internal successors, (2973), 857 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2973 transitions. [2021-03-10 22:08:16,558 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2973 transitions. Word has length 20 [2021-03-10 22:08:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:16,558 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2973 transitions. [2021-03-10 22:08:16,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2973 transitions. [2021-03-10 22:08:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:16,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:16,559 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:16,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4540 [2021-03-10 22:08:16,759 INFO L428 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2112083082, now seen corresponding path program 376 times [2021-03-10 22:08:16,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:16,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807899173] [2021-03-10 22:08:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:16,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807899173] [2021-03-10 22:08:16,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882659192] [2021-03-10 22:08:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:16,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:16,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:16,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:16,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:17,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:17,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:17,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296583156] [2021-03-10 22:08:17,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:17,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:17,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:17,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:17,052 INFO L87 Difference]: Start difference. First operand 858 states and 2973 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:18,468 INFO L93 Difference]: Finished difference Result 1652 states and 5101 transitions. [2021-03-10 22:08:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:08:18,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:18,471 INFO L225 Difference]: With dead ends: 1652 [2021-03-10 22:08:18,471 INFO L226 Difference]: Without dead ends: 1652 [2021-03-10 22:08:18,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1274.1ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:08:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-03-10 22:08:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 862. [2021-03-10 22:08:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.4761904761904763) internal successors, (2993), 861 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2993 transitions. [2021-03-10 22:08:18,482 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2993 transitions. Word has length 20 [2021-03-10 22:08:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:18,482 INFO L480 AbstractCegarLoop]: Abstraction has 862 states and 2993 transitions. [2021-03-10 22:08:18,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2993 transitions. [2021-03-10 22:08:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:18,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:18,483 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:18,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4546 [2021-03-10 22:08:18,684 INFO L428 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:18,684 INFO L82 PathProgramCache]: Analyzing trace with hash -751966342, now seen corresponding path program 377 times [2021-03-10 22:08:18,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:18,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576907527] [2021-03-10 22:08:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:18,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576907527] [2021-03-10 22:08:18,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54973052] [2021-03-10 22:08:18,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:18,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:18,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:18,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:18,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:19,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:19,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:19,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695395482] [2021-03-10 22:08:19,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:19,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:19,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:19,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:19,006 INFO L87 Difference]: Start difference. First operand 862 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:19,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:19,637 INFO L93 Difference]: Finished difference Result 1352 states and 4289 transitions. [2021-03-10 22:08:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:19,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:19,639 INFO L225 Difference]: With dead ends: 1352 [2021-03-10 22:08:19,639 INFO L226 Difference]: Without dead ends: 1352 [2021-03-10 22:08:19,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 611.8ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-03-10 22:08:19,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 859. [2021-03-10 22:08:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.479020979020979) internal successors, (2985), 858 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2985 transitions. [2021-03-10 22:08:19,650 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2985 transitions. Word has length 20 [2021-03-10 22:08:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:19,650 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 2985 transitions. [2021-03-10 22:08:19,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:19,650 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2985 transitions. [2021-03-10 22:08:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:19,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:19,651 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:19,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4555,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:19,852 INFO L428 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash -496664768, now seen corresponding path program 378 times [2021-03-10 22:08:19,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:19,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429972794] [2021-03-10 22:08:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:19,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429972794] [2021-03-10 22:08:19,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49034593] [2021-03-10 22:08:19,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:20,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:08:20,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:20,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:20,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:20,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:20,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:20,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585139564] [2021-03-10 22:08:20,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:20,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:20,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:20,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:20,225 INFO L87 Difference]: Start difference. First operand 859 states and 2985 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:20,972 INFO L93 Difference]: Finished difference Result 1315 states and 4199 transitions. [2021-03-10 22:08:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:08:20,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:20,974 INFO L225 Difference]: With dead ends: 1315 [2021-03-10 22:08:20,974 INFO L226 Difference]: Without dead ends: 1308 [2021-03-10 22:08:20,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 791.4ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-03-10 22:08:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 870. [2021-03-10 22:08:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4683544303797467) internal successors, (3014), 869 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3014 transitions. [2021-03-10 22:08:20,985 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3014 transitions. Word has length 20 [2021-03-10 22:08:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:20,985 INFO L480 AbstractCegarLoop]: Abstraction has 870 states and 3014 transitions. [2021-03-10 22:08:20,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3014 transitions. [2021-03-10 22:08:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:20,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:20,986 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:21,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4568 [2021-03-10 22:08:21,186 INFO L428 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:21,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:21,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1871238056, now seen corresponding path program 379 times [2021-03-10 22:08:21,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:21,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240981503] [2021-03-10 22:08:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:21,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240981503] [2021-03-10 22:08:21,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590739939] [2021-03-10 22:08:21,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:21,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:21,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:21,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:21,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:21,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288573398] [2021-03-10 22:08:21,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:21,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:21,560 INFO L87 Difference]: Start difference. First operand 870 states and 3014 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:22,223 INFO L93 Difference]: Finished difference Result 1280 states and 4130 transitions. [2021-03-10 22:08:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:22,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:22,225 INFO L225 Difference]: With dead ends: 1280 [2021-03-10 22:08:22,225 INFO L226 Difference]: Without dead ends: 1280 [2021-03-10 22:08:22,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-03-10 22:08:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 868. [2021-03-10 22:08:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4705882352941178) internal successors, (3009), 867 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3009 transitions. [2021-03-10 22:08:22,243 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3009 transitions. Word has length 20 [2021-03-10 22:08:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:22,243 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 3009 transitions. [2021-03-10 22:08:22,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3009 transitions. [2021-03-10 22:08:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:22,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:22,244 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:22,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4578,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:22,444 INFO L428 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:22,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1360682644, now seen corresponding path program 380 times [2021-03-10 22:08:22,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:22,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129081691] [2021-03-10 22:08:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:22,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129081691] [2021-03-10 22:08:22,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604078378] [2021-03-10 22:08:22,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:22,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:22,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:22,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:22,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:22,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:22,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184122484] [2021-03-10 22:08:22,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:22,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:22,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:22,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:22,726 INFO L87 Difference]: Start difference. First operand 868 states and 3009 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:23,778 INFO L93 Difference]: Finished difference Result 1521 states and 4808 transitions. [2021-03-10 22:08:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:08:23,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:23,780 INFO L225 Difference]: With dead ends: 1521 [2021-03-10 22:08:23,780 INFO L226 Difference]: Without dead ends: 1521 [2021-03-10 22:08:23,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 952.8ms TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:08:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-03-10 22:08:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 867. [2021-03-10 22:08:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.468822170900693) internal successors, (3004), 866 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 3004 transitions. [2021-03-10 22:08:23,792 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 3004 transitions. Word has length 20 [2021-03-10 22:08:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:23,792 INFO L480 AbstractCegarLoop]: Abstraction has 867 states and 3004 transitions. [2021-03-10 22:08:23,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 3004 transitions. [2021-03-10 22:08:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:23,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:23,793 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:23,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4592 [2021-03-10 22:08:23,993 INFO L428 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash -68340244, now seen corresponding path program 381 times [2021-03-10 22:08:23,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:23,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332279166] [2021-03-10 22:08:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:24,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332279166] [2021-03-10 22:08:24,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698026676] [2021-03-10 22:08:24,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:24,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:24,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:24,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:24,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:24,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:24,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:24,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387720621] [2021-03-10 22:08:24,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:24,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:24,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:24,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:24,286 INFO L87 Difference]: Start difference. First operand 867 states and 3004 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:25,266 INFO L93 Difference]: Finished difference Result 1513 states and 4786 transitions. [2021-03-10 22:08:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:08:25,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:25,268 INFO L225 Difference]: With dead ends: 1513 [2021-03-10 22:08:25,268 INFO L226 Difference]: Without dead ends: 1513 [2021-03-10 22:08:25,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 879.7ms TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:08:25,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-03-10 22:08:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 864. [2021-03-10 22:08:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.463499420625724) internal successors, (2989), 863 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2989 transitions. [2021-03-10 22:08:25,280 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2989 transitions. Word has length 20 [2021-03-10 22:08:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:25,280 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 2989 transitions. [2021-03-10 22:08:25,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2989 transitions. [2021-03-10 22:08:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:25,281 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:25,281 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:25,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4599,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:25,481 INFO L428 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1039597254, now seen corresponding path program 382 times [2021-03-10 22:08:25,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:25,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070179469] [2021-03-10 22:08:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:25,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070179469] [2021-03-10 22:08:25,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901305535] [2021-03-10 22:08:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:25,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:25,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:25,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:25,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:25,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:25,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:25,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367913247] [2021-03-10 22:08:25,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:25,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:25,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:25,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:25,764 INFO L87 Difference]: Start difference. First operand 864 states and 2989 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:26,215 INFO L93 Difference]: Finished difference Result 1366 states and 4397 transitions. [2021-03-10 22:08:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:26,217 INFO L225 Difference]: With dead ends: 1366 [2021-03-10 22:08:26,217 INFO L226 Difference]: Without dead ends: 1366 [2021-03-10 22:08:26,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:26,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-03-10 22:08:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 864. [2021-03-10 22:08:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.463499420625724) internal successors, (2989), 863 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2989 transitions. [2021-03-10 22:08:26,228 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2989 transitions. Word has length 20 [2021-03-10 22:08:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:26,228 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 2989 transitions. [2021-03-10 22:08:26,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2989 transitions. [2021-03-10 22:08:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:26,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:26,229 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:26,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4607,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:26,429 INFO L428 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash -844351768, now seen corresponding path program 383 times [2021-03-10 22:08:26,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:26,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922927788] [2021-03-10 22:08:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:26,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922927788] [2021-03-10 22:08:26,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085921089] [2021-03-10 22:08:26,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:26,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:26,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:26,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:26,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:26,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516394001] [2021-03-10 22:08:26,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:26,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:26,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:26,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:26,776 INFO L87 Difference]: Start difference. First operand 864 states and 2989 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:27,129 INFO L93 Difference]: Finished difference Result 1236 states and 4018 transitions. [2021-03-10 22:08:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:08:27,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:27,131 INFO L225 Difference]: With dead ends: 1236 [2021-03-10 22:08:27,131 INFO L226 Difference]: Without dead ends: 1236 [2021-03-10 22:08:27,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-03-10 22:08:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 861. [2021-03-10 22:08:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.4593023255813953) internal successors, (2975), 860 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2975 transitions. [2021-03-10 22:08:27,142 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2975 transitions. Word has length 20 [2021-03-10 22:08:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:27,142 INFO L480 AbstractCegarLoop]: Abstraction has 861 states and 2975 transitions. [2021-03-10 22:08:27,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2975 transitions. [2021-03-10 22:08:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:27,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:27,143 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:27,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4615 [2021-03-10 22:08:27,343 INFO L428 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:27,343 INFO L82 PathProgramCache]: Analyzing trace with hash 779986000, now seen corresponding path program 384 times [2021-03-10 22:08:27,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:27,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764228634] [2021-03-10 22:08:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:27,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764228634] [2021-03-10 22:08:27,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816585003] [2021-03-10 22:08:27,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:27,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:08:27,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:27,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:27,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:27,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:27,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291578717] [2021-03-10 22:08:27,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:27,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:27,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:27,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:27,695 INFO L87 Difference]: Start difference. First operand 861 states and 2975 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:28,071 INFO L93 Difference]: Finished difference Result 1206 states and 3951 transitions. [2021-03-10 22:08:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:08:28,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:28,073 INFO L225 Difference]: With dead ends: 1206 [2021-03-10 22:08:28,073 INFO L226 Difference]: Without dead ends: 1206 [2021-03-10 22:08:28,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-03-10 22:08:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 847. [2021-03-10 22:08:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.455082742316785) internal successors, (2923), 846 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2923 transitions. [2021-03-10 22:08:28,083 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2923 transitions. Word has length 20 [2021-03-10 22:08:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:28,083 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 2923 transitions. [2021-03-10 22:08:28,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2923 transitions. [2021-03-10 22:08:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:28,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:28,084 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:28,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4624,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:28,284 INFO L428 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:28,284 INFO L82 PathProgramCache]: Analyzing trace with hash -766554712, now seen corresponding path program 385 times [2021-03-10 22:08:28,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:28,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55412819] [2021-03-10 22:08:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:28,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55412819] [2021-03-10 22:08:28,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001196327] [2021-03-10 22:08:28,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:28,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:28,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:28,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:28,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:08:28,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398955976] [2021-03-10 22:08:28,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:08:28,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:28,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:08:28,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:08:28,582 INFO L87 Difference]: Start difference. First operand 847 states and 2923 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:29,141 INFO L93 Difference]: Finished difference Result 1146 states and 3724 transitions. [2021-03-10 22:08:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:29,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:29,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:29,143 INFO L225 Difference]: With dead ends: 1146 [2021-03-10 22:08:29,143 INFO L226 Difference]: Without dead ends: 1146 [2021-03-10 22:08:29,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 524.6ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:08:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-03-10 22:08:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 850. [2021-03-10 22:08:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.452296819787986) internal successors, (2931), 849 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2931 transitions. [2021-03-10 22:08:29,153 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2931 transitions. Word has length 20 [2021-03-10 22:08:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:29,153 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 2931 transitions. [2021-03-10 22:08:29,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2931 transitions. [2021-03-10 22:08:29,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:29,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:29,154 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:29,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4634 [2021-03-10 22:08:29,354 INFO L428 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:29,354 INFO L82 PathProgramCache]: Analyzing trace with hash -58196494, now seen corresponding path program 386 times [2021-03-10 22:08:29,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:29,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544307109] [2021-03-10 22:08:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:29,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544307109] [2021-03-10 22:08:29,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692299697] [2021-03-10 22:08:29,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:29,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:29,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:29,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:29,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:29,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:29,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:29,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990744178] [2021-03-10 22:08:29,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:29,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:29,617 INFO L87 Difference]: Start difference. First operand 850 states and 2931 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:30,271 INFO L93 Difference]: Finished difference Result 1236 states and 3964 transitions. [2021-03-10 22:08:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:08:30,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:30,274 INFO L225 Difference]: With dead ends: 1236 [2021-03-10 22:08:30,274 INFO L226 Difference]: Without dead ends: 1236 [2021-03-10 22:08:30,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:08:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-03-10 22:08:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 853. [2021-03-10 22:08:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.449530516431925) internal successors, (2939), 852 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2939 transitions. [2021-03-10 22:08:30,284 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2939 transitions. Word has length 20 [2021-03-10 22:08:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:30,285 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2939 transitions. [2021-03-10 22:08:30,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2939 transitions. [2021-03-10 22:08:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:30,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:30,286 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:30,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4637 [2021-03-10 22:08:30,486 INFO L428 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:30,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1301920246, now seen corresponding path program 387 times [2021-03-10 22:08:30,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:30,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326533885] [2021-03-10 22:08:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:30,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326533885] [2021-03-10 22:08:30,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986477640] [2021-03-10 22:08:30,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:30,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:08:30,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:30,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:30,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:30,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:30,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642524804] [2021-03-10 22:08:30,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:30,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:30,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:30,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:30,755 INFO L87 Difference]: Start difference. First operand 853 states and 2939 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:31,037 INFO L93 Difference]: Finished difference Result 1056 states and 3506 transitions. [2021-03-10 22:08:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:31,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:31,039 INFO L225 Difference]: With dead ends: 1056 [2021-03-10 22:08:31,039 INFO L226 Difference]: Without dead ends: 1056 [2021-03-10 22:08:31,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-03-10 22:08:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 847. [2021-03-10 22:08:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.455082742316785) internal successors, (2923), 846 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2923 transitions. [2021-03-10 22:08:31,048 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2923 transitions. Word has length 20 [2021-03-10 22:08:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:31,048 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 2923 transitions. [2021-03-10 22:08:31,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2923 transitions. [2021-03-10 22:08:31,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:31,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:31,049 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:31,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4641,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:31,250 INFO L428 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:31,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2129986682, now seen corresponding path program 388 times [2021-03-10 22:08:31,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:31,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4676873] [2021-03-10 22:08:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:31,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4676873] [2021-03-10 22:08:31,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189357866] [2021-03-10 22:08:31,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:31,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:31,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:31,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:31,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:31,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:31,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786058799] [2021-03-10 22:08:31,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:31,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:31,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:31,501 INFO L87 Difference]: Start difference. First operand 847 states and 2923 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:31,925 INFO L93 Difference]: Finished difference Result 1174 states and 3780 transitions. [2021-03-10 22:08:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:31,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:31,927 INFO L225 Difference]: With dead ends: 1174 [2021-03-10 22:08:31,927 INFO L226 Difference]: Without dead ends: 1174 [2021-03-10 22:08:31,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-03-10 22:08:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 853. [2021-03-10 22:08:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.4530516431924885) internal successors, (2942), 852 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2942 transitions. [2021-03-10 22:08:31,937 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2942 transitions. Word has length 20 [2021-03-10 22:08:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:31,937 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2942 transitions. [2021-03-10 22:08:31,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2942 transitions. [2021-03-10 22:08:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:31,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:31,938 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:32,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:32,139 INFO L428 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:32,139 INFO L82 PathProgramCache]: Analyzing trace with hash -804863874, now seen corresponding path program 389 times [2021-03-10 22:08:32,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:32,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322180833] [2021-03-10 22:08:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:32,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322180833] [2021-03-10 22:08:32,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134778623] [2021-03-10 22:08:32,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:32,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:32,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:32,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:32,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:32,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:32,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:32,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965427546] [2021-03-10 22:08:32,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:32,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:32,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:32,394 INFO L87 Difference]: Start difference. First operand 853 states and 2942 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:32,836 INFO L93 Difference]: Finished difference Result 1158 states and 3754 transitions. [2021-03-10 22:08:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:32,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:32,838 INFO L225 Difference]: With dead ends: 1158 [2021-03-10 22:08:32,838 INFO L226 Difference]: Without dead ends: 1158 [2021-03-10 22:08:32,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 394.9ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-03-10 22:08:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 856. [2021-03-10 22:08:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.4608187134502923) internal successors, (2959), 855 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2959 transitions. [2021-03-10 22:08:32,848 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2959 transitions. Word has length 20 [2021-03-10 22:08:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:32,849 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 2959 transitions. [2021-03-10 22:08:32,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2959 transitions. [2021-03-10 22:08:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:32,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:32,850 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:33,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4653,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:33,050 INFO L428 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1173934538, now seen corresponding path program 390 times [2021-03-10 22:08:33,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:33,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948283412] [2021-03-10 22:08:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:33,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948283412] [2021-03-10 22:08:33,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907286682] [2021-03-10 22:08:33,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:33,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:08:33,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:33,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:33,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:33,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:33,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27649346] [2021-03-10 22:08:33,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:33,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:33,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:33,296 INFO L87 Difference]: Start difference. First operand 856 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:33,783 INFO L93 Difference]: Finished difference Result 1050 states and 3492 transitions. [2021-03-10 22:08:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:33,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:33,785 INFO L225 Difference]: With dead ends: 1050 [2021-03-10 22:08:33,785 INFO L226 Difference]: Without dead ends: 1038 [2021-03-10 22:08:33,785 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-03-10 22:08:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 856. [2021-03-10 22:08:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.4573099415204678) internal successors, (2956), 855 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2956 transitions. [2021-03-10 22:08:33,794 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2956 transitions. Word has length 20 [2021-03-10 22:08:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:33,795 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 2956 transitions. [2021-03-10 22:08:33,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2956 transitions. [2021-03-10 22:08:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:33,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:33,796 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:33,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4659 [2021-03-10 22:08:33,996 INFO L428 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:33,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1343932662, now seen corresponding path program 391 times [2021-03-10 22:08:33,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:33,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879413536] [2021-03-10 22:08:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:34,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879413536] [2021-03-10 22:08:34,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536857384] [2021-03-10 22:08:34,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:34,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:34,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:34,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:08:34,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208294501] [2021-03-10 22:08:34,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:08:34,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:34,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:08:34,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:08:34,241 INFO L87 Difference]: Start difference. First operand 856 states and 2956 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:34,645 INFO L93 Difference]: Finished difference Result 1071 states and 3546 transitions. [2021-03-10 22:08:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:34,648 INFO L225 Difference]: With dead ends: 1071 [2021-03-10 22:08:34,648 INFO L226 Difference]: Without dead ends: 1071 [2021-03-10 22:08:34,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-03-10 22:08:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 844. [2021-03-10 22:08:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.457888493475682) internal successors, (2915), 843 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2915 transitions. [2021-03-10 22:08:34,657 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2915 transitions. Word has length 20 [2021-03-10 22:08:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:34,657 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 2915 transitions. [2021-03-10 22:08:34,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2915 transitions. [2021-03-10 22:08:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:34,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:34,658 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:34,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:34,859 INFO L428 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:34,859 INFO L82 PathProgramCache]: Analyzing trace with hash -225239522, now seen corresponding path program 392 times [2021-03-10 22:08:34,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:34,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470605359] [2021-03-10 22:08:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:34,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470605359] [2021-03-10 22:08:34,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269650770] [2021-03-10 22:08:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:35,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:35,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:35,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:35,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:35,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:35,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:35,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58612767] [2021-03-10 22:08:35,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:35,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:35,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:35,121 INFO L87 Difference]: Start difference. First operand 844 states and 2915 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:35,606 INFO L93 Difference]: Finished difference Result 1263 states and 4024 transitions. [2021-03-10 22:08:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:35,609 INFO L225 Difference]: With dead ends: 1263 [2021-03-10 22:08:35,609 INFO L226 Difference]: Without dead ends: 1263 [2021-03-10 22:08:35,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-03-10 22:08:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 852. [2021-03-10 22:08:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.461809635722679) internal successors, (2946), 851 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2946 transitions. [2021-03-10 22:08:35,619 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2946 transitions. Word has length 20 [2021-03-10 22:08:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:35,619 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2946 transitions. [2021-03-10 22:08:35,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2946 transitions. [2021-03-10 22:08:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:35,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:35,620 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:35,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4666,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:35,821 INFO L428 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash 483118696, now seen corresponding path program 393 times [2021-03-10 22:08:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:35,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726977132] [2021-03-10 22:08:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:35,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726977132] [2021-03-10 22:08:35,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416769441] [2021-03-10 22:08:35,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:35,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:35,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:35,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:35,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:36,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:36,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:36,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519556394] [2021-03-10 22:08:36,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:36,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:36,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:36,127 INFO L87 Difference]: Start difference. First operand 852 states and 2946 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:36,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:37,000 INFO L93 Difference]: Finished difference Result 1431 states and 4429 transitions. [2021-03-10 22:08:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:08:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:37,002 INFO L225 Difference]: With dead ends: 1431 [2021-03-10 22:08:37,002 INFO L226 Difference]: Without dead ends: 1431 [2021-03-10 22:08:37,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 773.1ms TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:08:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-03-10 22:08:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 852. [2021-03-10 22:08:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4688601645123383) internal successors, (2952), 851 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2952 transitions. [2021-03-10 22:08:37,014 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2952 transitions. Word has length 20 [2021-03-10 22:08:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:37,014 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2952 transitions. [2021-03-10 22:08:37,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2952 transitions. [2021-03-10 22:08:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:37,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:37,015 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:37,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4671 [2021-03-10 22:08:37,215 INFO L428 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:37,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1686879340, now seen corresponding path program 394 times [2021-03-10 22:08:37,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:37,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523060319] [2021-03-10 22:08:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:37,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523060319] [2021-03-10 22:08:37,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772249172] [2021-03-10 22:08:37,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:37,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:37,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:37,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:37,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:37,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:37,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488641657] [2021-03-10 22:08:37,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:37,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:37,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:37,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:37,506 INFO L87 Difference]: Start difference. First operand 852 states and 2952 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:37,961 INFO L93 Difference]: Finished difference Result 1118 states and 3661 transitions. [2021-03-10 22:08:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:37,963 INFO L225 Difference]: With dead ends: 1118 [2021-03-10 22:08:37,964 INFO L226 Difference]: Without dead ends: 1104 [2021-03-10 22:08:37,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-03-10 22:08:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 852. [2021-03-10 22:08:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4688601645123383) internal successors, (2952), 851 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2952 transitions. [2021-03-10 22:08:37,973 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2952 transitions. Word has length 20 [2021-03-10 22:08:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:37,973 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2952 transitions. [2021-03-10 22:08:37,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2952 transitions. [2021-03-10 22:08:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:37,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:37,974 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:38,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4678,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:38,175 INFO L428 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:38,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1593337576, now seen corresponding path program 395 times [2021-03-10 22:08:38,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:38,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383679465] [2021-03-10 22:08:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:38,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383679465] [2021-03-10 22:08:38,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408729454] [2021-03-10 22:08:38,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:38,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:38,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:38,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:38,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:38,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:38,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:38,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989651549] [2021-03-10 22:08:38,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:38,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:38,472 INFO L87 Difference]: Start difference. First operand 852 states and 2952 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:38,934 INFO L93 Difference]: Finished difference Result 1205 states and 3887 transitions. [2021-03-10 22:08:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:38,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:38,936 INFO L225 Difference]: With dead ends: 1205 [2021-03-10 22:08:38,936 INFO L226 Difference]: Without dead ends: 1205 [2021-03-10 22:08:38,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-03-10 22:08:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 848. [2021-03-10 22:08:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.4663518299881937) internal successors, (2936), 847 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2936 transitions. [2021-03-10 22:08:38,946 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2936 transitions. Word has length 20 [2021-03-10 22:08:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:38,946 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 2936 transitions. [2021-03-10 22:08:38,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2936 transitions. [2021-03-10 22:08:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:38,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:38,947 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:39,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4686,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:39,148 INFO L428 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1518863640, now seen corresponding path program 396 times [2021-03-10 22:08:39,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:39,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134172604] [2021-03-10 22:08:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:39,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134172604] [2021-03-10 22:08:39,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019597968] [2021-03-10 22:08:39,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:39,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:08:39,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:39,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:39,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:39,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:39,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879359781] [2021-03-10 22:08:39,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:39,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:39,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:39,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:39,442 INFO L87 Difference]: Start difference. First operand 848 states and 2936 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:39,925 INFO L93 Difference]: Finished difference Result 1217 states and 3916 transitions. [2021-03-10 22:08:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:39,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:39,927 INFO L225 Difference]: With dead ends: 1217 [2021-03-10 22:08:39,927 INFO L226 Difference]: Without dead ends: 1217 [2021-03-10 22:08:39,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-03-10 22:08:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 851. [2021-03-10 22:08:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.471764705882353) internal successors, (2951), 850 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2951 transitions. [2021-03-10 22:08:39,937 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2951 transitions. Word has length 20 [2021-03-10 22:08:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:39,937 INFO L480 AbstractCegarLoop]: Abstraction has 851 states and 2951 transitions. [2021-03-10 22:08:39,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2951 transitions. [2021-03-10 22:08:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:39,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:39,938 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:40,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4690 [2021-03-10 22:08:40,139 INFO L428 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:40,139 INFO L82 PathProgramCache]: Analyzing trace with hash 818966700, now seen corresponding path program 397 times [2021-03-10 22:08:40,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:40,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527509006] [2021-03-10 22:08:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:40,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527509006] [2021-03-10 22:08:40,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723738829] [2021-03-10 22:08:40,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:40,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:40,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:40,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:40,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:40,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577104330] [2021-03-10 22:08:40,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:40,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:40,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:40,407 INFO L87 Difference]: Start difference. First operand 851 states and 2951 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:40,834 INFO L93 Difference]: Finished difference Result 1184 states and 3839 transitions. [2021-03-10 22:08:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:40,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:40,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:40,836 INFO L225 Difference]: With dead ends: 1184 [2021-03-10 22:08:40,836 INFO L226 Difference]: Without dead ends: 1184 [2021-03-10 22:08:40,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-03-10 22:08:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 845. [2021-03-10 22:08:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.4609004739336493) internal successors, (2921), 844 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2921 transitions. [2021-03-10 22:08:40,846 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2921 transitions. Word has length 20 [2021-03-10 22:08:40,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:40,846 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2921 transitions. [2021-03-10 22:08:40,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2921 transitions. [2021-03-10 22:08:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:40,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:40,847 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:41,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4697,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:41,048 INFO L428 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:41,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1914137786, now seen corresponding path program 398 times [2021-03-10 22:08:41,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:41,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95776717] [2021-03-10 22:08:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:41,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95776717] [2021-03-10 22:08:41,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191990057] [2021-03-10 22:08:41,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:41,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:41,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:41,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:41,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:41,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849249512] [2021-03-10 22:08:41,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:41,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:41,370 INFO L87 Difference]: Start difference. First operand 845 states and 2921 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:42,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:42,396 INFO L93 Difference]: Finished difference Result 1435 states and 4469 transitions. [2021-03-10 22:08:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:08:42,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:42,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:42,399 INFO L225 Difference]: With dead ends: 1435 [2021-03-10 22:08:42,399 INFO L226 Difference]: Without dead ends: 1435 [2021-03-10 22:08:42,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 917.6ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:08:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-03-10 22:08:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 850. [2021-03-10 22:08:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.471142520612485) internal successors, (2947), 849 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2947 transitions. [2021-03-10 22:08:42,410 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2947 transitions. Word has length 20 [2021-03-10 22:08:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:42,410 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 2947 transitions. [2021-03-10 22:08:42,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2947 transitions. [2021-03-10 22:08:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:42,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:42,411 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:42,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4704 [2021-03-10 22:08:42,612 INFO L428 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1602491628, now seen corresponding path program 399 times [2021-03-10 22:08:42,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:42,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940945923] [2021-03-10 22:08:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:42,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940945923] [2021-03-10 22:08:42,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8787342] [2021-03-10 22:08:42,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:42,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:42,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:42,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:42,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:42,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:42,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782274155] [2021-03-10 22:08:42,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:42,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:42,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:42,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:42,947 INFO L87 Difference]: Start difference. First operand 850 states and 2947 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:43,474 INFO L93 Difference]: Finished difference Result 1144 states and 3730 transitions. [2021-03-10 22:08:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:43,476 INFO L225 Difference]: With dead ends: 1144 [2021-03-10 22:08:43,476 INFO L226 Difference]: Without dead ends: 1144 [2021-03-10 22:08:43,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 450.0ms TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-03-10 22:08:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 851. [2021-03-10 22:08:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.4741176470588235) internal successors, (2953), 850 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2953 transitions. [2021-03-10 22:08:43,486 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2953 transitions. Word has length 20 [2021-03-10 22:08:43,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:43,486 INFO L480 AbstractCegarLoop]: Abstraction has 851 states and 2953 transitions. [2021-03-10 22:08:43,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2953 transitions. [2021-03-10 22:08:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:43,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:43,487 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:43,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4712,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:43,688 INFO L428 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1629429072, now seen corresponding path program 400 times [2021-03-10 22:08:43,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:43,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607354416] [2021-03-10 22:08:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:43,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607354416] [2021-03-10 22:08:43,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832859549] [2021-03-10 22:08:43,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:43,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:43,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:43,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:43,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:43,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796185147] [2021-03-10 22:08:43,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:43,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:43,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:43,990 INFO L87 Difference]: Start difference. First operand 851 states and 2953 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:44,788 INFO L93 Difference]: Finished difference Result 1285 states and 4133 transitions. [2021-03-10 22:08:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:08:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:44,791 INFO L225 Difference]: With dead ends: 1285 [2021-03-10 22:08:44,791 INFO L226 Difference]: Without dead ends: 1285 [2021-03-10 22:08:44,791 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 669.7ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:08:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-03-10 22:08:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 850. [2021-03-10 22:08:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.4723203769140163) internal successors, (2948), 849 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2948 transitions. [2021-03-10 22:08:44,801 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2948 transitions. Word has length 20 [2021-03-10 22:08:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:44,801 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 2948 transitions. [2021-03-10 22:08:44,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2948 transitions. [2021-03-10 22:08:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:44,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:44,802 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:45,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4731,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:45,002 INFO L428 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash -337086672, now seen corresponding path program 401 times [2021-03-10 22:08:45,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:45,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667322711] [2021-03-10 22:08:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:45,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667322711] [2021-03-10 22:08:45,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373346658] [2021-03-10 22:08:45,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:45,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:45,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:45,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:45,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:45,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:45,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800899998] [2021-03-10 22:08:45,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:45,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:45,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:45,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:45,317 INFO L87 Difference]: Start difference. First operand 850 states and 2948 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:46,067 INFO L93 Difference]: Finished difference Result 1277 states and 4111 transitions. [2021-03-10 22:08:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:08:46,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:46,069 INFO L225 Difference]: With dead ends: 1277 [2021-03-10 22:08:46,069 INFO L226 Difference]: Without dead ends: 1277 [2021-03-10 22:08:46,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 685.6ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:08:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-03-10 22:08:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 847. [2021-03-10 22:08:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.466903073286052) internal successors, (2933), 846 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2933 transitions. [2021-03-10 22:08:46,080 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2933 transitions. Word has length 20 [2021-03-10 22:08:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:46,080 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 2933 transitions. [2021-03-10 22:08:46,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2933 transitions. [2021-03-10 22:08:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:46,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:46,081 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:46,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4739,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:46,282 INFO L428 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:46,282 INFO L82 PathProgramCache]: Analyzing trace with hash 770850826, now seen corresponding path program 402 times [2021-03-10 22:08:46,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:46,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150300784] [2021-03-10 22:08:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:46,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150300784] [2021-03-10 22:08:46,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940718948] [2021-03-10 22:08:46,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:46,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:08:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:46,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:46,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:46,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:46,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:46,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757722316] [2021-03-10 22:08:46,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:46,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:46,564 INFO L87 Difference]: Start difference. First operand 847 states and 2933 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:47,046 INFO L93 Difference]: Finished difference Result 1193 states and 3873 transitions. [2021-03-10 22:08:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:47,048 INFO L225 Difference]: With dead ends: 1193 [2021-03-10 22:08:47,048 INFO L226 Difference]: Without dead ends: 1193 [2021-03-10 22:08:47,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-03-10 22:08:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 847. [2021-03-10 22:08:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.466903073286052) internal successors, (2933), 846 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2933 transitions. [2021-03-10 22:08:47,063 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2933 transitions. Word has length 20 [2021-03-10 22:08:47,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:47,064 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 2933 transitions. [2021-03-10 22:08:47,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2933 transitions. [2021-03-10 22:08:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:47,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:47,065 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:47,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4746 [2021-03-10 22:08:47,265 INFO L428 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash 511239572, now seen corresponding path program 403 times [2021-03-10 22:08:47,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:47,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915467621] [2021-03-10 22:08:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:47,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915467621] [2021-03-10 22:08:47,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152930680] [2021-03-10 22:08:47,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:47,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:47,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:47,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:47,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920878592] [2021-03-10 22:08:47,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:47,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:47,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:47,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:47,614 INFO L87 Difference]: Start difference. First operand 847 states and 2933 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:47,938 INFO L93 Difference]: Finished difference Result 1084 states and 3596 transitions. [2021-03-10 22:08:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:47,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:47,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:47,940 INFO L225 Difference]: With dead ends: 1084 [2021-03-10 22:08:47,940 INFO L226 Difference]: Without dead ends: 1084 [2021-03-10 22:08:47,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-03-10 22:08:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 844. [2021-03-10 22:08:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.457888493475682) internal successors, (2915), 843 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2915 transitions. [2021-03-10 22:08:47,949 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2915 transitions. Word has length 20 [2021-03-10 22:08:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:47,949 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 2915 transitions. [2021-03-10 22:08:47,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2915 transitions. [2021-03-10 22:08:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:47,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:47,950 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:48,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4753,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:48,151 INFO L428 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash -753061784, now seen corresponding path program 404 times [2021-03-10 22:08:48,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:48,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248209479] [2021-03-10 22:08:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:48,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248209479] [2021-03-10 22:08:48,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762963792] [2021-03-10 22:08:48,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:48,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:48,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:48,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:48,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:48,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:48,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:48,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254803984] [2021-03-10 22:08:48,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:48,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:48,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:48,471 INFO L87 Difference]: Start difference. First operand 844 states and 2915 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:49,213 INFO L93 Difference]: Finished difference Result 1228 states and 3916 transitions. [2021-03-10 22:08:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:49,215 INFO L225 Difference]: With dead ends: 1228 [2021-03-10 22:08:49,215 INFO L226 Difference]: Without dead ends: 1228 [2021-03-10 22:08:49,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 650.3ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-03-10 22:08:49,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 848. [2021-03-10 22:08:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.461629279811098) internal successors, (2932), 847 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2932 transitions. [2021-03-10 22:08:49,226 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2932 transitions. Word has length 20 [2021-03-10 22:08:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:49,226 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 2932 transitions. [2021-03-10 22:08:49,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2932 transitions. [2021-03-10 22:08:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:49,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:49,227 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:49,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4761 [2021-03-10 22:08:49,427 INFO L428 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:49,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:49,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1709113928, now seen corresponding path program 405 times [2021-03-10 22:08:49,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:49,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558050841] [2021-03-10 22:08:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:49,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558050841] [2021-03-10 22:08:49,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632585433] [2021-03-10 22:08:49,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:49,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:49,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:49,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:49,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:49,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:49,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:49,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120028024] [2021-03-10 22:08:49,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:49,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:49,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:49,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:49,773 INFO L87 Difference]: Start difference. First operand 848 states and 2932 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:50,311 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:08:50,602 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 22:08:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:50,620 INFO L93 Difference]: Finished difference Result 1056 states and 3502 transitions. [2021-03-10 22:08:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:50,623 INFO L225 Difference]: With dead ends: 1056 [2021-03-10 22:08:50,623 INFO L226 Difference]: Without dead ends: 1044 [2021-03-10 22:08:50,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 789.7ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-03-10 22:08:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 848. [2021-03-10 22:08:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.458087367178276) internal successors, (2929), 847 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2929 transitions. [2021-03-10 22:08:50,632 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2929 transitions. Word has length 20 [2021-03-10 22:08:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:50,632 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 2929 transitions. [2021-03-10 22:08:50,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2929 transitions. [2021-03-10 22:08:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:50,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:50,633 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:50,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4769,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:50,833 INFO L428 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:50,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1539115804, now seen corresponding path program 406 times [2021-03-10 22:08:50,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:50,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414944491] [2021-03-10 22:08:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:50,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414944491] [2021-03-10 22:08:50,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885110767] [2021-03-10 22:08:50,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:50,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:50,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:51,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:51,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:08:51,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337144433] [2021-03-10 22:08:51,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:08:51,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:51,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:08:51,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:08:51,171 INFO L87 Difference]: Start difference. First operand 848 states and 2929 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:51,690 INFO L93 Difference]: Finished difference Result 1092 states and 3609 transitions. [2021-03-10 22:08:51,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:51,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:51,692 INFO L225 Difference]: With dead ends: 1092 [2021-03-10 22:08:51,692 INFO L226 Difference]: Without dead ends: 1092 [2021-03-10 22:08:51,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:51,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-03-10 22:08:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 849. [2021-03-10 22:08:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.464622641509434) internal successors, (2938), 848 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2938 transitions. [2021-03-10 22:08:51,702 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2938 transitions. Word has length 20 [2021-03-10 22:08:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:51,702 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 2938 transitions. [2021-03-10 22:08:51,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2938 transitions. [2021-03-10 22:08:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:51,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:51,703 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:51,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4778 [2021-03-10 22:08:51,903 INFO L428 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:51,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1065515314, now seen corresponding path program 407 times [2021-03-10 22:08:51,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:51,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84215589] [2021-03-10 22:08:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:51,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84215589] [2021-03-10 22:08:51,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662095904] [2021-03-10 22:08:51,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:52,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:52,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:52,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:52,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:52,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:52,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:52,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446231527] [2021-03-10 22:08:52,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:52,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:52,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:52,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:52,236 INFO L87 Difference]: Start difference. First operand 849 states and 2938 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:52,900 INFO L93 Difference]: Finished difference Result 1431 states and 4407 transitions. [2021-03-10 22:08:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:08:52,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:52,902 INFO L225 Difference]: With dead ends: 1431 [2021-03-10 22:08:52,902 INFO L226 Difference]: Without dead ends: 1431 [2021-03-10 22:08:52,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 600.1ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:08:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-03-10 22:08:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 854. [2021-03-10 22:08:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.474794841735053) internal successors, (2964), 853 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2964 transitions. [2021-03-10 22:08:52,914 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2964 transitions. Word has length 20 [2021-03-10 22:08:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:52,914 INFO L480 AbstractCegarLoop]: Abstraction has 854 states and 2964 transitions. [2021-03-10 22:08:52,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,915 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2964 transitions. [2021-03-10 22:08:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:52,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:52,915 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:53,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4784,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:53,116 INFO L428 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:53,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:53,116 INFO L82 PathProgramCache]: Analyzing trace with hash 753869156, now seen corresponding path program 408 times [2021-03-10 22:08:53,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:53,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225852690] [2021-03-10 22:08:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225852690] [2021-03-10 22:08:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067906732] [2021-03-10 22:08:53,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:53,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:08:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:53,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:53,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:53,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:53,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707616353] [2021-03-10 22:08:53,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:53,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:53,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:53,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:53,451 INFO L87 Difference]: Start difference. First operand 854 states and 2964 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:53,871 INFO L93 Difference]: Finished difference Result 1174 states and 3835 transitions. [2021-03-10 22:08:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:53,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:53,874 INFO L225 Difference]: With dead ends: 1174 [2021-03-10 22:08:53,874 INFO L226 Difference]: Without dead ends: 1174 [2021-03-10 22:08:53,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-03-10 22:08:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 857. [2021-03-10 22:08:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.4801401869158877) internal successors, (2979), 856 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2979 transitions. [2021-03-10 22:08:53,884 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2979 transitions. Word has length 20 [2021-03-10 22:08:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:53,884 INFO L480 AbstractCegarLoop]: Abstraction has 857 states and 2979 transitions. [2021-03-10 22:08:53,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:53,884 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2979 transitions. [2021-03-10 22:08:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:53,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:53,885 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:54,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4792 [2021-03-10 22:08:54,085 INFO L428 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1816915752, now seen corresponding path program 409 times [2021-03-10 22:08:54,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:54,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941929056] [2021-03-10 22:08:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:54,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941929056] [2021-03-10 22:08:54,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255357642] [2021-03-10 22:08:54,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:54,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:54,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:54,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:54,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:54,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849297207] [2021-03-10 22:08:54,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:54,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:54,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:54,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:54,436 INFO L87 Difference]: Start difference. First operand 857 states and 2979 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:55,030 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 22:08:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:55,159 INFO L93 Difference]: Finished difference Result 1267 states and 4040 transitions. [2021-03-10 22:08:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:55,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:55,161 INFO L225 Difference]: With dead ends: 1267 [2021-03-10 22:08:55,161 INFO L226 Difference]: Without dead ends: 1267 [2021-03-10 22:08:55,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 592.3ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-03-10 22:08:55,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 856. [2021-03-10 22:08:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.478362573099415) internal successors, (2974), 855 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2974 transitions. [2021-03-10 22:08:55,171 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2974 transitions. Word has length 20 [2021-03-10 22:08:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:55,171 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 2974 transitions. [2021-03-10 22:08:55,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2974 transitions. [2021-03-10 22:08:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:55,172 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:55,172 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:55,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4799 [2021-03-10 22:08:55,372 INFO L428 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:55,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1185709144, now seen corresponding path program 410 times [2021-03-10 22:08:55,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:55,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634558102] [2021-03-10 22:08:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:55,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634558102] [2021-03-10 22:08:55,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523463503] [2021-03-10 22:08:55,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:55,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:55,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:55,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:55,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:55,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:55,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181734565] [2021-03-10 22:08:55,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:55,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:55,688 INFO L87 Difference]: Start difference. First operand 856 states and 2974 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:56,352 INFO L93 Difference]: Finished difference Result 1230 states and 3958 transitions. [2021-03-10 22:08:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:56,352 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:56,354 INFO L225 Difference]: With dead ends: 1230 [2021-03-10 22:08:56,354 INFO L226 Difference]: Without dead ends: 1230 [2021-03-10 22:08:56,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 574.2ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-03-10 22:08:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 853. [2021-03-10 22:08:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.473004694835681) internal successors, (2959), 852 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2959 transitions. [2021-03-10 22:08:56,364 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2959 transitions. Word has length 20 [2021-03-10 22:08:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:56,364 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2959 transitions. [2021-03-10 22:08:56,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2959 transitions. [2021-03-10 22:08:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:56,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:56,365 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:56,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4815,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:56,566 INFO L428 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:56,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1837652280, now seen corresponding path program 411 times [2021-03-10 22:08:56,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:56,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131839062] [2021-03-10 22:08:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:56,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131839062] [2021-03-10 22:08:56,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209627550] [2021-03-10 22:08:56,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:56,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:56,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:56,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:56,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:56,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:56,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:56,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849545565] [2021-03-10 22:08:56,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:56,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:56,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:56,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:56,911 INFO L87 Difference]: Start difference. First operand 853 states and 2959 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:57,526 INFO L93 Difference]: Finished difference Result 1153 states and 3754 transitions. [2021-03-10 22:08:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:57,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:57,528 INFO L225 Difference]: With dead ends: 1153 [2021-03-10 22:08:57,528 INFO L226 Difference]: Without dead ends: 1147 [2021-03-10 22:08:57,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-03-10 22:08:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 863. [2021-03-10 22:08:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4640371229698377) internal successors, (2986), 862 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2986 transitions. [2021-03-10 22:08:57,539 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2986 transitions. Word has length 20 [2021-03-10 22:08:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:57,539 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 2986 transitions. [2021-03-10 22:08:57,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2986 transitions. [2021-03-10 22:08:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:57,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:57,540 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:57,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4825,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:57,741 INFO L428 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash -77771646, now seen corresponding path program 412 times [2021-03-10 22:08:57,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:57,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652542973] [2021-03-10 22:08:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652542973] [2021-03-10 22:08:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497566673] [2021-03-10 22:08:57,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:57,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:57,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:58,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:58,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:58,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872844962] [2021-03-10 22:08:58,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:58,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:58,071 INFO L87 Difference]: Start difference. First operand 863 states and 2986 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:58,642 INFO L93 Difference]: Finished difference Result 1228 states and 3953 transitions. [2021-03-10 22:08:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:58,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:58,644 INFO L225 Difference]: With dead ends: 1228 [2021-03-10 22:08:58,644 INFO L226 Difference]: Without dead ends: 1228 [2021-03-10 22:08:58,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-03-10 22:08:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 853. [2021-03-10 22:08:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.473004694835681) internal successors, (2959), 852 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2959 transitions. [2021-03-10 22:08:58,655 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2959 transitions. Word has length 20 [2021-03-10 22:08:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:58,655 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2959 transitions. [2021-03-10 22:08:58,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2959 transitions. [2021-03-10 22:08:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:58,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:58,656 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:58,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4833 [2021-03-10 22:08:58,856 INFO L428 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1961720668, now seen corresponding path program 413 times [2021-03-10 22:08:58,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:58,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960226361] [2021-03-10 22:08:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:58,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960226361] [2021-03-10 22:08:58,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78729488] [2021-03-10 22:08:58,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:59,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:59,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:59,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:59,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:59,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:59,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673319181] [2021-03-10 22:08:59,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:59,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:59,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:59,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:59,212 INFO L87 Difference]: Start difference. First operand 853 states and 2959 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:59,603 INFO L93 Difference]: Finished difference Result 1226 states and 3970 transitions. [2021-03-10 22:08:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:08:59,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:59,606 INFO L225 Difference]: With dead ends: 1226 [2021-03-10 22:08:59,606 INFO L226 Difference]: Without dead ends: 1226 [2021-03-10 22:08:59,606 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-03-10 22:08:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 854. [2021-03-10 22:08:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4759671746776086) internal successors, (2965), 853 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2965 transitions. [2021-03-10 22:08:59,616 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2965 transitions. Word has length 20 [2021-03-10 22:08:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:59,617 INFO L480 AbstractCegarLoop]: Abstraction has 854 states and 2965 transitions. [2021-03-10 22:08:59,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2965 transitions. [2021-03-10 22:08:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:59,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:59,618 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:59,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4841,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:59,818 INFO L428 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash -337382900, now seen corresponding path program 414 times [2021-03-10 22:08:59,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:59,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273217824] [2021-03-10 22:08:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:59,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273217824] [2021-03-10 22:08:59,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891051564] [2021-03-10 22:08:59,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:59,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:08:59,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:08:59,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:00,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:00,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:00,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323232821] [2021-03-10 22:09:00,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:00,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:00,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:00,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:00,116 INFO L87 Difference]: Start difference. First operand 854 states and 2965 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:00,462 INFO L93 Difference]: Finished difference Result 1223 states and 3955 transitions. [2021-03-10 22:09:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:00,462 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:00,464 INFO L225 Difference]: With dead ends: 1223 [2021-03-10 22:09:00,464 INFO L226 Difference]: Without dead ends: 1223 [2021-03-10 22:09:00,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-03-10 22:09:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 852. [2021-03-10 22:09:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.470035252643948) internal successors, (2953), 851 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2953 transitions. [2021-03-10 22:09:00,475 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2953 transitions. Word has length 20 [2021-03-10 22:09:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:00,475 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2953 transitions. [2021-03-10 22:09:00,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2953 transitions. [2021-03-10 22:09:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:00,482 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:00,482 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:00,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4850,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:00,682 INFO L428 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash -181205336, now seen corresponding path program 415 times [2021-03-10 22:09:00,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:00,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610362212] [2021-03-10 22:09:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:00,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610362212] [2021-03-10 22:09:00,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698563190] [2021-03-10 22:09:00,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:00,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:01,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:01,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:01,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377589558] [2021-03-10 22:09:01,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:01,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:01,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:01,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:01,002 INFO L87 Difference]: Start difference. First operand 852 states and 2953 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:01,532 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:09:01,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:01,901 INFO L93 Difference]: Finished difference Result 1057 states and 3518 transitions. [2021-03-10 22:09:01,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:01,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:01,904 INFO L225 Difference]: With dead ends: 1057 [2021-03-10 22:09:01,904 INFO L226 Difference]: Without dead ends: 1045 [2021-03-10 22:09:01,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 853.0ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:09:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-03-10 22:09:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 854. [2021-03-10 22:09:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.47010550996483) internal successors, (2960), 853 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2960 transitions. [2021-03-10 22:09:01,913 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2960 transitions. Word has length 20 [2021-03-10 22:09:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:01,913 INFO L480 AbstractCegarLoop]: Abstraction has 854 states and 2960 transitions. [2021-03-10 22:09:01,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2960 transitions. [2021-03-10 22:09:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:01,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:01,914 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:02,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4858,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:02,115 INFO L428 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:02,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:02,115 INFO L82 PathProgramCache]: Analyzing trace with hash 570195102, now seen corresponding path program 416 times [2021-03-10 22:09:02,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:02,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747365846] [2021-03-10 22:09:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:02,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747365846] [2021-03-10 22:09:02,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346010239] [2021-03-10 22:09:02,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:02,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:02,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:02,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:02,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:02,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:02,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:02,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920850312] [2021-03-10 22:09:02,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:02,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:02,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:02,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:02,430 INFO L87 Difference]: Start difference. First operand 854 states and 2960 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:03,137 INFO L93 Difference]: Finished difference Result 1082 states and 3570 transitions. [2021-03-10 22:09:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:03,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:03,139 INFO L225 Difference]: With dead ends: 1082 [2021-03-10 22:09:03,139 INFO L226 Difference]: Without dead ends: 1076 [2021-03-10 22:09:03,139 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 654.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:09:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-03-10 22:09:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 864. [2021-03-10 22:09:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.4611819235225956) internal successors, (2987), 863 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2987 transitions. [2021-03-10 22:09:03,148 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2987 transitions. Word has length 20 [2021-03-10 22:09:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:03,149 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 2987 transitions. [2021-03-10 22:09:03,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2987 transitions. [2021-03-10 22:09:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:03,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:03,150 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:03,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4864 [2021-03-10 22:09:03,350 INFO L428 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1345228824, now seen corresponding path program 417 times [2021-03-10 22:09:03,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:03,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672338905] [2021-03-10 22:09:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:03,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672338905] [2021-03-10 22:09:03,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722731090] [2021-03-10 22:09:03,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:03,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:03,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:03,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:03,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:03,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:03,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:03,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993218432] [2021-03-10 22:09:03,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:03,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:03,712 INFO L87 Difference]: Start difference. First operand 864 states and 2987 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:04,419 INFO L93 Difference]: Finished difference Result 1151 states and 3754 transitions. [2021-03-10 22:09:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:04,420 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:04,422 INFO L225 Difference]: With dead ends: 1151 [2021-03-10 22:09:04,422 INFO L226 Difference]: Without dead ends: 1151 [2021-03-10 22:09:04,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 721.1ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:09:04,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-03-10 22:09:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 852. [2021-03-10 22:09:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.470035252643948) internal successors, (2953), 851 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2953 transitions. [2021-03-10 22:09:04,431 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2953 transitions. Word has length 20 [2021-03-10 22:09:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:04,431 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2953 transitions. [2021-03-10 22:09:04,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2953 transitions. [2021-03-10 22:09:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:04,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:04,432 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:04,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4871 [2021-03-10 22:09:04,633 INFO L428 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:04,633 INFO L82 PathProgramCache]: Analyzing trace with hash -108096714, now seen corresponding path program 418 times [2021-03-10 22:09:04,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:04,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46093332] [2021-03-10 22:09:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:04,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46093332] [2021-03-10 22:09:04,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772414224] [2021-03-10 22:09:04,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:04,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:04,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:04,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:04,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:04,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:04,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520657554] [2021-03-10 22:09:04,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:04,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:04,919 INFO L87 Difference]: Start difference. First operand 852 states and 2953 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:05,368 INFO L93 Difference]: Finished difference Result 1092 states and 3618 transitions. [2021-03-10 22:09:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:05,370 INFO L225 Difference]: With dead ends: 1092 [2021-03-10 22:09:05,370 INFO L226 Difference]: Without dead ends: 1092 [2021-03-10 22:09:05,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-03-10 22:09:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 851. [2021-03-10 22:09:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.471764705882353) internal successors, (2951), 850 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2951 transitions. [2021-03-10 22:09:05,379 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2951 transitions. Word has length 20 [2021-03-10 22:09:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:05,379 INFO L480 AbstractCegarLoop]: Abstraction has 851 states and 2951 transitions. [2021-03-10 22:09:05,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2951 transitions. [2021-03-10 22:09:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:05,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:05,380 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:05,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4878 [2021-03-10 22:09:05,581 INFO L428 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 643303724, now seen corresponding path program 419 times [2021-03-10 22:09:05,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:05,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207358444] [2021-03-10 22:09:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:05,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207358444] [2021-03-10 22:09:05,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677144899] [2021-03-10 22:09:05,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:05,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:09:05,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:05,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:05,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226264587] [2021-03-10 22:09:05,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:05,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:05,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:05,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:05,883 INFO L87 Difference]: Start difference. First operand 851 states and 2951 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:06,290 INFO L93 Difference]: Finished difference Result 1122 states and 3693 transitions. [2021-03-10 22:09:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:06,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:06,293 INFO L225 Difference]: With dead ends: 1122 [2021-03-10 22:09:06,293 INFO L226 Difference]: Without dead ends: 1122 [2021-03-10 22:09:06,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 394.9ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:06,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-03-10 22:09:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 851. [2021-03-10 22:09:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.471764705882353) internal successors, (2951), 850 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2951 transitions. [2021-03-10 22:09:06,303 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2951 transitions. Word has length 20 [2021-03-10 22:09:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:06,303 INFO L480 AbstractCegarLoop]: Abstraction has 851 states and 2951 transitions. [2021-03-10 22:09:06,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2951 transitions. [2021-03-10 22:09:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:06,304 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:06,304 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:06,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4883,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:06,504 INFO L428 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:06,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:06,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2027325804, now seen corresponding path program 420 times [2021-03-10 22:09:06,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:06,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597601860] [2021-03-10 22:09:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:06,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597601860] [2021-03-10 22:09:06,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145609865] [2021-03-10 22:09:06,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:06,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:09:06,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:06,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:06,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350611605] [2021-03-10 22:09:06,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:06,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:06,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:06,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:06,835 INFO L87 Difference]: Start difference. First operand 851 states and 2951 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:07,242 INFO L93 Difference]: Finished difference Result 1080 states and 3591 transitions. [2021-03-10 22:09:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:07,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:07,245 INFO L225 Difference]: With dead ends: 1080 [2021-03-10 22:09:07,245 INFO L226 Difference]: Without dead ends: 1080 [2021-03-10 22:09:07,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-03-10 22:09:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 841. [2021-03-10 22:09:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.4511904761904764) internal successors, (2899), 840 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2899 transitions. [2021-03-10 22:09:07,254 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2899 transitions. Word has length 20 [2021-03-10 22:09:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:07,254 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2899 transitions. [2021-03-10 22:09:07,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2899 transitions. [2021-03-10 22:09:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:07,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:07,255 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:07,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4890,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:07,455 INFO L428 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash 432548454, now seen corresponding path program 421 times [2021-03-10 22:09:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:07,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504845896] [2021-03-10 22:09:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:07,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504845896] [2021-03-10 22:09:07,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306566341] [2021-03-10 22:09:07,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:07,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:07,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:09:07,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40059815] [2021-03-10 22:09:07,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:09:07,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:07,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:09:07,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:09:07,683 INFO L87 Difference]: Start difference. First operand 841 states and 2899 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:08,146 INFO L93 Difference]: Finished difference Result 1292 states and 4137 transitions. [2021-03-10 22:09:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:08,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:08,148 INFO L225 Difference]: With dead ends: 1292 [2021-03-10 22:09:08,148 INFO L226 Difference]: Without dead ends: 1292 [2021-03-10 22:09:08,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-03-10 22:09:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 841. [2021-03-10 22:09:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.4511904761904764) internal successors, (2899), 840 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2899 transitions. [2021-03-10 22:09:08,159 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2899 transitions. Word has length 20 [2021-03-10 22:09:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:08,159 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2899 transitions. [2021-03-10 22:09:08,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2899 transitions. [2021-03-10 22:09:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:08,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:08,160 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:08,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4897,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:08,360 INFO L428 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:08,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1990759516, now seen corresponding path program 422 times [2021-03-10 22:09:08,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:08,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834095925] [2021-03-10 22:09:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:08,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834095925] [2021-03-10 22:09:08,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078787780] [2021-03-10 22:09:08,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:08,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:08,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:08,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:08,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:08,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:08,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:08,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298996141] [2021-03-10 22:09:08,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:08,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:08,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:08,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:08,619 INFO L87 Difference]: Start difference. First operand 841 states and 2899 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:09,426 INFO L93 Difference]: Finished difference Result 1406 states and 4414 transitions. [2021-03-10 22:09:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:09:09,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:09,428 INFO L225 Difference]: With dead ends: 1406 [2021-03-10 22:09:09,428 INFO L226 Difference]: Without dead ends: 1406 [2021-03-10 22:09:09,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 672.3ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:09:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-03-10 22:09:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 847. [2021-03-10 22:09:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.4491725768321513) internal successors, (2918), 846 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2918 transitions. [2021-03-10 22:09:09,439 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2918 transitions. Word has length 20 [2021-03-10 22:09:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:09,439 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 2918 transitions. [2021-03-10 22:09:09,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2918 transitions. [2021-03-10 22:09:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:09,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:09,440 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:09,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4901,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:09,641 INFO L428 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1595849562, now seen corresponding path program 423 times [2021-03-10 22:09:09,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:09,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048499475] [2021-03-10 22:09:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:09,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048499475] [2021-03-10 22:09:09,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650163581] [2021-03-10 22:09:09,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:09,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:09,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:09,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:09,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:09,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:09,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018397119] [2021-03-10 22:09:09,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:09,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:09,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:09,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:09,890 INFO L87 Difference]: Start difference. First operand 847 states and 2918 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:11,356 INFO L93 Difference]: Finished difference Result 1589 states and 4876 transitions. [2021-03-10 22:09:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:09:11,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:11,358 INFO L225 Difference]: With dead ends: 1589 [2021-03-10 22:09:11,359 INFO L226 Difference]: Without dead ends: 1589 [2021-03-10 22:09:11,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1292.5ms TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:09:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-03-10 22:09:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 842. [2021-03-10 22:09:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.4613555291319855) internal successors, (2911), 841 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2911 transitions. [2021-03-10 22:09:11,371 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2911 transitions. Word has length 20 [2021-03-10 22:09:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:11,372 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2911 transitions. [2021-03-10 22:09:11,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2911 transitions. [2021-03-10 22:09:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:11,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:11,373 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:11,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4906 [2021-03-10 22:09:11,573 INFO L428 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash 655741044, now seen corresponding path program 424 times [2021-03-10 22:09:11,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:11,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501918965] [2021-03-10 22:09:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:11,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501918965] [2021-03-10 22:09:11,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005833881] [2021-03-10 22:09:11,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:11,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:11,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:11,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:11,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:11,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408367867] [2021-03-10 22:09:11,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:11,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:11,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:11,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:11,891 INFO L87 Difference]: Start difference. First operand 842 states and 2911 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:12,232 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 22:09:12,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:12,555 INFO L93 Difference]: Finished difference Result 1349 states and 4288 transitions. [2021-03-10 22:09:12,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:09:12,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:12,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:12,557 INFO L225 Difference]: With dead ends: 1349 [2021-03-10 22:09:12,557 INFO L226 Difference]: Without dead ends: 1324 [2021-03-10 22:09:12,557 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 670.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:09:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-03-10 22:09:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 838. [2021-03-10 22:09:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.4611708482676224) internal successors, (2897), 837 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2897 transitions. [2021-03-10 22:09:12,573 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2897 transitions. Word has length 20 [2021-03-10 22:09:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:12,573 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 2897 transitions. [2021-03-10 22:09:12,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2897 transitions. [2021-03-10 22:09:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:12,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:12,574 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:12,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4912,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:12,775 INFO L428 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash 973863644, now seen corresponding path program 425 times [2021-03-10 22:09:12,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:12,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548201675] [2021-03-10 22:09:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:12,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548201675] [2021-03-10 22:09:12,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551864744] [2021-03-10 22:09:12,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:12,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:12,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:12,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:12,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:13,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:13,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:13,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724153665] [2021-03-10 22:09:13,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:13,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:13,010 INFO L87 Difference]: Start difference. First operand 838 states and 2897 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:13,462 INFO L93 Difference]: Finished difference Result 1433 states and 4531 transitions. [2021-03-10 22:09:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:13,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:13,464 INFO L225 Difference]: With dead ends: 1433 [2021-03-10 22:09:13,464 INFO L226 Difference]: Without dead ends: 1433 [2021-03-10 22:09:13,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:13,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-03-10 22:09:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 844. [2021-03-10 22:09:13,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.465005931198102) internal successors, (2921), 843 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2921 transitions. [2021-03-10 22:09:13,475 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2921 transitions. Word has length 20 [2021-03-10 22:09:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:13,476 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 2921 transitions. [2021-03-10 22:09:13,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2921 transitions. [2021-03-10 22:09:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:13,477 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:13,477 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:13,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4919 [2021-03-10 22:09:13,677 INFO L428 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:13,677 INFO L82 PathProgramCache]: Analyzing trace with hash 58849244, now seen corresponding path program 426 times [2021-03-10 22:09:13,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:13,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690444793] [2021-03-10 22:09:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:13,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690444793] [2021-03-10 22:09:13,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440463745] [2021-03-10 22:09:13,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:13,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:09:13,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:13,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:13,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:13,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:13,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179013947] [2021-03-10 22:09:13,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:13,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:13,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:13,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:13,950 INFO L87 Difference]: Start difference. First operand 844 states and 2921 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:14,427 INFO L93 Difference]: Finished difference Result 1357 states and 4346 transitions. [2021-03-10 22:09:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:14,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:14,429 INFO L225 Difference]: With dead ends: 1357 [2021-03-10 22:09:14,429 INFO L226 Difference]: Without dead ends: 1357 [2021-03-10 22:09:14,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-03-10 22:09:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 847. [2021-03-10 22:09:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.4704491725768323) internal successors, (2936), 846 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2936 transitions. [2021-03-10 22:09:14,440 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2936 transitions. Word has length 20 [2021-03-10 22:09:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:14,440 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 2936 transitions. [2021-03-10 22:09:14,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2936 transitions. [2021-03-10 22:09:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:14,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:14,441 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:14,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4924 [2021-03-10 22:09:14,641 INFO L428 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -707996904, now seen corresponding path program 427 times [2021-03-10 22:09:14,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:14,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784747673] [2021-03-10 22:09:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:14,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784747673] [2021-03-10 22:09:14,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646255768] [2021-03-10 22:09:14,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:14,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:14,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:14,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:14,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:14,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523802489] [2021-03-10 22:09:14,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:14,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:14,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:14,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:14,925 INFO L87 Difference]: Start difference. First operand 847 states and 2936 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:15,529 INFO L93 Difference]: Finished difference Result 1389 states and 4427 transitions. [2021-03-10 22:09:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:15,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:15,531 INFO L225 Difference]: With dead ends: 1389 [2021-03-10 22:09:15,531 INFO L226 Difference]: Without dead ends: 1389 [2021-03-10 22:09:15,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 508.1ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:09:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-03-10 22:09:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 850. [2021-03-10 22:09:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.47585394581861) internal successors, (2951), 849 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2951 transitions. [2021-03-10 22:09:15,543 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2951 transitions. Word has length 20 [2021-03-10 22:09:15,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:15,543 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 2951 transitions. [2021-03-10 22:09:15,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2951 transitions. [2021-03-10 22:09:15,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:15,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:15,544 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:15,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4928 [2021-03-10 22:09:15,744 INFO L428 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:15,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1629833436, now seen corresponding path program 428 times [2021-03-10 22:09:15,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:15,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479810142] [2021-03-10 22:09:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:15,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479810142] [2021-03-10 22:09:15,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687639744] [2021-03-10 22:09:15,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:15,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:15,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:15,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:15,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:16,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:16,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:16,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139681050] [2021-03-10 22:09:16,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:16,029 INFO L87 Difference]: Start difference. First operand 850 states and 2951 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:16,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:16,480 INFO L93 Difference]: Finished difference Result 1356 states and 4350 transitions. [2021-03-10 22:09:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:16,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:16,482 INFO L225 Difference]: With dead ends: 1356 [2021-03-10 22:09:16,482 INFO L226 Difference]: Without dead ends: 1356 [2021-03-10 22:09:16,482 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-03-10 22:09:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 838. [2021-03-10 22:09:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.4611708482676224) internal successors, (2897), 837 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2897 transitions. [2021-03-10 22:09:16,493 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2897 transitions. Word has length 20 [2021-03-10 22:09:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:16,493 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 2897 transitions. [2021-03-10 22:09:16,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2897 transitions. [2021-03-10 22:09:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:16,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:16,494 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:16,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4935 [2021-03-10 22:09:16,694 INFO L428 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash 819892878, now seen corresponding path program 429 times [2021-03-10 22:09:16,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:16,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651237256] [2021-03-10 22:09:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:16,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651237256] [2021-03-10 22:09:16,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694429666] [2021-03-10 22:09:16,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:16,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:16,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:16,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:16,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:16,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:16,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:16,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815334054] [2021-03-10 22:09:16,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:16,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:16,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:16,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:16,951 INFO L87 Difference]: Start difference. First operand 838 states and 2897 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:17,701 INFO L93 Difference]: Finished difference Result 1455 states and 4566 transitions. [2021-03-10 22:09:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:09:17,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:17,703 INFO L225 Difference]: With dead ends: 1455 [2021-03-10 22:09:17,703 INFO L226 Difference]: Without dead ends: 1455 [2021-03-10 22:09:17,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 630.8ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:09:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-03-10 22:09:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 845. [2021-03-10 22:09:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.462085308056872) internal successors, (2922), 844 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2922 transitions. [2021-03-10 22:09:17,715 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2922 transitions. Word has length 20 [2021-03-10 22:09:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:17,715 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2922 transitions. [2021-03-10 22:09:17,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2922 transitions. [2021-03-10 22:09:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:17,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:17,716 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:17,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4941,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:17,916 INFO L428 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:17,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1528251096, now seen corresponding path program 430 times [2021-03-10 22:09:17,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:17,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323864441] [2021-03-10 22:09:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:17,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323864441] [2021-03-10 22:09:17,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456197199] [2021-03-10 22:09:17,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:18,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:18,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:18,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:18,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599623102] [2021-03-10 22:09:18,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:18,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:18,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:18,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:18,204 INFO L87 Difference]: Start difference. First operand 845 states and 2922 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:19,372 INFO L93 Difference]: Finished difference Result 1543 states and 4800 transitions. [2021-03-10 22:09:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:09:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:19,375 INFO L225 Difference]: With dead ends: 1543 [2021-03-10 22:09:19,375 INFO L226 Difference]: Without dead ends: 1543 [2021-03-10 22:09:19,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1034.1ms TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:09:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-03-10 22:09:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 839. [2021-03-10 22:09:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.464200477326969) internal successors, (2903), 838 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2903 transitions. [2021-03-10 22:09:19,388 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2903 transitions. Word has length 20 [2021-03-10 22:09:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:19,388 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 2903 transitions. [2021-03-10 22:09:19,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:19,388 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2903 transitions. [2021-03-10 22:09:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:19,389 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:19,389 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:19,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4945,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:19,589 INFO L428 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash -641746940, now seen corresponding path program 431 times [2021-03-10 22:09:19,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:19,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483368330] [2021-03-10 22:09:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:19,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483368330] [2021-03-10 22:09:19,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998091319] [2021-03-10 22:09:19,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:19,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:19,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:19,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:19,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:19,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881168054] [2021-03-10 22:09:19,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:19,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:19,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:19,971 INFO L87 Difference]: Start difference. First operand 839 states and 2903 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:20,404 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 22:09:20,768 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 22:09:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:20,945 INFO L93 Difference]: Finished difference Result 1357 states and 4316 transitions. [2021-03-10 22:09:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:20,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:20,947 INFO L225 Difference]: With dead ends: 1357 [2021-03-10 22:09:20,948 INFO L226 Difference]: Without dead ends: 1343 [2021-03-10 22:09:20,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1000.5ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-03-10 22:09:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 837. [2021-03-10 22:09:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.4617224880382773) internal successors, (2894), 836 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2894 transitions. [2021-03-10 22:09:20,958 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2894 transitions. Word has length 20 [2021-03-10 22:09:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:20,958 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 2894 transitions. [2021-03-10 22:09:20,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2894 transitions. [2021-03-10 22:09:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:20,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:20,960 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:21,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4952,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:21,174 INFO L428 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:21,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1656497320, now seen corresponding path program 432 times [2021-03-10 22:09:21,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:21,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065286600] [2021-03-10 22:09:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:21,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065286600] [2021-03-10 22:09:21,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775376670] [2021-03-10 22:09:21,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:21,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:09:21,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:21,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:21,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:21,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:21,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020467372] [2021-03-10 22:09:21,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:21,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:21,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:21,463 INFO L87 Difference]: Start difference. First operand 837 states and 2894 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:22,072 INFO L93 Difference]: Finished difference Result 1372 states and 4375 transitions. [2021-03-10 22:09:22,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:22,074 INFO L225 Difference]: With dead ends: 1372 [2021-03-10 22:09:22,074 INFO L226 Difference]: Without dead ends: 1372 [2021-03-10 22:09:22,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:09:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-03-10 22:09:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 840. [2021-03-10 22:09:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.467222884386174) internal successors, (2909), 839 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2909 transitions. [2021-03-10 22:09:22,085 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2909 transitions. Word has length 20 [2021-03-10 22:09:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:22,085 INFO L480 AbstractCegarLoop]: Abstraction has 840 states and 2909 transitions. [2021-03-10 22:09:22,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2909 transitions. [2021-03-10 22:09:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:22,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:22,086 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:22,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4959 [2021-03-10 22:09:22,287 INFO L428 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash -473731240, now seen corresponding path program 433 times [2021-03-10 22:09:22,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:22,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531249292] [2021-03-10 22:09:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:22,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531249292] [2021-03-10 22:09:22,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578741776] [2021-03-10 22:09:22,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:22,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:22,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:22,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:22,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:22,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876226806] [2021-03-10 22:09:22,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:22,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:22,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:22,585 INFO L87 Difference]: Start difference. First operand 840 states and 2909 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:23,316 INFO L93 Difference]: Finished difference Result 1403 states and 4460 transitions. [2021-03-10 22:09:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:23,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:23,318 INFO L225 Difference]: With dead ends: 1403 [2021-03-10 22:09:23,318 INFO L226 Difference]: Without dead ends: 1403 [2021-03-10 22:09:23,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 640.4ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:09:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-03-10 22:09:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 843. [2021-03-10 22:09:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.472684085510689) internal successors, (2924), 842 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2924 transitions. [2021-03-10 22:09:23,328 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2924 transitions. Word has length 20 [2021-03-10 22:09:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:23,328 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 2924 transitions. [2021-03-10 22:09:23,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2924 transitions. [2021-03-10 22:09:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:23,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:23,329 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:23,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4964 [2021-03-10 22:09:23,530 INFO L428 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1864099100, now seen corresponding path program 434 times [2021-03-10 22:09:23,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:23,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518592039] [2021-03-10 22:09:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:23,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518592039] [2021-03-10 22:09:23,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328439205] [2021-03-10 22:09:23,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:23,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:23,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:23,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:23,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:23,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006137482] [2021-03-10 22:09:23,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:23,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:23,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:23,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:23,815 INFO L87 Difference]: Start difference. First operand 843 states and 2924 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:24,435 INFO L93 Difference]: Finished difference Result 1360 states and 4357 transitions. [2021-03-10 22:09:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:24,437 INFO L225 Difference]: With dead ends: 1360 [2021-03-10 22:09:24,437 INFO L226 Difference]: Without dead ends: 1360 [2021-03-10 22:09:24,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:09:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-03-10 22:09:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 837. [2021-03-10 22:09:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.4617224880382773) internal successors, (2894), 836 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2894 transitions. [2021-03-10 22:09:24,448 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2894 transitions. Word has length 20 [2021-03-10 22:09:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:24,448 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 2894 transitions. [2021-03-10 22:09:24,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2894 transitions. [2021-03-10 22:09:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:24,449 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:24,449 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:24,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4971,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:24,649 INFO L428 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:24,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1335697110, now seen corresponding path program 435 times [2021-03-10 22:09:24,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:24,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733812783] [2021-03-10 22:09:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733812783] [2021-03-10 22:09:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609703171] [2021-03-10 22:09:24,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:24,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:24,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:24,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:24,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:24,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:24,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853202893] [2021-03-10 22:09:24,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:24,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:24,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:24,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:24,954 INFO L87 Difference]: Start difference. First operand 837 states and 2894 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:26,343 INFO L93 Difference]: Finished difference Result 1621 states and 4976 transitions. [2021-03-10 22:09:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:09:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:26,346 INFO L225 Difference]: With dead ends: 1621 [2021-03-10 22:09:26,346 INFO L226 Difference]: Without dead ends: 1621 [2021-03-10 22:09:26,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1290.3ms TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:09:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-03-10 22:09:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 839. [2021-03-10 22:09:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.467780429594272) internal successors, (2906), 838 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2906 transitions. [2021-03-10 22:09:26,363 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2906 transitions. Word has length 20 [2021-03-10 22:09:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:26,363 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 2906 transitions. [2021-03-10 22:09:26,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2906 transitions. [2021-03-10 22:09:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:26,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:26,364 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:26,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4978 [2021-03-10 22:09:26,565 INFO L428 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash 279721204, now seen corresponding path program 436 times [2021-03-10 22:09:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:26,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828779587] [2021-03-10 22:09:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:26,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828779587] [2021-03-10 22:09:26,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797235554] [2021-03-10 22:09:26,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:26,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:26,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:26,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:26,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:27,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:27,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:27,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791494726] [2021-03-10 22:09:27,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:27,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:27,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:27,038 INFO L87 Difference]: Start difference. First operand 839 states and 2906 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:27,475 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:09:27,760 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:09:27,895 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:09:28,249 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:09:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:28,266 INFO L93 Difference]: Finished difference Result 1437 states and 4507 transitions. [2021-03-10 22:09:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:28,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:28,269 INFO L225 Difference]: With dead ends: 1437 [2021-03-10 22:09:28,269 INFO L226 Difference]: Without dead ends: 1430 [2021-03-10 22:09:28,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1270.0ms TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:09:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-03-10 22:09:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 851. [2021-03-10 22:09:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.46) internal successors, (2941), 850 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2941 transitions. [2021-03-10 22:09:28,281 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2941 transitions. Word has length 20 [2021-03-10 22:09:28,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:28,281 INFO L480 AbstractCegarLoop]: Abstraction has 851 states and 2941 transitions. [2021-03-10 22:09:28,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2941 transitions. [2021-03-10 22:09:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:28,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:28,282 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:28,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4986,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:28,482 INFO L428 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1647343268, now seen corresponding path program 437 times [2021-03-10 22:09:28,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:28,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848507858] [2021-03-10 22:09:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:28,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848507858] [2021-03-10 22:09:28,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860520257] [2021-03-10 22:09:28,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:28,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:28,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:28,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:28,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:28,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:28,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175907513] [2021-03-10 22:09:28,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:28,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:28,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:28,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:28,905 INFO L87 Difference]: Start difference. First operand 851 states and 2941 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:29,407 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 22:09:29,526 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:09:29,666 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:09:29,802 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:09:30,021 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:09:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:30,052 INFO L93 Difference]: Finished difference Result 1354 states and 4320 transitions. [2021-03-10 22:09:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:30,055 INFO L225 Difference]: With dead ends: 1354 [2021-03-10 22:09:30,055 INFO L226 Difference]: Without dead ends: 1354 [2021-03-10 22:09:30,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1123.4ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-03-10 22:09:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 849. [2021-03-10 22:09:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4622641509433962) internal successors, (2936), 848 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2936 transitions. [2021-03-10 22:09:30,066 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2936 transitions. Word has length 20 [2021-03-10 22:09:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:30,066 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 2936 transitions. [2021-03-10 22:09:30,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2936 transitions. [2021-03-10 22:09:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:30,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:30,067 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:30,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4998,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:30,268 INFO L428 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:30,268 INFO L82 PathProgramCache]: Analyzing trace with hash -584296672, now seen corresponding path program 438 times [2021-03-10 22:09:30,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:30,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633434182] [2021-03-10 22:09:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:30,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633434182] [2021-03-10 22:09:30,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013014087] [2021-03-10 22:09:30,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:30,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:09:30,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:30,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:30,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:30,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:30,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:30,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863072190] [2021-03-10 22:09:30,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:30,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:30,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:30,573 INFO L87 Difference]: Start difference. First operand 849 states and 2936 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:31,798 INFO L93 Difference]: Finished difference Result 1523 states and 4770 transitions. [2021-03-10 22:09:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:09:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:31,801 INFO L225 Difference]: With dead ends: 1523 [2021-03-10 22:09:31,801 INFO L226 Difference]: Without dead ends: 1523 [2021-03-10 22:09:31,801 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1064.9ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:09:31,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-03-10 22:09:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 852. [2021-03-10 22:09:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4676850763807288) internal successors, (2951), 851 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2951 transitions. [2021-03-10 22:09:31,813 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2951 transitions. Word has length 20 [2021-03-10 22:09:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:31,813 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2951 transitions. [2021-03-10 22:09:31,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2951 transitions. [2021-03-10 22:09:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:31,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:31,814 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:32,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5008,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:32,015 INFO L428 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:32,015 INFO L82 PathProgramCache]: Analyzing trace with hash 708045728, now seen corresponding path program 439 times [2021-03-10 22:09:32,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:32,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537926494] [2021-03-10 22:09:32,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:32,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537926494] [2021-03-10 22:09:32,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710344899] [2021-03-10 22:09:32,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:32,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:32,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:32,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:32,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669777466] [2021-03-10 22:09:32,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:32,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:32,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:32,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:32,291 INFO L87 Difference]: Start difference. First operand 852 states and 2951 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:33,277 INFO L93 Difference]: Finished difference Result 1492 states and 4703 transitions. [2021-03-10 22:09:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:09:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:33,280 INFO L225 Difference]: With dead ends: 1492 [2021-03-10 22:09:33,280 INFO L226 Difference]: Without dead ends: 1492 [2021-03-10 22:09:33,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 916.3ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:09:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-10 22:09:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 849. [2021-03-10 22:09:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4622641509433962) internal successors, (2936), 848 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2936 transitions. [2021-03-10 22:09:33,292 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2936 transitions. Word has length 20 [2021-03-10 22:09:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:33,292 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 2936 transitions. [2021-03-10 22:09:33,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2936 transitions. [2021-03-10 22:09:33,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:33,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:33,293 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:33,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5016,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:33,494 INFO L428 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:33,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash -563560144, now seen corresponding path program 440 times [2021-03-10 22:09:33,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:33,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133166353] [2021-03-10 22:09:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:33,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133166353] [2021-03-10 22:09:33,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706978030] [2021-03-10 22:09:33,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:33,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:33,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:33,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:33,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:33,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:33,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:33,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289442995] [2021-03-10 22:09:33,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:33,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:33,784 INFO L87 Difference]: Start difference. First operand 849 states and 2936 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:34,196 INFO L93 Difference]: Finished difference Result 1286 states and 4151 transitions. [2021-03-10 22:09:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:34,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:34,198 INFO L225 Difference]: With dead ends: 1286 [2021-03-10 22:09:34,198 INFO L226 Difference]: Without dead ends: 1280 [2021-03-10 22:09:34,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:34,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-03-10 22:09:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 859. [2021-03-10 22:09:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.453379953379953) internal successors, (2963), 858 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2963 transitions. [2021-03-10 22:09:34,208 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2963 transitions. Word has length 20 [2021-03-10 22:09:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:34,209 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 2963 transitions. [2021-03-10 22:09:34,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2963 transitions. [2021-03-10 22:09:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:34,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:34,210 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:34,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 469 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5024 [2021-03-10 22:09:34,410 INFO L428 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:34,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1815983226, now seen corresponding path program 441 times [2021-03-10 22:09:34,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:34,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518732201] [2021-03-10 22:09:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:34,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518732201] [2021-03-10 22:09:34,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868109239] [2021-03-10 22:09:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:34,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:09:34,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:34,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:34,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:34,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:34,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60502438] [2021-03-10 22:09:34,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:34,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:34,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:34,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:34,722 INFO L87 Difference]: Start difference. First operand 859 states and 2963 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:35,321 INFO L93 Difference]: Finished difference Result 1376 states and 4379 transitions. [2021-03-10 22:09:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:09:35,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:35,323 INFO L225 Difference]: With dead ends: 1376 [2021-03-10 22:09:35,323 INFO L226 Difference]: Without dead ends: 1376 [2021-03-10 22:09:35,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 540.3ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:09:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-03-10 22:09:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 857. [2021-03-10 22:09:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.455607476635514) internal successors, (2958), 856 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2958 transitions. [2021-03-10 22:09:35,334 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2958 transitions. Word has length 20 [2021-03-10 22:09:35,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:35,334 INFO L480 AbstractCegarLoop]: Abstraction has 857 states and 2958 transitions. [2021-03-10 22:09:35,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2958 transitions. [2021-03-10 22:09:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:35,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:35,335 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:35,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5031 [2021-03-10 22:09:35,535 INFO L428 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:35,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1556371972, now seen corresponding path program 442 times [2021-03-10 22:09:35,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:35,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953246503] [2021-03-10 22:09:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:35,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953246503] [2021-03-10 22:09:35,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062642004] [2021-03-10 22:09:35,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:35,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:35,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:35,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:35,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:35,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:35,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616061945] [2021-03-10 22:09:35,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:35,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:35,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:35,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:35,926 INFO L87 Difference]: Start difference. First operand 857 states and 2958 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:36,391 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 22:09:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:36,717 INFO L93 Difference]: Finished difference Result 1324 states and 4260 transitions. [2021-03-10 22:09:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:36,718 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:36,720 INFO L225 Difference]: With dead ends: 1324 [2021-03-10 22:09:36,720 INFO L226 Difference]: Without dead ends: 1324 [2021-03-10 22:09:36,720 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 779.1ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-03-10 22:09:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 843. [2021-03-10 22:09:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.451306413301663) internal successors, (2906), 842 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2906 transitions. [2021-03-10 22:09:36,731 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2906 transitions. Word has length 20 [2021-03-10 22:09:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:36,731 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 2906 transitions. [2021-03-10 22:09:36,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2906 transitions. [2021-03-10 22:09:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:36,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:36,732 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:36,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5038,471 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:36,932 INFO L428 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:36,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358622, now seen corresponding path program 443 times [2021-03-10 22:09:36,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:36,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116796762] [2021-03-10 22:09:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:36,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116796762] [2021-03-10 22:09:36,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263254383] [2021-03-10 22:09:36,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:37,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:37,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:37,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:37,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:37,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:37,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813013893] [2021-03-10 22:09:37,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:37,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:37,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:37,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:37,192 INFO L87 Difference]: Start difference. First operand 843 states and 2906 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:37,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:37,561 INFO L93 Difference]: Finished difference Result 1172 states and 3797 transitions. [2021-03-10 22:09:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:09:37,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:37,563 INFO L225 Difference]: With dead ends: 1172 [2021-03-10 22:09:37,564 INFO L226 Difference]: Without dead ends: 1147 [2021-03-10 22:09:37,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-03-10 22:09:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 843. [2021-03-10 22:09:37,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.446555819477435) internal successors, (2902), 842 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2902 transitions. [2021-03-10 22:09:37,573 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2902 transitions. Word has length 20 [2021-03-10 22:09:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:37,573 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 2902 transitions. [2021-03-10 22:09:37,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:37,573 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2902 transitions. [2021-03-10 22:09:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:37,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:37,574 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:37,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5049,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:37,775 INFO L428 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:37,775 INFO L82 PathProgramCache]: Analyzing trace with hash 285793542, now seen corresponding path program 444 times [2021-03-10 22:09:37,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:37,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846527501] [2021-03-10 22:09:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:37,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846527501] [2021-03-10 22:09:37,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894616961] [2021-03-10 22:09:37,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:37,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:09:37,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:37,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:37,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:38,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:38,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:38,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989113985] [2021-03-10 22:09:38,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:38,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:38,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:38,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:38,070 INFO L87 Difference]: Start difference. First operand 843 states and 2902 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:38,570 INFO L93 Difference]: Finished difference Result 1194 states and 3832 transitions. [2021-03-10 22:09:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:09:38,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:38,573 INFO L225 Difference]: With dead ends: 1194 [2021-03-10 22:09:38,573 INFO L226 Difference]: Without dead ends: 1180 [2021-03-10 22:09:38,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 479.5ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-03-10 22:09:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 843. [2021-03-10 22:09:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.4441805225653206) internal successors, (2900), 842 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2900 transitions. [2021-03-10 22:09:38,583 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2900 transitions. Word has length 20 [2021-03-10 22:09:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:38,583 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 2900 transitions. [2021-03-10 22:09:38,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2900 transitions. [2021-03-10 22:09:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:38,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:38,584 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:38,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5055,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:38,785 INFO L428 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1516520582, now seen corresponding path program 445 times [2021-03-10 22:09:38,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:38,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132016199] [2021-03-10 22:09:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:38,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132016199] [2021-03-10 22:09:38,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332064788] [2021-03-10 22:09:38,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:38,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:39,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:39,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:39,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893020260] [2021-03-10 22:09:39,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:39,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:39,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:39,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:39,091 INFO L87 Difference]: Start difference. First operand 843 states and 2900 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:39,534 INFO L93 Difference]: Finished difference Result 1155 states and 3759 transitions. [2021-03-10 22:09:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:39,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:39,536 INFO L225 Difference]: With dead ends: 1155 [2021-03-10 22:09:39,536 INFO L226 Difference]: Without dead ends: 1155 [2021-03-10 22:09:39,536 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-03-10 22:09:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 837. [2021-03-10 22:09:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.4485645933014353) internal successors, (2883), 836 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2883 transitions. [2021-03-10 22:09:39,545 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2883 transitions. Word has length 20 [2021-03-10 22:09:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:39,545 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 2883 transitions. [2021-03-10 22:09:39,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2883 transitions. [2021-03-10 22:09:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:39,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:39,546 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:39,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5061 [2021-03-10 22:09:39,747 INFO L428 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:39,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:39,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1713358892, now seen corresponding path program 446 times [2021-03-10 22:09:39,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:39,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482486178] [2021-03-10 22:09:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482486178] [2021-03-10 22:09:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196666690] [2021-03-10 22:09:39,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:39,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:39,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:39,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:40,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:40,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:40,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93074005] [2021-03-10 22:09:40,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:40,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:40,025 INFO L87 Difference]: Start difference. First operand 837 states and 2883 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:40,576 INFO L93 Difference]: Finished difference Result 1174 states and 3779 transitions. [2021-03-10 22:09:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:40,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:40,578 INFO L225 Difference]: With dead ends: 1174 [2021-03-10 22:09:40,579 INFO L226 Difference]: Without dead ends: 1167 [2021-03-10 22:09:40,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-03-10 22:09:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 848. [2021-03-10 22:09:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.43801652892562) internal successors, (2912), 847 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2912 transitions. [2021-03-10 22:09:40,589 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2912 transitions. Word has length 20 [2021-03-10 22:09:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:40,589 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 2912 transitions. [2021-03-10 22:09:40,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:40,589 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2912 transitions. [2021-03-10 22:09:40,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:40,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:40,590 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:40,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5068,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:40,790 INFO L428 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:40,791 INFO L82 PathProgramCache]: Analyzing trace with hash 946512744, now seen corresponding path program 447 times [2021-03-10 22:09:40,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:40,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647786988] [2021-03-10 22:09:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:40,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647786988] [2021-03-10 22:09:40,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19876184] [2021-03-10 22:09:40,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:40,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:40,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:40,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:41,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:41,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:41,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106439467] [2021-03-10 22:09:41,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:41,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:41,071 INFO L87 Difference]: Start difference. First operand 848 states and 2912 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:41,503 INFO L93 Difference]: Finished difference Result 1176 states and 3784 transitions. [2021-03-10 22:09:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:09:41,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:41,506 INFO L225 Difference]: With dead ends: 1176 [2021-03-10 22:09:41,506 INFO L226 Difference]: Without dead ends: 1176 [2021-03-10 22:09:41,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-03-10 22:09:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 835. [2021-03-10 22:09:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.448441247002398) internal successors, (2876), 834 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2876 transitions. [2021-03-10 22:09:41,516 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2876 transitions. Word has length 20 [2021-03-10 22:09:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:41,516 INFO L480 AbstractCegarLoop]: Abstraction has 835 states and 2876 transitions. [2021-03-10 22:09:41,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2876 transitions. [2021-03-10 22:09:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:41,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:41,517 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:41,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5074 [2021-03-10 22:09:41,717 INFO L428 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash -501136808, now seen corresponding path program 448 times [2021-03-10 22:09:41,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:41,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129173896] [2021-03-10 22:09:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:41,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129173896] [2021-03-10 22:09:41,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808275923] [2021-03-10 22:09:41,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:41,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:41,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:41,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:41,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:41,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:41,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:41,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:09:41,950 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-03-10 22:09:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:41,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:41,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:41,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23051981] [2021-03-10 22:09:41,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:41,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:41,992 INFO L87 Difference]: Start difference. First operand 835 states and 2876 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:42,404 INFO L93 Difference]: Finished difference Result 1243 states and 3943 transitions. [2021-03-10 22:09:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:09:42,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:42,406 INFO L225 Difference]: With dead ends: 1243 [2021-03-10 22:09:42,406 INFO L226 Difference]: Without dead ends: 1236 [2021-03-10 22:09:42,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-03-10 22:09:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 850. [2021-03-10 22:09:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.435806831566549) internal successors, (2917), 849 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2917 transitions. [2021-03-10 22:09:42,417 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2917 transitions. Word has length 20 [2021-03-10 22:09:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:42,417 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 2917 transitions. [2021-03-10 22:09:42,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2917 transitions. [2021-03-10 22:09:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:42,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:42,418 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:42,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5080,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:42,618 INFO L428 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1267982956, now seen corresponding path program 449 times [2021-03-10 22:09:42,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:42,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109386832] [2021-03-10 22:09:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:42,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109386832] [2021-03-10 22:09:42,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644307355] [2021-03-10 22:09:42,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:42,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:42,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:42,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:42,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:42,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:42,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:42,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:42,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:42,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:09:42,830 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-03-10 22:09:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:42,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:42,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:42,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590566859] [2021-03-10 22:09:42,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:42,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:42,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:42,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:42,862 INFO L87 Difference]: Start difference. First operand 850 states and 2917 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:43,321 INFO L93 Difference]: Finished difference Result 1271 states and 4002 transitions. [2021-03-10 22:09:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:43,324 INFO L225 Difference]: With dead ends: 1271 [2021-03-10 22:09:43,324 INFO L226 Difference]: Without dead ends: 1271 [2021-03-10 22:09:43,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-03-10 22:09:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 848. [2021-03-10 22:09:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.43801652892562) internal successors, (2912), 847 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2912 transitions. [2021-03-10 22:09:43,335 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2912 transitions. Word has length 20 [2021-03-10 22:09:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:43,335 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 2912 transitions. [2021-03-10 22:09:43,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2912 transitions. [2021-03-10 22:09:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:43,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:43,336 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:43,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5088 [2021-03-10 22:09:43,537 INFO L428 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash -92492312, now seen corresponding path program 450 times [2021-03-10 22:09:43,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:43,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751821814] [2021-03-10 22:09:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:43,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751821814] [2021-03-10 22:09:43,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586342088] [2021-03-10 22:09:43,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:43,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:09:43,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:43,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:43,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:43,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:43,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:43,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:09:43,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-03-10 22:09:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:43,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:43,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:09:43,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366320118] [2021-03-10 22:09:43,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:09:43,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:43,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:09:43,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:09:43,793 INFO L87 Difference]: Start difference. First operand 848 states and 2912 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:44,156 INFO L93 Difference]: Finished difference Result 1212 states and 3888 transitions. [2021-03-10 22:09:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:44,159 INFO L225 Difference]: With dead ends: 1212 [2021-03-10 22:09:44,159 INFO L226 Difference]: Without dead ends: 1212 [2021-03-10 22:09:44,159 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-03-10 22:09:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 835. [2021-03-10 22:09:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.448441247002398) internal successors, (2876), 834 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2876 transitions. [2021-03-10 22:09:44,169 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2876 transitions. Word has length 20 [2021-03-10 22:09:44,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:44,170 INFO L480 AbstractCegarLoop]: Abstraction has 835 states and 2876 transitions. [2021-03-10 22:09:44,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2876 transitions. [2021-03-10 22:09:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:44,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:44,171 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:44,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5097 [2021-03-10 22:09:44,371 INFO L428 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash 167624360, now seen corresponding path program 451 times [2021-03-10 22:09:44,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:44,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406184194] [2021-03-10 22:09:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:44,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406184194] [2021-03-10 22:09:44,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965778929] [2021-03-10 22:09:44,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:44,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:44,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:44,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:44,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:09:44,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311107996] [2021-03-10 22:09:44,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:09:44,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:44,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:09:44,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:09:44,598 INFO L87 Difference]: Start difference. First operand 835 states and 2876 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:44,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:44,881 INFO L93 Difference]: Finished difference Result 1215 states and 3953 transitions. [2021-03-10 22:09:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:44,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:44,884 INFO L225 Difference]: With dead ends: 1215 [2021-03-10 22:09:44,884 INFO L226 Difference]: Without dead ends: 1215 [2021-03-10 22:09:44,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:44,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-03-10 22:09:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 830. [2021-03-10 22:09:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.447527141133896) internal successors, (2858), 829 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2858 transitions. [2021-03-10 22:09:44,894 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2858 transitions. Word has length 20 [2021-03-10 22:09:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:44,894 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 2858 transitions. [2021-03-10 22:09:44,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2858 transitions. [2021-03-10 22:09:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:44,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:44,895 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:45,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5104,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:45,095 INFO L428 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:45,096 INFO L82 PathProgramCache]: Analyzing trace with hash -747390040, now seen corresponding path program 452 times [2021-03-10 22:09:45,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:45,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098390375] [2021-03-10 22:09:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:45,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098390375] [2021-03-10 22:09:45,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069708986] [2021-03-10 22:09:45,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:45,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:45,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:45,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:45,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:45,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:45,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231900885] [2021-03-10 22:09:45,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:45,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:45,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:45,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:45,345 INFO L87 Difference]: Start difference. First operand 830 states and 2858 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:45,543 INFO L93 Difference]: Finished difference Result 1204 states and 3925 transitions. [2021-03-10 22:09:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:45,546 INFO L225 Difference]: With dead ends: 1204 [2021-03-10 22:09:45,546 INFO L226 Difference]: Without dead ends: 1204 [2021-03-10 22:09:45,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-03-10 22:09:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 829. [2021-03-10 22:09:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.449275362318841) internal successors, (2856), 828 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2856 transitions. [2021-03-10 22:09:45,556 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2856 transitions. Word has length 20 [2021-03-10 22:09:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:45,556 INFO L480 AbstractCegarLoop]: Abstraction has 829 states and 2856 transitions. [2021-03-10 22:09:45,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2856 transitions. [2021-03-10 22:09:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:45,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:45,557 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:45,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5107,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:45,758 INFO L428 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1514236188, now seen corresponding path program 453 times [2021-03-10 22:09:45,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:45,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817887034] [2021-03-10 22:09:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:45,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817887034] [2021-03-10 22:09:45,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672198515] [2021-03-10 22:09:45,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:45,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:46,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:46,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:46,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758317580] [2021-03-10 22:09:46,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:46,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:46,013 INFO L87 Difference]: Start difference. First operand 829 states and 2856 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:46,305 INFO L93 Difference]: Finished difference Result 1223 states and 3962 transitions. [2021-03-10 22:09:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:46,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:46,307 INFO L225 Difference]: With dead ends: 1223 [2021-03-10 22:09:46,307 INFO L226 Difference]: Without dead ends: 1223 [2021-03-10 22:09:46,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-03-10 22:09:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 828. [2021-03-10 22:09:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.447400241837969) internal successors, (2851), 827 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2851 transitions. [2021-03-10 22:09:46,318 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2851 transitions. Word has length 20 [2021-03-10 22:09:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:46,318 INFO L480 AbstractCegarLoop]: Abstraction has 828 states and 2851 transitions. [2021-03-10 22:09:46,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2851 transitions. [2021-03-10 22:09:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:46,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:46,319 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:46,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5111 [2021-03-10 22:09:46,520 INFO L428 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:46,520 INFO L82 PathProgramCache]: Analyzing trace with hash 823594152, now seen corresponding path program 454 times [2021-03-10 22:09:46,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:46,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884539594] [2021-03-10 22:09:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:46,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884539594] [2021-03-10 22:09:46,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083274820] [2021-03-10 22:09:46,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:46,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:46,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:46,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:46,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:46,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:46,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412999097] [2021-03-10 22:09:46,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:46,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:46,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:46,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:46,785 INFO L87 Difference]: Start difference. First operand 828 states and 2851 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:47,084 INFO L93 Difference]: Finished difference Result 1180 states and 3865 transitions. [2021-03-10 22:09:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:47,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:47,086 INFO L225 Difference]: With dead ends: 1180 [2021-03-10 22:09:47,086 INFO L226 Difference]: Without dead ends: 1180 [2021-03-10 22:09:47,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-03-10 22:09:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 808. [2021-03-10 22:09:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.4386617100371746) internal successors, (2775), 807 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2775 transitions. [2021-03-10 22:09:47,097 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2775 transitions. Word has length 20 [2021-03-10 22:09:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:47,097 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 2775 transitions. [2021-03-10 22:09:47,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2775 transitions. [2021-03-10 22:09:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:47,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:47,098 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:47,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5116,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:47,298 INFO L428 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:47,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2052769820, now seen corresponding path program 455 times [2021-03-10 22:09:47,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:47,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017639195] [2021-03-10 22:09:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:47,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017639195] [2021-03-10 22:09:47,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681363308] [2021-03-10 22:09:47,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:47,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:47,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:47,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:47,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:47,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:47,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:47,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133646314] [2021-03-10 22:09:47,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:47,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:47,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:47,538 INFO L87 Difference]: Start difference. First operand 808 states and 2775 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:47,792 INFO L93 Difference]: Finished difference Result 1158 states and 3782 transitions. [2021-03-10 22:09:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:47,794 INFO L225 Difference]: With dead ends: 1158 [2021-03-10 22:09:47,794 INFO L226 Difference]: Without dead ends: 1158 [2021-03-10 22:09:47,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-03-10 22:09:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 814. [2021-03-10 22:09:47,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4464944649446494) internal successors, (2802), 813 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2802 transitions. [2021-03-10 22:09:47,804 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2802 transitions. Word has length 20 [2021-03-10 22:09:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:47,804 INFO L480 AbstractCegarLoop]: Abstraction has 814 states and 2802 transitions. [2021-03-10 22:09:47,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2802 transitions. [2021-03-10 22:09:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:47,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:47,805 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:48,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5122 [2021-03-10 22:09:48,006 INFO L428 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:48,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1285923672, now seen corresponding path program 456 times [2021-03-10 22:09:48,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:48,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018388522] [2021-03-10 22:09:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:48,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018388522] [2021-03-10 22:09:48,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216498017] [2021-03-10 22:09:48,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:48,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:09:48,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:48,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:48,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:48,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:48,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762971288] [2021-03-10 22:09:48,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:48,260 INFO L87 Difference]: Start difference. First operand 814 states and 2802 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:48,557 INFO L93 Difference]: Finished difference Result 1200 states and 3889 transitions. [2021-03-10 22:09:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:48,559 INFO L225 Difference]: With dead ends: 1200 [2021-03-10 22:09:48,559 INFO L226 Difference]: Without dead ends: 1200 [2021-03-10 22:09:48,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-03-10 22:09:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 817. [2021-03-10 22:09:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.452205882352941) internal successors, (2817), 816 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2817 transitions. [2021-03-10 22:09:48,569 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2817 transitions. Word has length 20 [2021-03-10 22:09:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:48,569 INFO L480 AbstractCegarLoop]: Abstraction has 817 states and 2817 transitions. [2021-03-10 22:09:48,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2817 transitions. [2021-03-10 22:09:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:48,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:48,570 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:48,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5125,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:48,771 INFO L428 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:48,771 INFO L82 PathProgramCache]: Analyzing trace with hash -671213284, now seen corresponding path program 457 times [2021-03-10 22:09:48,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:48,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42900878] [2021-03-10 22:09:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:48,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42900878] [2021-03-10 22:09:48,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517609420] [2021-03-10 22:09:48,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:48,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:49,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:49,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:49,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015999346] [2021-03-10 22:09:49,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:49,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:49,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:49,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:49,006 INFO L87 Difference]: Start difference. First operand 817 states and 2817 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:49,280 INFO L93 Difference]: Finished difference Result 1167 states and 3812 transitions. [2021-03-10 22:09:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:49,282 INFO L225 Difference]: With dead ends: 1167 [2021-03-10 22:09:49,282 INFO L226 Difference]: Without dead ends: 1167 [2021-03-10 22:09:49,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-03-10 22:09:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 811. [2021-03-10 22:09:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.4407407407407407) internal successors, (2787), 810 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2787 transitions. [2021-03-10 22:09:49,291 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2787 transitions. Word has length 20 [2021-03-10 22:09:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:49,292 INFO L480 AbstractCegarLoop]: Abstraction has 811 states and 2787 transitions. [2021-03-10 22:09:49,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2787 transitions. [2021-03-10 22:09:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:49,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:49,292 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:49,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5130 [2021-03-10 22:09:49,493 INFO L428 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1833552980, now seen corresponding path program 458 times [2021-03-10 22:09:49,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:49,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32060857] [2021-03-10 22:09:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:49,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32060857] [2021-03-10 22:09:49,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178349944] [2021-03-10 22:09:49,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:49,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:49,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:49,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:49,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:49,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:49,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:09:49,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:49,716 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:09:49,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:09:49,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:09:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:49,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:49,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:49,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389838092] [2021-03-10 22:09:49,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:49,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:49,783 INFO L87 Difference]: Start difference. First operand 811 states and 2787 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:50,089 INFO L93 Difference]: Finished difference Result 1259 states and 4061 transitions. [2021-03-10 22:09:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:50,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:50,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:50,091 INFO L225 Difference]: With dead ends: 1259 [2021-03-10 22:09:50,091 INFO L226 Difference]: Without dead ends: 1259 [2021-03-10 22:09:50,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-03-10 22:09:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 817. [2021-03-10 22:09:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.448529411764706) internal successors, (2814), 816 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2814 transitions. [2021-03-10 22:09:50,102 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2814 transitions. Word has length 20 [2021-03-10 22:09:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:50,102 INFO L480 AbstractCegarLoop]: Abstraction has 817 states and 2814 transitions. [2021-03-10 22:09:50,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2814 transitions. [2021-03-10 22:09:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:50,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:50,103 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:50,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5136,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:50,303 INFO L428 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash 504277360, now seen corresponding path program 459 times [2021-03-10 22:09:50,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:50,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829696995] [2021-03-10 22:09:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:50,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829696995] [2021-03-10 22:09:50,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968232470] [2021-03-10 22:09:50,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:50,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:50,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:50,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:50,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:50,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:50,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:09:50,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,528 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:09:50,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:09:50,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:09:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:50,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:50,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:50,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427904792] [2021-03-10 22:09:50,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:50,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:50,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:50,587 INFO L87 Difference]: Start difference. First operand 817 states and 2814 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:50,935 INFO L93 Difference]: Finished difference Result 1265 states and 4076 transitions. [2021-03-10 22:09:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:50,937 INFO L225 Difference]: With dead ends: 1265 [2021-03-10 22:09:50,937 INFO L226 Difference]: Without dead ends: 1265 [2021-03-10 22:09:50,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-03-10 22:09:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 814. [2021-03-10 22:09:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4428044280442807) internal successors, (2799), 813 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2799 transitions. [2021-03-10 22:09:50,948 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2799 transitions. Word has length 20 [2021-03-10 22:09:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:50,948 INFO L480 AbstractCegarLoop]: Abstraction has 814 states and 2799 transitions. [2021-03-10 22:09:50,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2799 transitions. [2021-03-10 22:09:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:50,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:50,949 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:51,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5143 [2021-03-10 22:09:51,150 INFO L428 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2117844094, now seen corresponding path program 460 times [2021-03-10 22:09:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:51,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852553436] [2021-03-10 22:09:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:51,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852553436] [2021-03-10 22:09:51,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15297048] [2021-03-10 22:09:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:51,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:51,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:51,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:51,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:51,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:51,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:51,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:09:51,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:51,376 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:09:51,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:09:51,377 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:09:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:51,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:51,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:09:51,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43178530] [2021-03-10 22:09:51,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:09:51,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:51,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:09:51,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:09:51,420 INFO L87 Difference]: Start difference. First operand 814 states and 2799 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:51,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:51,707 INFO L93 Difference]: Finished difference Result 1223 states and 3969 transitions. [2021-03-10 22:09:51,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:09:51,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:51,709 INFO L225 Difference]: With dead ends: 1223 [2021-03-10 22:09:51,709 INFO L226 Difference]: Without dead ends: 1223 [2021-03-10 22:09:51,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-03-10 22:09:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 811. [2021-03-10 22:09:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.4407407407407407) internal successors, (2787), 810 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2787 transitions. [2021-03-10 22:09:51,720 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2787 transitions. Word has length 20 [2021-03-10 22:09:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:51,720 INFO L480 AbstractCegarLoop]: Abstraction has 811 states and 2787 transitions. [2021-03-10 22:09:51,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2787 transitions. [2021-03-10 22:09:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:51,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:51,721 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:51,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5150,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:51,921 INFO L428 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:51,921 INFO L82 PathProgramCache]: Analyzing trace with hash -255092834, now seen corresponding path program 461 times [2021-03-10 22:09:51,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:51,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008201157] [2021-03-10 22:09:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:52,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008201157] [2021-03-10 22:09:52,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541903304] [2021-03-10 22:09:52,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:52,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:52,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:52,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:52,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:52,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:52,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644202952] [2021-03-10 22:09:52,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:52,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:52,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:52,206 INFO L87 Difference]: Start difference. First operand 811 states and 2787 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:52,609 INFO L93 Difference]: Finished difference Result 1191 states and 3865 transitions. [2021-03-10 22:09:52,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:52,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:52,612 INFO L225 Difference]: With dead ends: 1191 [2021-03-10 22:09:52,612 INFO L226 Difference]: Without dead ends: 1191 [2021-03-10 22:09:52,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-03-10 22:09:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 819. [2021-03-10 22:09:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.443765281173594) internal successors, (2817), 818 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2817 transitions. [2021-03-10 22:09:52,622 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2817 transitions. Word has length 20 [2021-03-10 22:09:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:52,622 INFO L480 AbstractCegarLoop]: Abstraction has 819 states and 2817 transitions. [2021-03-10 22:09:52,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2817 transitions. [2021-03-10 22:09:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:52,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:52,623 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:52,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5156 [2021-03-10 22:09:52,824 INFO L428 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:52,824 INFO L82 PathProgramCache]: Analyzing trace with hash 453265384, now seen corresponding path program 462 times [2021-03-10 22:09:52,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:52,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602872543] [2021-03-10 22:09:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:52,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602872543] [2021-03-10 22:09:52,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196285227] [2021-03-10 22:09:52,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:52,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:09:52,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:52,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:52,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:53,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:53,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:53,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841869234] [2021-03-10 22:09:53,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:53,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:53,117 INFO L87 Difference]: Start difference. First operand 819 states and 2817 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:53,670 INFO L93 Difference]: Finished difference Result 1257 states and 4032 transitions. [2021-03-10 22:09:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:53,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:53,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:53,672 INFO L225 Difference]: With dead ends: 1257 [2021-03-10 22:09:53,672 INFO L226 Difference]: Without dead ends: 1257 [2021-03-10 22:09:53,672 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:09:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-03-10 22:09:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 819. [2021-03-10 22:09:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4511002444987775) internal successors, (2823), 818 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2823 transitions. [2021-03-10 22:09:53,683 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2823 transitions. Word has length 20 [2021-03-10 22:09:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:53,683 INFO L480 AbstractCegarLoop]: Abstraction has 819 states and 2823 transitions. [2021-03-10 22:09:53,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,683 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2823 transitions. [2021-03-10 22:09:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:53,684 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:53,684 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:53,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5160,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:53,884 INFO L428 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1716732652, now seen corresponding path program 463 times [2021-03-10 22:09:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:53,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104860638] [2021-03-10 22:09:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:53,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104860638] [2021-03-10 22:09:53,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644018614] [2021-03-10 22:09:53,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:54,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:54,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:54,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:54,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:54,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803610823] [2021-03-10 22:09:54,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:54,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:54,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:54,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:54,261 INFO L87 Difference]: Start difference. First operand 819 states and 2823 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:55,015 INFO L93 Difference]: Finished difference Result 1223 states and 3936 transitions. [2021-03-10 22:09:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:55,018 INFO L225 Difference]: With dead ends: 1223 [2021-03-10 22:09:55,018 INFO L226 Difference]: Without dead ends: 1209 [2021-03-10 22:09:55,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 744.8ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-03-10 22:09:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 821. [2021-03-10 22:09:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.451219512195122) internal successors, (2830), 820 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2830 transitions. [2021-03-10 22:09:55,028 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2830 transitions. Word has length 20 [2021-03-10 22:09:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:55,028 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2830 transitions. [2021-03-10 22:09:55,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2830 transitions. [2021-03-10 22:09:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:55,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:55,029 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:55,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5167 [2021-03-10 22:09:55,230 INFO L428 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2093035288, now seen corresponding path program 464 times [2021-03-10 22:09:55,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:55,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876479006] [2021-03-10 22:09:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:55,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876479006] [2021-03-10 22:09:55,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660659588] [2021-03-10 22:09:55,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:55,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:55,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:55,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:55,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:55,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:55,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:55,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389935071] [2021-03-10 22:09:55,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:55,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:55,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:55,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:55,593 INFO L87 Difference]: Start difference. First operand 821 states and 2830 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:56,300 INFO L93 Difference]: Finished difference Result 1274 states and 4065 transitions. [2021-03-10 22:09:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:56,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:56,302 INFO L225 Difference]: With dead ends: 1274 [2021-03-10 22:09:56,302 INFO L226 Difference]: Without dead ends: 1274 [2021-03-10 22:09:56,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:56,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-03-10 22:09:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 819. [2021-03-10 22:09:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4511002444987775) internal successors, (2823), 818 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2823 transitions. [2021-03-10 22:09:56,313 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2823 transitions. Word has length 20 [2021-03-10 22:09:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:56,313 INFO L480 AbstractCegarLoop]: Abstraction has 819 states and 2823 transitions. [2021-03-10 22:09:56,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2823 transitions. [2021-03-10 22:09:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:56,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:56,314 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:56,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5176 [2021-03-10 22:09:56,514 INFO L428 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:56,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1563484264, now seen corresponding path program 465 times [2021-03-10 22:09:56,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:56,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313741041] [2021-03-10 22:09:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:56,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313741041] [2021-03-10 22:09:56,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252687622] [2021-03-10 22:09:56,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:56,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:56,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:56,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:56,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:56,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:56,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:56,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903787071] [2021-03-10 22:09:56,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:56,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:56,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:56,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:56,805 INFO L87 Difference]: Start difference. First operand 819 states and 2823 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:57,216 INFO L93 Difference]: Finished difference Result 1292 states and 4129 transitions. [2021-03-10 22:09:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:57,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:57,218 INFO L225 Difference]: With dead ends: 1292 [2021-03-10 22:09:57,218 INFO L226 Difference]: Without dead ends: 1292 [2021-03-10 22:09:57,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:57,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-03-10 22:09:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 822. [2021-03-10 22:09:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.4567600487210717) internal successors, (2838), 821 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:57,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2838 transitions. [2021-03-10 22:09:57,228 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2838 transitions. Word has length 20 [2021-03-10 22:09:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:57,228 INFO L480 AbstractCegarLoop]: Abstraction has 822 states and 2838 transitions. [2021-03-10 22:09:57,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2838 transitions. [2021-03-10 22:09:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:57,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:57,229 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:57,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5184 [2021-03-10 22:09:57,430 INFO L428 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:57,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1548716952, now seen corresponding path program 466 times [2021-03-10 22:09:57,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:57,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25037360] [2021-03-10 22:09:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:57,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25037360] [2021-03-10 22:09:57,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401888156] [2021-03-10 22:09:57,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:57,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:57,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:57,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:57,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:57,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608227100] [2021-03-10 22:09:57,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:57,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:57,723 INFO L87 Difference]: Start difference. First operand 822 states and 2838 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:58,308 INFO L93 Difference]: Finished difference Result 1323 states and 4214 transitions. [2021-03-10 22:09:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:58,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:58,311 INFO L225 Difference]: With dead ends: 1323 [2021-03-10 22:09:58,311 INFO L226 Difference]: Without dead ends: 1323 [2021-03-10 22:09:58,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:09:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-03-10 22:09:58,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 825. [2021-03-10 22:09:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.462378640776699) internal successors, (2853), 824 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2853 transitions. [2021-03-10 22:09:58,322 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2853 transitions. Word has length 20 [2021-03-10 22:09:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:58,322 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 2853 transitions. [2021-03-10 22:09:58,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2853 transitions. [2021-03-10 22:09:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:58,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:58,323 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:58,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5189 [2021-03-10 22:09:58,523 INFO L428 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash 789113388, now seen corresponding path program 467 times [2021-03-10 22:09:58,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:58,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218961757] [2021-03-10 22:09:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:58,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218961757] [2021-03-10 22:09:58,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983425585] [2021-03-10 22:09:58,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:58,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:58,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:58,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:58,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:58,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:58,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:58,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031336814] [2021-03-10 22:09:58,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:58,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:58,825 INFO L87 Difference]: Start difference. First operand 825 states and 2853 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:59,390 INFO L93 Difference]: Finished difference Result 1280 states and 4111 transitions. [2021-03-10 22:09:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:59,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:59,393 INFO L225 Difference]: With dead ends: 1280 [2021-03-10 22:09:59,393 INFO L226 Difference]: Without dead ends: 1280 [2021-03-10 22:09:59,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:59,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-03-10 22:09:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 819. [2021-03-10 22:09:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4511002444987775) internal successors, (2823), 818 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2823 transitions. [2021-03-10 22:09:59,403 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2823 transitions. Word has length 20 [2021-03-10 22:09:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:59,403 INFO L480 AbstractCegarLoop]: Abstraction has 819 states and 2823 transitions. [2021-03-10 22:09:59,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2823 transitions. [2021-03-10 22:09:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:59,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:59,404 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:59,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5195,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:59,605 INFO L428 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1884284474, now seen corresponding path program 468 times [2021-03-10 22:09:59,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:59,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302148762] [2021-03-10 22:09:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:59,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302148762] [2021-03-10 22:09:59,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762833275] [2021-03-10 22:09:59,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:59,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:09:59,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:59,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:09:59,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:59,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:59,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:59,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619103894] [2021-03-10 22:09:59,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:59,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:59,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:59,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:59,906 INFO L87 Difference]: Start difference. First operand 819 states and 2823 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:01,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:01,206 INFO L93 Difference]: Finished difference Result 1522 states and 4647 transitions. [2021-03-10 22:10:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:10:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:01,208 INFO L225 Difference]: With dead ends: 1522 [2021-03-10 22:10:01,208 INFO L226 Difference]: Without dead ends: 1522 [2021-03-10 22:10:01,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1108.8ms TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:10:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-03-10 22:10:01,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 820. [2021-03-10 22:10:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.4542124542124544) internal successors, (2829), 819 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2829 transitions. [2021-03-10 22:10:01,220 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2829 transitions. Word has length 20 [2021-03-10 22:10:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:01,220 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 2829 transitions. [2021-03-10 22:10:01,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2829 transitions. [2021-03-10 22:10:01,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:01,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:01,221 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:01,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5201 [2021-03-10 22:10:01,422 INFO L428 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:01,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:01,422 INFO L82 PathProgramCache]: Analyzing trace with hash -795264508, now seen corresponding path program 469 times [2021-03-10 22:10:01,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:01,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867416016] [2021-03-10 22:10:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867416016] [2021-03-10 22:10:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896430948] [2021-03-10 22:10:01,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:01,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:01,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:01,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:01,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465579231] [2021-03-10 22:10:01,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:01,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:01,800 INFO L87 Difference]: Start difference. First operand 820 states and 2829 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:02,194 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 22:10:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:02,681 INFO L93 Difference]: Finished difference Result 1316 states and 4157 transitions. [2021-03-10 22:10:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:02,683 INFO L225 Difference]: With dead ends: 1316 [2021-03-10 22:10:02,683 INFO L226 Difference]: Without dead ends: 1309 [2021-03-10 22:10:02,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 805.5ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-03-10 22:10:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 831. [2021-03-10 22:10:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.4433734939759035) internal successors, (2858), 830 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2858 transitions. [2021-03-10 22:10:02,693 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2858 transitions. Word has length 20 [2021-03-10 22:10:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:02,694 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2858 transitions. [2021-03-10 22:10:02,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2858 transitions. [2021-03-10 22:10:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:02,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:02,695 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:02,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5208,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:02,895 INFO L428 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1572638316, now seen corresponding path program 470 times [2021-03-10 22:10:02,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:02,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833589135] [2021-03-10 22:10:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:02,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833589135] [2021-03-10 22:10:02,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756660288] [2021-03-10 22:10:02,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:03,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:03,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:03,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:03,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:03,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:03,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401441053] [2021-03-10 22:10:03,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:03,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:03,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:03,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:03,271 INFO L87 Difference]: Start difference. First operand 831 states and 2858 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:03,624 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 22:10:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:04,001 INFO L93 Difference]: Finished difference Result 1362 states and 4273 transitions. [2021-03-10 22:10:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:04,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:04,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:04,004 INFO L225 Difference]: With dead ends: 1362 [2021-03-10 22:10:04,004 INFO L226 Difference]: Without dead ends: 1362 [2021-03-10 22:10:04,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 731.1ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-03-10 22:10:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 829. [2021-03-10 22:10:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4456521739130435) internal successors, (2853), 828 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2853 transitions. [2021-03-10 22:10:04,021 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2853 transitions. Word has length 20 [2021-03-10 22:10:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:04,021 INFO L480 AbstractCegarLoop]: Abstraction has 829 states and 2853 transitions. [2021-03-10 22:10:04,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2853 transitions. [2021-03-10 22:10:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:04,022 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:04,022 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:04,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5224,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:04,223 INFO L428 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:04,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1659282384, now seen corresponding path program 471 times [2021-03-10 22:10:04,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:04,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200271988] [2021-03-10 22:10:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:04,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200271988] [2021-03-10 22:10:04,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228554226] [2021-03-10 22:10:04,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:04,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:10:04,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:04,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:04,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:04,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:04,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880314151] [2021-03-10 22:10:04,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:04,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:04,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:04,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:04,522 INFO L87 Difference]: Start difference. First operand 829 states and 2853 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:05,510 INFO L93 Difference]: Finished difference Result 1478 states and 4585 transitions. [2021-03-10 22:10:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:10:05,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:05,512 INFO L225 Difference]: With dead ends: 1478 [2021-03-10 22:10:05,512 INFO L226 Difference]: Without dead ends: 1478 [2021-03-10 22:10:05,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 807.3ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:10:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-03-10 22:10:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 832. [2021-03-10 22:10:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.4512635379061374) internal successors, (2868), 831 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2868 transitions. [2021-03-10 22:10:05,524 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2868 transitions. Word has length 20 [2021-03-10 22:10:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:05,525 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 2868 transitions. [2021-03-10 22:10:05,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2868 transitions. [2021-03-10 22:10:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:05,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:05,526 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:05,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5235,500 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:05,726 INFO L428 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:05,726 INFO L82 PathProgramCache]: Analyzing trace with hash -366939984, now seen corresponding path program 472 times [2021-03-10 22:10:05,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:05,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715488089] [2021-03-10 22:10:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:05,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715488089] [2021-03-10 22:10:05,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621911755] [2021-03-10 22:10:05,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:05,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:05,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:06,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:06,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:06,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624205783] [2021-03-10 22:10:06,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:06,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:06,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:06,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:06,039 INFO L87 Difference]: Start difference. First operand 832 states and 2868 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:06,900 INFO L93 Difference]: Finished difference Result 1447 states and 4518 transitions. [2021-03-10 22:10:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:10:06,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:06,903 INFO L225 Difference]: With dead ends: 1447 [2021-03-10 22:10:06,903 INFO L226 Difference]: Without dead ends: 1447 [2021-03-10 22:10:06,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 732.0ms TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:10:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-03-10 22:10:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 829. [2021-03-10 22:10:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4456521739130435) internal successors, (2853), 828 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2853 transitions. [2021-03-10 22:10:06,915 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2853 transitions. Word has length 20 [2021-03-10 22:10:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:06,915 INFO L480 AbstractCegarLoop]: Abstraction has 829 states and 2853 transitions. [2021-03-10 22:10:06,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2853 transitions. [2021-03-10 22:10:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:06,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:06,916 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:07,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5243 [2021-03-10 22:10:07,117 INFO L428 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1638545856, now seen corresponding path program 473 times [2021-03-10 22:10:07,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:07,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364614649] [2021-03-10 22:10:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364614649] [2021-03-10 22:10:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7543195] [2021-03-10 22:10:07,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:07,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:10:07,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:07,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:07,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:07,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:07,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352012179] [2021-03-10 22:10:07,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:07,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:07,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:07,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:07,424 INFO L87 Difference]: Start difference. First operand 829 states and 2853 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:07,786 INFO L93 Difference]: Finished difference Result 1221 states and 3938 transitions. [2021-03-10 22:10:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:07,788 INFO L225 Difference]: With dead ends: 1221 [2021-03-10 22:10:07,788 INFO L226 Difference]: Without dead ends: 1215 [2021-03-10 22:10:07,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 318.9ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-03-10 22:10:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 839. [2021-03-10 22:10:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.4367541766109784) internal successors, (2880), 838 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2880 transitions. [2021-03-10 22:10:07,798 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2880 transitions. Word has length 20 [2021-03-10 22:10:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:07,798 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 2880 transitions. [2021-03-10 22:10:07,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:07,798 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2880 transitions. [2021-03-10 22:10:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:07,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:07,799 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:07,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5251 [2021-03-10 22:10:07,999 INFO L428 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:07,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:07,999 INFO L82 PathProgramCache]: Analyzing trace with hash 740997514, now seen corresponding path program 474 times [2021-03-10 22:10:08,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:08,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126632] [2021-03-10 22:10:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:08,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126632] [2021-03-10 22:10:08,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573302198] [2021-03-10 22:10:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:08,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:10:08,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:08,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:08,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:08,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:08,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:08,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153076239] [2021-03-10 22:10:08,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:08,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:08,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:08,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:08,280 INFO L87 Difference]: Start difference. First operand 839 states and 2880 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:09,069 INFO L93 Difference]: Finished difference Result 1447 states and 4479 transitions. [2021-03-10 22:10:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:10:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:09,072 INFO L225 Difference]: With dead ends: 1447 [2021-03-10 22:10:09,072 INFO L226 Difference]: Without dead ends: 1447 [2021-03-10 22:10:09,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:10:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-03-10 22:10:09,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 837. [2021-03-10 22:10:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.438995215311005) internal successors, (2875), 836 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2875 transitions. [2021-03-10 22:10:09,083 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2875 transitions. Word has length 20 [2021-03-10 22:10:09,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:09,084 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 2875 transitions. [2021-03-10 22:10:09,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2875 transitions. [2021-03-10 22:10:09,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:09,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:09,085 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:09,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5259,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:09,285 INFO L428 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash 481386260, now seen corresponding path program 475 times [2021-03-10 22:10:09,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:09,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304367911] [2021-03-10 22:10:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:09,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304367911] [2021-03-10 22:10:09,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401726898] [2021-03-10 22:10:09,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:09,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:09,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:09,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:09,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:09,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580595110] [2021-03-10 22:10:09,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:09,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:09,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:09,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:09,669 INFO L87 Difference]: Start difference. First operand 837 states and 2875 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:10,413 INFO L93 Difference]: Finished difference Result 1312 states and 4159 transitions. [2021-03-10 22:10:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:10,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:10,415 INFO L225 Difference]: With dead ends: 1312 [2021-03-10 22:10:10,415 INFO L226 Difference]: Without dead ends: 1312 [2021-03-10 22:10:10,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-03-10 22:10:10,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 823. [2021-03-10 22:10:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.435523114355231) internal successors, (2824), 822 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-03-10 22:10:10,427 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-03-10 22:10:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:10,427 INFO L480 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-03-10 22:10:10,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-03-10 22:10:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:10,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:10,428 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:10,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5266 [2021-03-10 22:10:10,628 INFO L428 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:10,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1517456554, now seen corresponding path program 476 times [2021-03-10 22:10:10,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:10,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975796775] [2021-03-10 22:10:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:10,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975796775] [2021-03-10 22:10:10,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130813349] [2021-03-10 22:10:10,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:10,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:10,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:10,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:10,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:10,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:10,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755429836] [2021-03-10 22:10:10,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:10,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:10,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:10,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:10,975 INFO L87 Difference]: Start difference. First operand 823 states and 2824 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:11,537 INFO L93 Difference]: Finished difference Result 1259 states and 4005 transitions. [2021-03-10 22:10:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:10:11,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:11,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:11,539 INFO L225 Difference]: With dead ends: 1259 [2021-03-10 22:10:11,539 INFO L226 Difference]: Without dead ends: 1245 [2021-03-10 22:10:11,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-03-10 22:10:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 825. [2021-03-10 22:10:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.4356796116504853) internal successors, (2831), 824 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2831 transitions. [2021-03-10 22:10:11,550 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2831 transitions. Word has length 20 [2021-03-10 22:10:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:11,550 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 2831 transitions. [2021-03-10 22:10:11,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2831 transitions. [2021-03-10 22:10:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:11,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:11,551 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:11,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5275 [2021-03-10 22:10:11,752 INFO L428 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1908000066, now seen corresponding path program 477 times [2021-03-10 22:10:11,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:11,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685887967] [2021-03-10 22:10:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:11,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685887967] [2021-03-10 22:10:11,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203178407] [2021-03-10 22:10:11,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:11,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:10:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:12,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:12,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:12,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953085859] [2021-03-10 22:10:12,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:12,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:12,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:12,099 INFO L87 Difference]: Start difference. First operand 825 states and 2831 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:12,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:12,859 INFO L93 Difference]: Finished difference Result 1300 states and 4095 transitions. [2021-03-10 22:10:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:12,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:12,862 INFO L225 Difference]: With dead ends: 1300 [2021-03-10 22:10:12,862 INFO L226 Difference]: Without dead ends: 1293 [2021-03-10 22:10:12,862 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 666.8ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:10:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-03-10 22:10:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 836. [2021-03-10 22:10:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.4251497005988023) internal successors, (2860), 835 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2860 transitions. [2021-03-10 22:10:12,872 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2860 transitions. Word has length 20 [2021-03-10 22:10:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:12,872 INFO L480 AbstractCegarLoop]: Abstraction has 836 states and 2860 transitions. [2021-03-10 22:10:12,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:12,872 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2860 transitions. [2021-03-10 22:10:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:12,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:12,873 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:13,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5282 [2021-03-10 22:10:13,074 INFO L428 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:13,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:13,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1141153918, now seen corresponding path program 478 times [2021-03-10 22:10:13,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:13,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191854514] [2021-03-10 22:10:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:13,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191854514] [2021-03-10 22:10:13,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207290562] [2021-03-10 22:10:13,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:13,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:13,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:13,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:13,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:13,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:13,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331651173] [2021-03-10 22:10:13,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:13,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:13,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:13,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:13,430 INFO L87 Difference]: Start difference. First operand 836 states and 2860 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:13,942 INFO L93 Difference]: Finished difference Result 1337 states and 4181 transitions. [2021-03-10 22:10:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:10:13,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:13,945 INFO L225 Difference]: With dead ends: 1337 [2021-03-10 22:10:13,945 INFO L226 Difference]: Without dead ends: 1337 [2021-03-10 22:10:13,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 446.0ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-03-10 22:10:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 823. [2021-03-10 22:10:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.435523114355231) internal successors, (2824), 822 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-03-10 22:10:13,956 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-03-10 22:10:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:13,957 INFO L480 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-03-10 22:10:13,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:13,957 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-03-10 22:10:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:13,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:13,957 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:14,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5287 [2021-03-10 22:10:14,158 INFO L428 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:14,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:14,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1031071580, now seen corresponding path program 479 times [2021-03-10 22:10:14,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:14,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977184703] [2021-03-10 22:10:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977184703] [2021-03-10 22:10:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862975359] [2021-03-10 22:10:14,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:14,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:14,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:14,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:14,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:14,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:14,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:14,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:14,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-03-10 22:10:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:14,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:14,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:14,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241849616] [2021-03-10 22:10:14,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:14,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:14,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:14,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:14,473 INFO L87 Difference]: Start difference. First operand 823 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:15,010 INFO L93 Difference]: Finished difference Result 1365 states and 4251 transitions. [2021-03-10 22:10:15,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:15,011 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:15,013 INFO L225 Difference]: With dead ends: 1365 [2021-03-10 22:10:15,013 INFO L226 Difference]: Without dead ends: 1358 [2021-03-10 22:10:15,013 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 459.3ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-03-10 22:10:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 838. [2021-03-10 22:10:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.4229390681003586) internal successors, (2865), 837 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2865 transitions. [2021-03-10 22:10:15,024 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2865 transitions. Word has length 20 [2021-03-10 22:10:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:15,025 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 2865 transitions. [2021-03-10 22:10:15,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2865 transitions. [2021-03-10 22:10:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:15,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:15,025 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:15,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5292,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:15,226 INFO L428 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:15,226 INFO L82 PathProgramCache]: Analyzing trace with hash 264225432, now seen corresponding path program 480 times [2021-03-10 22:10:15,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:15,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040819223] [2021-03-10 22:10:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:15,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040819223] [2021-03-10 22:10:15,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942874316] [2021-03-10 22:10:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:15,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:10:15,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:15,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:15,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:15,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:15,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:15,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:15,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:15,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-03-10 22:10:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:15,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:15,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:15,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707522407] [2021-03-10 22:10:15,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:15,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:15,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:15,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:15,546 INFO L87 Difference]: Start difference. First operand 838 states and 2865 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:16,220 INFO L93 Difference]: Finished difference Result 1475 states and 4502 transitions. [2021-03-10 22:10:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:16,223 INFO L225 Difference]: With dead ends: 1475 [2021-03-10 22:10:16,223 INFO L226 Difference]: Without dead ends: 1475 [2021-03-10 22:10:16,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 557.7ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-03-10 22:10:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 836. [2021-03-10 22:10:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.4251497005988023) internal successors, (2860), 835 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2860 transitions. [2021-03-10 22:10:16,235 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2860 transitions. Word has length 20 [2021-03-10 22:10:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:16,235 INFO L480 AbstractCegarLoop]: Abstraction has 836 states and 2860 transitions. [2021-03-10 22:10:16,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2860 transitions. [2021-03-10 22:10:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:16,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:16,236 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:16,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5300 [2021-03-10 22:10:16,436 INFO L428 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1439716076, now seen corresponding path program 481 times [2021-03-10 22:10:16,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:16,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761163754] [2021-03-10 22:10:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:16,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761163754] [2021-03-10 22:10:16,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622744893] [2021-03-10 22:10:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:16,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:16,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:16,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:16,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:16,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:16,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:16,712 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-03-10 22:10:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:16,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:16,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:10:16,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224231142] [2021-03-10 22:10:16,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:16,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:16,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:16,728 INFO L87 Difference]: Start difference. First operand 836 states and 2860 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:17,108 INFO L93 Difference]: Finished difference Result 1322 states and 4166 transitions. [2021-03-10 22:10:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:17,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:17,110 INFO L225 Difference]: With dead ends: 1322 [2021-03-10 22:10:17,110 INFO L226 Difference]: Without dead ends: 1322 [2021-03-10 22:10:17,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:17,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-03-10 22:10:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 821. [2021-03-10 22:10:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4353658536585368) internal successors, (2817), 820 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2817 transitions. [2021-03-10 22:10:17,121 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2817 transitions. Word has length 20 [2021-03-10 22:10:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:17,121 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2817 transitions. [2021-03-10 22:10:17,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2817 transitions. [2021-03-10 22:10:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:17,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:17,122 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:17,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5308 [2021-03-10 22:10:17,322 INFO L428 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:17,323 INFO L82 PathProgramCache]: Analyzing trace with hash 290550556, now seen corresponding path program 482 times [2021-03-10 22:10:17,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:17,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587066535] [2021-03-10 22:10:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:17,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587066535] [2021-03-10 22:10:17,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074848234] [2021-03-10 22:10:17,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:17,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:17,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:17,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:17,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:17,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:17,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364613815] [2021-03-10 22:10:17,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:17,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:17,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:17,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:17,586 INFO L87 Difference]: Start difference. First operand 821 states and 2817 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:17,919 INFO L93 Difference]: Finished difference Result 1253 states and 4037 transitions. [2021-03-10 22:10:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:17,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:17,922 INFO L225 Difference]: With dead ends: 1253 [2021-03-10 22:10:17,922 INFO L226 Difference]: Without dead ends: 1253 [2021-03-10 22:10:17,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-03-10 22:10:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 822. [2021-03-10 22:10:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.4372716199756397) internal successors, (2822), 821 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2822 transitions. [2021-03-10 22:10:17,933 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2822 transitions. Word has length 20 [2021-03-10 22:10:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:17,933 INFO L480 AbstractCegarLoop]: Abstraction has 822 states and 2822 transitions. [2021-03-10 22:10:17,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2822 transitions. [2021-03-10 22:10:17,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:17,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:17,934 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:18,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5316,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:18,134 INFO L428 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:18,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1473316636, now seen corresponding path program 483 times [2021-03-10 22:10:18,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:18,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286670010] [2021-03-10 22:10:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:18,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286670010] [2021-03-10 22:10:18,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916835795] [2021-03-10 22:10:18,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:18,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:10:18,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:18,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:18,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:18,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:18,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890762883] [2021-03-10 22:10:18,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:18,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:18,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:18,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:18,438 INFO L87 Difference]: Start difference. First operand 822 states and 2822 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:18,800 INFO L93 Difference]: Finished difference Result 1282 states and 4100 transitions. [2021-03-10 22:10:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:18,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:18,802 INFO L225 Difference]: With dead ends: 1282 [2021-03-10 22:10:18,802 INFO L226 Difference]: Without dead ends: 1282 [2021-03-10 22:10:18,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 306.1ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-03-10 22:10:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 821. [2021-03-10 22:10:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4353658536585368) internal successors, (2817), 820 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2817 transitions. [2021-03-10 22:10:18,813 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2817 transitions. Word has length 20 [2021-03-10 22:10:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:18,813 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2817 transitions. [2021-03-10 22:10:18,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2817 transitions. [2021-03-10 22:10:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:18,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:18,814 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:19,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5319 [2021-03-10 22:10:19,014 INFO L428 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash -483820320, now seen corresponding path program 484 times [2021-03-10 22:10:19,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:19,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620692773] [2021-03-10 22:10:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:19,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620692773] [2021-03-10 22:10:19,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582070098] [2021-03-10 22:10:19,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:19,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:19,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:19,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:19,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:19,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604466809] [2021-03-10 22:10:19,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:19,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:19,304 INFO L87 Difference]: Start difference. First operand 821 states and 2817 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:19,630 INFO L93 Difference]: Finished difference Result 1239 states and 4003 transitions. [2021-03-10 22:10:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:19,632 INFO L225 Difference]: With dead ends: 1239 [2021-03-10 22:10:19,632 INFO L226 Difference]: Without dead ends: 1239 [2021-03-10 22:10:19,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-03-10 22:10:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 807. [2021-03-10 22:10:19,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.430521091811414) internal successors, (2765), 806 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2765 transitions. [2021-03-10 22:10:19,642 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2765 transitions. Word has length 20 [2021-03-10 22:10:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:19,643 INFO L480 AbstractCegarLoop]: Abstraction has 807 states and 2765 transitions. [2021-03-10 22:10:19,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2765 transitions. [2021-03-10 22:10:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:19,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:19,644 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:19,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5324,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:19,844 INFO L428 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:19,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1133715308, now seen corresponding path program 485 times [2021-03-10 22:10:19,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:19,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637323384] [2021-03-10 22:10:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:19,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637323384] [2021-03-10 22:10:19,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750459839] [2021-03-10 22:10:19,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:20,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:20,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:20,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:20,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:20,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:20,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:20,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,089 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:10:20,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:20,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:10:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:20,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:20,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:20,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68319892] [2021-03-10 22:10:20,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:20,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:20,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:20,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:20,163 INFO L87 Difference]: Start difference. First operand 807 states and 2765 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:20,640 INFO L93 Difference]: Finished difference Result 1347 states and 4290 transitions. [2021-03-10 22:10:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:20,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:20,642 INFO L225 Difference]: With dead ends: 1347 [2021-03-10 22:10:20,642 INFO L226 Difference]: Without dead ends: 1347 [2021-03-10 22:10:20,643 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:20,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-03-10 22:10:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 813. [2021-03-10 22:10:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.438423645320197) internal successors, (2792), 812 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2792 transitions. [2021-03-10 22:10:20,653 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2792 transitions. Word has length 20 [2021-03-10 22:10:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:20,654 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 2792 transitions. [2021-03-10 22:10:20,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2792 transitions. [2021-03-10 22:10:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:20,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:20,655 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:20,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5329,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:20,855 INFO L428 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:20,855 INFO L82 PathProgramCache]: Analyzing trace with hash -823421648, now seen corresponding path program 486 times [2021-03-10 22:10:20,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:20,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447245776] [2021-03-10 22:10:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:20,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447245776] [2021-03-10 22:10:20,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455955992] [2021-03-10 22:10:20,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:21,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:10:21,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:21,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:21,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:21,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:21,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:21,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:21,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:21,120 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:10:21,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:21,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:10:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:21,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:21,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:21,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412697682] [2021-03-10 22:10:21,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:21,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:21,196 INFO L87 Difference]: Start difference. First operand 813 states and 2792 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:21,711 INFO L93 Difference]: Finished difference Result 1349 states and 4294 transitions. [2021-03-10 22:10:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:21,712 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:21,714 INFO L225 Difference]: With dead ends: 1349 [2021-03-10 22:10:21,714 INFO L226 Difference]: Without dead ends: 1349 [2021-03-10 22:10:21,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-03-10 22:10:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 810. [2021-03-10 22:10:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4326328800988875) internal successors, (2777), 809 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2777 transitions. [2021-03-10 22:10:21,725 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2777 transitions. Word has length 20 [2021-03-10 22:10:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:21,725 INFO L480 AbstractCegarLoop]: Abstraction has 810 states and 2777 transitions. [2021-03-10 22:10:21,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2777 transitions. [2021-03-10 22:10:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:21,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:21,726 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:21,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5335,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:21,927 INFO L428 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:21,927 INFO L82 PathProgramCache]: Analyzing trace with hash 790145086, now seen corresponding path program 487 times [2021-03-10 22:10:21,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:21,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490543758] [2021-03-10 22:10:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:22,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490543758] [2021-03-10 22:10:22,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603452500] [2021-03-10 22:10:22,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:22,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:22,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:22,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:22,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:22,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:22,185 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:10:22,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:22,186 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:10:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:22,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:22,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:22,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032684591] [2021-03-10 22:10:22,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:22,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:22,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:22,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:22,234 INFO L87 Difference]: Start difference. First operand 810 states and 2777 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:22,650 INFO L93 Difference]: Finished difference Result 1298 states and 4157 transitions. [2021-03-10 22:10:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:22,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:22,653 INFO L225 Difference]: With dead ends: 1298 [2021-03-10 22:10:22,653 INFO L226 Difference]: Without dead ends: 1298 [2021-03-10 22:10:22,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:22,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-03-10 22:10:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 804. [2021-03-10 22:10:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.428393524283935) internal successors, (2753), 803 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2753 transitions. [2021-03-10 22:10:22,663 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2753 transitions. Word has length 20 [2021-03-10 22:10:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:22,663 INFO L480 AbstractCegarLoop]: Abstraction has 804 states and 2753 transitions. [2021-03-10 22:10:22,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2753 transitions. [2021-03-10 22:10:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:22,664 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:22,664 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:22,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5342,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:22,864 INFO L428 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:22,865 INFO L82 PathProgramCache]: Analyzing trace with hash -237271706, now seen corresponding path program 488 times [2021-03-10 22:10:22,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:22,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326656064] [2021-03-10 22:10:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:22,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326656064] [2021-03-10 22:10:22,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917878423] [2021-03-10 22:10:22,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:23,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:23,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:23,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:23,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,108 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:10:23,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:23,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:23,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:23,121 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:10:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:23,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:23,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:23,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680541187] [2021-03-10 22:10:23,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:23,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:23,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:23,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:23,215 INFO L87 Difference]: Start difference. First operand 804 states and 2753 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:24,000 INFO L93 Difference]: Finished difference Result 1594 states and 4848 transitions. [2021-03-10 22:10:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:10:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:24,003 INFO L225 Difference]: With dead ends: 1594 [2021-03-10 22:10:24,003 INFO L226 Difference]: Without dead ends: 1594 [2021-03-10 22:10:24,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:10:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-03-10 22:10:24,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 812. [2021-03-10 22:10:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.435265104808878) internal successors, (2786), 811 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2786 transitions. [2021-03-10 22:10:24,015 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2786 transitions. Word has length 20 [2021-03-10 22:10:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:24,015 INFO L480 AbstractCegarLoop]: Abstraction has 812 states and 2786 transitions. [2021-03-10 22:10:24,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2786 transitions. [2021-03-10 22:10:24,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:24,016 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:24,016 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:24,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5348,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:24,217 INFO L428 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1122845034, now seen corresponding path program 489 times [2021-03-10 22:10:24,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:24,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001399070] [2021-03-10 22:10:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:24,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001399070] [2021-03-10 22:10:24,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806221543] [2021-03-10 22:10:24,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:24,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:10:24,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:24,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:24,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:24,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:24,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:24,572 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.6 percent of original size [2021-03-10 22:10:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:24,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:24,621 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-03-10 22:10:24,621 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-03-10 22:10:24,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:24,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:24,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:24,629 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:24,655 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:10:24,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:24,656 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:79, output treesize:20 [2021-03-10 22:10:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:24,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:24,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:24,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213546889] [2021-03-10 22:10:24,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:24,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:24,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:24,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:24,756 INFO L87 Difference]: Start difference. First operand 812 states and 2786 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:25,524 INFO L93 Difference]: Finished difference Result 1400 states and 4421 transitions. [2021-03-10 22:10:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:25,527 INFO L225 Difference]: With dead ends: 1400 [2021-03-10 22:10:25,527 INFO L226 Difference]: Without dead ends: 1400 [2021-03-10 22:10:25,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-03-10 22:10:25,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 814. [2021-03-10 22:10:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4477244772447726) internal successors, (2803), 813 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2803 transitions. [2021-03-10 22:10:25,538 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2803 transitions. Word has length 20 [2021-03-10 22:10:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:25,538 INFO L480 AbstractCegarLoop]: Abstraction has 814 states and 2803 transitions. [2021-03-10 22:10:25,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2803 transitions. [2021-03-10 22:10:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:25,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:25,539 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:25,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5358,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:25,739 INFO L428 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:25,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1378146608, now seen corresponding path program 490 times [2021-03-10 22:10:25,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:25,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581036827] [2021-03-10 22:10:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:25,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581036827] [2021-03-10 22:10:25,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39548652] [2021-03-10 22:10:25,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:25,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:25,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:25,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:26,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:26,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:26,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,080 INFO L628 ElimStorePlain]: treesize reduction 25, result has 58.3 percent of original size [2021-03-10 22:10:26,080 INFO L518 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2021-03-10 22:10:26,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:26,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,113 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:10:26,113 INFO L518 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2021-03-10 22:10:26,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:26,114 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:20 [2021-03-10 22:10:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:26,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:26,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:26,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921469101] [2021-03-10 22:10:26,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:26,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:26,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:26,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:26,212 INFO L87 Difference]: Start difference. First operand 814 states and 2803 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:26,852 INFO L93 Difference]: Finished difference Result 1451 states and 4530 transitions. [2021-03-10 22:10:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:10:26,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:26,854 INFO L225 Difference]: With dead ends: 1451 [2021-03-10 22:10:26,854 INFO L226 Difference]: Without dead ends: 1444 [2021-03-10 22:10:26,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:26,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-03-10 22:10:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 825. [2021-03-10 22:10:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.436893203883495) internal successors, (2832), 824 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2832 transitions. [2021-03-10 22:10:26,866 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2832 transitions. Word has length 20 [2021-03-10 22:10:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:26,866 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 2832 transitions. [2021-03-10 22:10:26,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2832 transitions. [2021-03-10 22:10:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:26,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:26,867 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:27,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5367 [2021-03-10 22:10:27,067 INFO L428 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -548917864, now seen corresponding path program 491 times [2021-03-10 22:10:27,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:27,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667428857] [2021-03-10 22:10:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:27,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667428857] [2021-03-10 22:10:27,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026763368] [2021-03-10 22:10:27,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:27,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:27,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:27,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:27,398 INFO L628 ElimStorePlain]: treesize reduction 33, result has 54.8 percent of original size [2021-03-10 22:10:27,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_9 vanished before elimination [2021-03-10 22:10:27,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:27,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:27,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:27,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:27,432 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:10:27,432 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:10:27,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:27,433 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:20 [2021-03-10 22:10:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:27,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:27,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:27,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021929685] [2021-03-10 22:10:27,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:27,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:27,523 INFO L87 Difference]: Start difference. First operand 825 states and 2832 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:28,378 INFO L93 Difference]: Finished difference Result 1519 states and 4691 transitions. [2021-03-10 22:10:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:28,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:28,381 INFO L225 Difference]: With dead ends: 1519 [2021-03-10 22:10:28,381 INFO L226 Difference]: Without dead ends: 1519 [2021-03-10 22:10:28,381 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 787.1ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-03-10 22:10:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 823. [2021-03-10 22:10:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.4391727493917275) internal successors, (2827), 822 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2827 transitions. [2021-03-10 22:10:28,392 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2827 transitions. Word has length 20 [2021-03-10 22:10:28,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:28,392 INFO L480 AbstractCegarLoop]: Abstraction has 823 states and 2827 transitions. [2021-03-10 22:10:28,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2827 transitions. [2021-03-10 22:10:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:28,393 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:28,393 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:28,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5377 [2021-03-10 22:10:28,593 INFO L428 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash 514128732, now seen corresponding path program 492 times [2021-03-10 22:10:28,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:28,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781530914] [2021-03-10 22:10:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:28,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781530914] [2021-03-10 22:10:28,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896675327] [2021-03-10 22:10:28,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:28,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:10:28,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:28,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:28,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:28,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:28,880 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-03-10 22:10:28,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:28,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:28,911 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-03-10 22:10:28,911 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:10:28,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:28,912 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:10:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:29,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:29,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:29,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791230458] [2021-03-10 22:10:29,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:29,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:29,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:29,006 INFO L87 Difference]: Start difference. First operand 823 states and 2827 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:29,764 INFO L93 Difference]: Finished difference Result 1613 states and 4944 transitions. [2021-03-10 22:10:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:10:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:29,767 INFO L225 Difference]: With dead ends: 1613 [2021-03-10 22:10:29,767 INFO L226 Difference]: Without dead ends: 1613 [2021-03-10 22:10:29,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-03-10 22:10:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 826. [2021-03-10 22:10:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.444848484848485) internal successors, (2842), 825 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2842 transitions. [2021-03-10 22:10:29,780 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2842 transitions. Word has length 20 [2021-03-10 22:10:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:29,780 INFO L480 AbstractCegarLoop]: Abstraction has 826 states and 2842 transitions. [2021-03-10 22:10:29,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2842 transitions. [2021-03-10 22:10:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:29,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:29,781 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:29,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5387 [2021-03-10 22:10:29,981 INFO L428 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:29,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1806471132, now seen corresponding path program 493 times [2021-03-10 22:10:29,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:29,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383069414] [2021-03-10 22:10:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:30,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383069414] [2021-03-10 22:10:30,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974587356] [2021-03-10 22:10:30,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:30,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:30,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:30,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:30,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:30,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:30,273 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-03-10 22:10:30,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:30,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:30,306 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-03-10 22:10:30,306 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:10:30,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:30,307 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:10:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:30,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:30,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:30,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557733291] [2021-03-10 22:10:30,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:30,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:30,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:30,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:30,427 INFO L87 Difference]: Start difference. First operand 826 states and 2842 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:31,199 INFO L93 Difference]: Finished difference Result 1582 states and 4877 transitions. [2021-03-10 22:10:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:10:31,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:31,202 INFO L225 Difference]: With dead ends: 1582 [2021-03-10 22:10:31,202 INFO L226 Difference]: Without dead ends: 1582 [2021-03-10 22:10:31,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 669.5ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-03-10 22:10:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 823. [2021-03-10 22:10:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.4391727493917275) internal successors, (2827), 822 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2827 transitions. [2021-03-10 22:10:31,214 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2827 transitions. Word has length 20 [2021-03-10 22:10:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:31,214 INFO L480 AbstractCegarLoop]: Abstraction has 823 states and 2827 transitions. [2021-03-10 22:10:31,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2827 transitions. [2021-03-10 22:10:31,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:31,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:31,215 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:31,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5398 [2021-03-10 22:10:31,416 INFO L428 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash 534865260, now seen corresponding path program 494 times [2021-03-10 22:10:31,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:31,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15834165] [2021-03-10 22:10:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:31,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15834165] [2021-03-10 22:10:31,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434905077] [2021-03-10 22:10:31,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:31,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:31,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:31,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:31,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:31,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,720 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-03-10 22:10:31,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:31,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:31,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,755 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-03-10 22:10:31,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:31,757 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-03-10 22:10:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:31,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:31,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:31,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99931166] [2021-03-10 22:10:31,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:31,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:31,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:31,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:31,849 INFO L87 Difference]: Start difference. First operand 823 states and 2827 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:32,377 INFO L93 Difference]: Finished difference Result 1407 states and 4418 transitions. [2021-03-10 22:10:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:32,379 INFO L225 Difference]: With dead ends: 1407 [2021-03-10 22:10:32,379 INFO L226 Difference]: Without dead ends: 1401 [2021-03-10 22:10:32,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-03-10 22:10:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 833. [2021-03-10 22:10:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4302884615384617) internal successors, (2854), 832 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2854 transitions. [2021-03-10 22:10:32,390 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2854 transitions. Word has length 20 [2021-03-10 22:10:32,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:32,390 INFO L480 AbstractCegarLoop]: Abstraction has 833 states and 2854 transitions. [2021-03-10 22:10:32,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:32,390 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2854 transitions. [2021-03-10 22:10:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:32,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:32,391 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:32,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5409 [2021-03-10 22:10:32,591 INFO L428 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:32,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1380558666, now seen corresponding path program 495 times [2021-03-10 22:10:32,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:32,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681527113] [2021-03-10 22:10:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:32,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681527113] [2021-03-10 22:10:32,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466719329] [2021-03-10 22:10:32,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:32,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:10:32,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:32,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:32,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:32,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:32,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,875 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-03-10 22:10:32,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:32,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:32,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,908 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:10:32,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2021-03-10 22:10:32,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:32,909 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:10:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:33,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:33,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:33,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168635716] [2021-03-10 22:10:33,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:33,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:33,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:33,017 INFO L87 Difference]: Start difference. First operand 833 states and 2854 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:34,249 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:10:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:34,320 INFO L93 Difference]: Finished difference Result 1820 states and 5390 transitions. [2021-03-10 22:10:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:10:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:34,323 INFO L225 Difference]: With dead ends: 1820 [2021-03-10 22:10:34,323 INFO L226 Difference]: Without dead ends: 1820 [2021-03-10 22:10:34,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1176.3ms TimeCoverageRelationStatistics Valid=274, Invalid=848, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:10:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-03-10 22:10:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 831. [2021-03-10 22:10:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.432530120481928) internal successors, (2849), 830 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2849 transitions. [2021-03-10 22:10:34,336 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2849 transitions. Word has length 20 [2021-03-10 22:10:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:34,337 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2849 transitions. [2021-03-10 22:10:34,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2849 transitions. [2021-03-10 22:10:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:34,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:34,338 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:34,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5422,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:34,538 INFO L428 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1030459608, now seen corresponding path program 496 times [2021-03-10 22:10:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:34,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391570231] [2021-03-10 22:10:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:34,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391570231] [2021-03-10 22:10:34,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697393591] [2021-03-10 22:10:34,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:34,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:34,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:34,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:34,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:34,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:34,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:34,892 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.6 percent of original size [2021-03-10 22:10:34,892 INFO L518 ElimStorePlain]: Eliminatee v_prenex_18 vanished before elimination [2021-03-10 22:10:34,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:34,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:34,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:34,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:34,931 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:10:34,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:34,933 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-03-10 22:10:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:35,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:35,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:35,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263674077] [2021-03-10 22:10:35,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:35,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:35,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:35,046 INFO L87 Difference]: Start difference. First operand 831 states and 2849 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:35,779 INFO L93 Difference]: Finished difference Result 1485 states and 4643 transitions. [2021-03-10 22:10:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:35,782 INFO L225 Difference]: With dead ends: 1485 [2021-03-10 22:10:35,782 INFO L226 Difference]: Without dead ends: 1485 [2021-03-10 22:10:35,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 678.6ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-03-10 22:10:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 834. [2021-03-10 22:10:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.4381752701080432) internal successors, (2864), 833 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2864 transitions. [2021-03-10 22:10:35,794 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2864 transitions. Word has length 20 [2021-03-10 22:10:35,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:35,794 INFO L480 AbstractCegarLoop]: Abstraction has 834 states and 2864 transitions. [2021-03-10 22:10:35,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2864 transitions. [2021-03-10 22:10:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:35,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:35,796 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:35,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5433,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:35,996 INFO L428 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:35,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1640169920, now seen corresponding path program 497 times [2021-03-10 22:10:35,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:35,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108423251] [2021-03-10 22:10:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:36,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108423251] [2021-03-10 22:10:36,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483744646] [2021-03-10 22:10:36,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:36,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:10:36,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:36,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:36,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:36,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:36,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:36,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,346 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.6 percent of original size [2021-03-10 22:10:36,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-03-10 22:10:36,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:36,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:36,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,379 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:10:36,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:36,380 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-03-10 22:10:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:36,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:36,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:36,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014962441] [2021-03-10 22:10:36,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:36,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:36,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:36,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:36,486 INFO L87 Difference]: Start difference. First operand 834 states and 2864 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:37,216 INFO L93 Difference]: Finished difference Result 1479 states and 4625 transitions. [2021-03-10 22:10:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:10:37,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:37,219 INFO L225 Difference]: With dead ends: 1479 [2021-03-10 22:10:37,219 INFO L226 Difference]: Without dead ends: 1479 [2021-03-10 22:10:37,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 728.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-03-10 22:10:37,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 830. [2021-03-10 22:10:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4294330518697227) internal successors, (2843), 829 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2843 transitions. [2021-03-10 22:10:37,230 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2843 transitions. Word has length 20 [2021-03-10 22:10:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:37,230 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 2843 transitions. [2021-03-10 22:10:37,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2843 transitions. [2021-03-10 22:10:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:37,231 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:37,231 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:37,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5446 [2021-03-10 22:10:37,431 INFO L428 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:37,431 INFO L82 PathProgramCache]: Analyzing trace with hash -734282022, now seen corresponding path program 498 times [2021-03-10 22:10:37,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:37,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886411849] [2021-03-10 22:10:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:37,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886411849] [2021-03-10 22:10:37,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698974270] [2021-03-10 22:10:37,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:37,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:10:37,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:37,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:37,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:37,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,787 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.4 percent of original size [2021-03-10 22:10:37,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:37,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,837 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-03-10 22:10:37,837 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-03-10 22:10:37,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:37,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:37,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,870 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:10:37,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:37,871 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:114, output treesize:20 [2021-03-10 22:10:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:37,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:37,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:37,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625523368] [2021-03-10 22:10:37,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:37,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:37,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:37,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:37,938 INFO L87 Difference]: Start difference. First operand 830 states and 2843 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:38,546 INFO L93 Difference]: Finished difference Result 1445 states and 4523 transitions. [2021-03-10 22:10:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:10:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:38,549 INFO L225 Difference]: With dead ends: 1445 [2021-03-10 22:10:38,549 INFO L226 Difference]: Without dead ends: 1438 [2021-03-10 22:10:38,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-03-10 22:10:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 838. [2021-03-10 22:10:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.4277180406212664) internal successors, (2869), 837 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2869 transitions. [2021-03-10 22:10:38,561 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2869 transitions. Word has length 20 [2021-03-10 22:10:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:38,561 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 2869 transitions. [2021-03-10 22:10:38,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2869 transitions. [2021-03-10 22:10:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:38,562 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:38,562 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:38,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5460 [2021-03-10 22:10:38,762 INFO L428 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:38,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1633620802, now seen corresponding path program 499 times [2021-03-10 22:10:38,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:38,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118177567] [2021-03-10 22:10:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:38,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118177567] [2021-03-10 22:10:38,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831090229] [2021-03-10 22:10:38,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:39,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:39,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:39,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,083 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-03-10 22:10:39,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:39,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,117 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:10:39,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:39,118 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-03-10 22:10:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:39,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:39,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:39,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136907507] [2021-03-10 22:10:39,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:39,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:39,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:39,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:39,185 INFO L87 Difference]: Start difference. First operand 838 states and 2869 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:39,875 INFO L93 Difference]: Finished difference Result 1526 states and 4720 transitions. [2021-03-10 22:10:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:39,877 INFO L225 Difference]: With dead ends: 1526 [2021-03-10 22:10:39,878 INFO L226 Difference]: Without dead ends: 1526 [2021-03-10 22:10:39,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 635.5ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-03-10 22:10:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 834. [2021-03-10 22:10:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.4273709483793517) internal successors, (2855), 833 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2855 transitions. [2021-03-10 22:10:39,890 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2855 transitions. Word has length 20 [2021-03-10 22:10:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:39,890 INFO L480 AbstractCegarLoop]: Abstraction has 834 states and 2855 transitions. [2021-03-10 22:10:39,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2855 transitions. [2021-03-10 22:10:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:39,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:39,891 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:40,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5473 [2021-03-10 22:10:40,091 INFO L428 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:40,092 INFO L82 PathProgramCache]: Analyzing trace with hash -888519192, now seen corresponding path program 500 times [2021-03-10 22:10:40,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:40,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718308863] [2021-03-10 22:10:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:40,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718308863] [2021-03-10 22:10:40,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997265787] [2021-03-10 22:10:40,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:40,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:40,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:40,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:40,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:40,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:40,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:40,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:40,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:40,418 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-03-10 22:10:40,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:40,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:40,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:40,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:40,452 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-03-10 22:10:40,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:40,453 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:66, output treesize:20 [2021-03-10 22:10:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:40,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:40,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:10:40,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609425802] [2021-03-10 22:10:40,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:40,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:40,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:40,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:40,500 INFO L87 Difference]: Start difference. First operand 834 states and 2855 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:40,896 INFO L93 Difference]: Finished difference Result 1460 states and 4575 transitions. [2021-03-10 22:10:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:10:40,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:40,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:40,898 INFO L225 Difference]: With dead ends: 1460 [2021-03-10 22:10:40,898 INFO L226 Difference]: Without dead ends: 1460 [2021-03-10 22:10:40,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:10:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-03-10 22:10:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 832. [2021-03-10 22:10:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.4296028880866425) internal successors, (2850), 831 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2850 transitions. [2021-03-10 22:10:40,915 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2850 transitions. Word has length 20 [2021-03-10 22:10:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:40,915 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 2850 transitions. [2021-03-10 22:10:40,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2850 transitions. [2021-03-10 22:10:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:40,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:40,916 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:41,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5485 [2021-03-10 22:10:41,116 INFO L428 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:41,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:41,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2020785624, now seen corresponding path program 501 times [2021-03-10 22:10:41,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:41,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296052495] [2021-03-10 22:10:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:41,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296052495] [2021-03-10 22:10:41,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866411383] [2021-03-10 22:10:41,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:41,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:10:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:41,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:41,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:41,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:41,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,395 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-03-10 22:10:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:41,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:41,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,429 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-03-10 22:10:41,429 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-03-10 22:10:41,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:41,430 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-03-10 22:10:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:41,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:41,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:10:41,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134054572] [2021-03-10 22:10:41,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:41,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:41,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:41,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:41,502 INFO L87 Difference]: Start difference. First operand 832 states and 2850 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:41,994 INFO L93 Difference]: Finished difference Result 1517 states and 4742 transitions. [2021-03-10 22:10:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:41,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:41,997 INFO L225 Difference]: With dead ends: 1517 [2021-03-10 22:10:41,997 INFO L226 Difference]: Without dead ends: 1517 [2021-03-10 22:10:41,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-03-10 22:10:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 833. [2021-03-10 22:10:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4278846153846154) internal successors, (2852), 832 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2852 transitions. [2021-03-10 22:10:42,010 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2852 transitions. Word has length 20 [2021-03-10 22:10:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:42,010 INFO L480 AbstractCegarLoop]: Abstraction has 833 states and 2852 transitions. [2021-03-10 22:10:42,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2852 transitions. [2021-03-10 22:10:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:42,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:42,011 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:42,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5500,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:42,215 INFO L428 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash -728443224, now seen corresponding path program 502 times [2021-03-10 22:10:42,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:42,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270403583] [2021-03-10 22:10:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:42,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270403583] [2021-03-10 22:10:42,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001227941] [2021-03-10 22:10:42,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:42,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:42,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:42,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:42,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:42,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:42,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:42,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:42,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:42,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:42,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:42,495 INFO L628 ElimStorePlain]: treesize reduction 13, result has 67.5 percent of original size [2021-03-10 22:10:42,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:42,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:42,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:42,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:42,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-03-10 22:10:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:42,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:42,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:42,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590004721] [2021-03-10 22:10:42,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:42,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:42,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:42,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:42,628 INFO L87 Difference]: Start difference. First operand 833 states and 2852 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:43,198 INFO L93 Difference]: Finished difference Result 1511 states and 4724 transitions. [2021-03-10 22:10:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:43,199 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:43,201 INFO L225 Difference]: With dead ends: 1511 [2021-03-10 22:10:43,201 INFO L226 Difference]: Without dead ends: 1511 [2021-03-10 22:10:43,201 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-03-10 22:10:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 822. [2021-03-10 22:10:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.428745432399513) internal successors, (2815), 821 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2815 transitions. [2021-03-10 22:10:43,213 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2815 transitions. Word has length 20 [2021-03-10 22:10:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:43,213 INFO L480 AbstractCegarLoop]: Abstraction has 822 states and 2815 transitions. [2021-03-10 22:10:43,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2815 transitions. [2021-03-10 22:10:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:43,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:43,214 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:43,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5512,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:43,414 INFO L428 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash -687771078, now seen corresponding path program 503 times [2021-03-10 22:10:43,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:43,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126685581] [2021-03-10 22:10:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:43,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126685581] [2021-03-10 22:10:43,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919971692] [2021-03-10 22:10:43,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:43,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:43,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:43,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:43,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:43,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:43,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:43,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:43,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:43,695 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-03-10 22:10:43,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:43,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:43,727 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-03-10 22:10:43,727 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:10:43,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:43,728 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:10:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:43,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:43,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:43,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214255948] [2021-03-10 22:10:43,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:43,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:43,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:43,807 INFO L87 Difference]: Start difference. First operand 822 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:44,442 INFO L93 Difference]: Finished difference Result 1482 states and 4658 transitions. [2021-03-10 22:10:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:10:44,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:44,445 INFO L225 Difference]: With dead ends: 1482 [2021-03-10 22:10:44,445 INFO L226 Difference]: Without dead ends: 1482 [2021-03-10 22:10:44,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 501.3ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-03-10 22:10:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 819. [2021-03-10 22:10:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4266503667481665) internal successors, (2803), 818 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2803 transitions. [2021-03-10 22:10:44,456 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2803 transitions. Word has length 20 [2021-03-10 22:10:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:44,456 INFO L480 AbstractCegarLoop]: Abstraction has 819 states and 2803 transitions. [2021-03-10 22:10:44,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2803 transitions. [2021-03-10 22:10:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:44,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:44,457 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:44,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5525,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:44,657 INFO L428 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1027461022, now seen corresponding path program 504 times [2021-03-10 22:10:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:44,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920975235] [2021-03-10 22:10:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:44,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920975235] [2021-03-10 22:10:44,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921745310] [2021-03-10 22:10:44,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:44,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:10:44,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:44,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:44,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:44,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:44,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:44,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:44,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:44,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:44,963 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-03-10 22:10:44,964 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:10:44,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:44,965 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:10:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:45,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:45,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:10:45,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210061632] [2021-03-10 22:10:45,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:45,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:45,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:45,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:45,029 INFO L87 Difference]: Start difference. First operand 819 states and 2803 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:45,421 INFO L93 Difference]: Finished difference Result 1304 states and 4144 transitions. [2021-03-10 22:10:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:45,424 INFO L225 Difference]: With dead ends: 1304 [2021-03-10 22:10:45,424 INFO L226 Difference]: Without dead ends: 1298 [2021-03-10 22:10:45,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-03-10 22:10:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 833. [2021-03-10 22:10:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4158653846153846) internal successors, (2842), 832 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2842 transitions. [2021-03-10 22:10:45,435 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2842 transitions. Word has length 20 [2021-03-10 22:10:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:45,435 INFO L480 AbstractCegarLoop]: Abstraction has 833 states and 2842 transitions. [2021-03-10 22:10:45,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2842 transitions. [2021-03-10 22:10:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:45,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:45,436 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:45,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5535,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:45,636 INFO L428 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:45,636 INFO L82 PathProgramCache]: Analyzing trace with hash -887962904, now seen corresponding path program 505 times [2021-03-10 22:10:45,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:45,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167094597] [2021-03-10 22:10:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:45,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167094597] [2021-03-10 22:10:45,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875515875] [2021-03-10 22:10:45,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:45,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:45,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:45,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:45,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:45,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,899 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:10:45,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:45,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:45,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:45,915 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:10:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:45,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:45,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:10:45,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364395120] [2021-03-10 22:10:45,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:45,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:45,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:45,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:45,975 INFO L87 Difference]: Start difference. First operand 833 states and 2842 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:47,056 INFO L93 Difference]: Finished difference Result 1569 states and 4775 transitions. [2021-03-10 22:10:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:10:47,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:47,059 INFO L225 Difference]: With dead ends: 1569 [2021-03-10 22:10:47,059 INFO L226 Difference]: Without dead ends: 1569 [2021-03-10 22:10:47,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 877.9ms TimeCoverageRelationStatistics Valid=249, Invalid=621, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:10:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-03-10 22:10:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 831. [2021-03-10 22:10:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.4180722891566266) internal successors, (2837), 830 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2837 transitions. [2021-03-10 22:10:47,072 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2837 transitions. Word has length 20 [2021-03-10 22:10:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:47,072 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2837 transitions. [2021-03-10 22:10:47,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2837 transitions. [2021-03-10 22:10:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:47,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:47,073 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:47,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5547,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:47,273 INFO L428 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:47,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:47,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2078306972, now seen corresponding path program 506 times [2021-03-10 22:10:47,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:47,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595613068] [2021-03-10 22:10:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:47,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595613068] [2021-03-10 22:10:47,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502062844] [2021-03-10 22:10:47,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:47,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:47,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:47,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:47,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:47,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:47,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:47,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:47,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:47,562 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.5 percent of original size [2021-03-10 22:10:47,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:47,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:47,597 INFO L628 ElimStorePlain]: treesize reduction 10, result has 73.0 percent of original size [2021-03-10 22:10:47,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:47,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:47,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:47,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:47,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-03-10 22:10:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:47,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:47,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:10:47,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614252996] [2021-03-10 22:10:47,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:10:47,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:10:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:10:47,661 INFO L87 Difference]: Start difference. First operand 831 states and 2837 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:48,121 INFO L93 Difference]: Finished difference Result 1360 states and 4290 transitions. [2021-03-10 22:10:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:10:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:48,124 INFO L225 Difference]: With dead ends: 1360 [2021-03-10 22:10:48,124 INFO L226 Difference]: Without dead ends: 1360 [2021-03-10 22:10:48,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-03-10 22:10:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 819. [2021-03-10 22:10:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4266503667481665) internal successors, (2803), 818 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2803 transitions. [2021-03-10 22:10:48,134 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2803 transitions. Word has length 20 [2021-03-10 22:10:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:48,135 INFO L480 AbstractCegarLoop]: Abstraction has 819 states and 2803 transitions. [2021-03-10 22:10:48,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2803 transitions. [2021-03-10 22:10:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:48,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:48,136 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:48,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5557,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:48,336 INFO L428 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:48,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1100569644, now seen corresponding path program 507 times [2021-03-10 22:10:48,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:48,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707821990] [2021-03-10 22:10:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:48,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707821990] [2021-03-10 22:10:48,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427111281] [2021-03-10 22:10:48,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:48,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:10:48,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:48,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:48,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:48,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:48,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:48,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:48,718 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-03-10 22:10:48,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:48,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:48,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:48,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:48,758 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-03-10 22:10:48,758 INFO L518 ElimStorePlain]: Eliminatee v_prenex_38 vanished before elimination [2021-03-10 22:10:48,758 INFO L518 ElimStorePlain]: Eliminatee v_prenex_37 vanished before elimination [2021-03-10 22:10:48,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:48,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:90, output treesize:20 [2021-03-10 22:10:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:48,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:48,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:48,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823888720] [2021-03-10 22:10:48,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:48,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:48,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:48,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:48,863 INFO L87 Difference]: Start difference. First operand 819 states and 2803 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:49,368 INFO L93 Difference]: Finished difference Result 1308 states and 4183 transitions. [2021-03-10 22:10:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:10:49,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:49,371 INFO L225 Difference]: With dead ends: 1308 [2021-03-10 22:10:49,371 INFO L226 Difference]: Without dead ends: 1308 [2021-03-10 22:10:49,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-03-10 22:10:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 820. [2021-03-10 22:10:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.4249084249084247) internal successors, (2805), 819 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2805 transitions. [2021-03-10 22:10:49,381 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2805 transitions. Word has length 20 [2021-03-10 22:10:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:49,381 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 2805 transitions. [2021-03-10 22:10:49,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2805 transitions. [2021-03-10 22:10:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:49,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:49,382 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:49,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5569 [2021-03-10 22:10:49,583 INFO L428 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1570059884, now seen corresponding path program 508 times [2021-03-10 22:10:49,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:49,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872539880] [2021-03-10 22:10:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:49,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872539880] [2021-03-10 22:10:49,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803210511] [2021-03-10 22:10:49,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:49,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:49,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:49,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:49,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:49,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:49,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:49,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:49,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:49,898 INFO L628 ElimStorePlain]: treesize reduction 44, result has 47.6 percent of original size [2021-03-10 22:10:49,898 INFO L518 ElimStorePlain]: Eliminatee v_prenex_42 vanished before elimination [2021-03-10 22:10:49,898 INFO L518 ElimStorePlain]: Eliminatee v_prenex_41 vanished before elimination [2021-03-10 22:10:49,899 INFO L518 ElimStorePlain]: Eliminatee v_prenex_40 vanished before elimination [2021-03-10 22:10:49,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:49,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:49,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:49,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:49,924 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:10:49,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:49,924 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:108, output treesize:20 [2021-03-10 22:10:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:49,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:49,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:10:49,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934185448] [2021-03-10 22:10:49,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:49,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:49,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:49,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:49,993 INFO L87 Difference]: Start difference. First operand 820 states and 2805 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:50,592 INFO L93 Difference]: Finished difference Result 1320 states and 4213 transitions. [2021-03-10 22:10:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:10:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:50,595 INFO L225 Difference]: With dead ends: 1320 [2021-03-10 22:10:50,595 INFO L226 Difference]: Without dead ends: 1320 [2021-03-10 22:10:50,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 575.6ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-03-10 22:10:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 817. [2021-03-10 22:10:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.4191176470588234) internal successors, (2790), 816 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2790 transitions. [2021-03-10 22:10:50,612 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2790 transitions. Word has length 20 [2021-03-10 22:10:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:50,612 INFO L480 AbstractCegarLoop]: Abstraction has 817 states and 2790 transitions. [2021-03-10 22:10:50,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2790 transitions. [2021-03-10 22:10:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:50,613 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:50,613 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:50,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5582 [2021-03-10 22:10:50,814 INFO L428 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash -529824086, now seen corresponding path program 509 times [2021-03-10 22:10:50,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:50,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817865040] [2021-03-10 22:10:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:50,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817865040] [2021-03-10 22:10:50,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24569049] [2021-03-10 22:10:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:50,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:10:50,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:51,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:51,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:51,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,148 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-03-10 22:10:51,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:10:51,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,184 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:10:51,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:51,186 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-03-10 22:10:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:51,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:51,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:51,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481180726] [2021-03-10 22:10:51,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:51,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:51,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:51,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:51,254 INFO L87 Difference]: Start difference. First operand 817 states and 2790 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:51,726 INFO L93 Difference]: Finished difference Result 1314 states and 4187 transitions. [2021-03-10 22:10:51,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:10:51,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:51,729 INFO L225 Difference]: With dead ends: 1314 [2021-03-10 22:10:51,729 INFO L226 Difference]: Without dead ends: 1314 [2021-03-10 22:10:51,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 439.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:51,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-03-10 22:10:51,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 803. [2021-03-10 22:10:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.4251870324189526) internal successors, (2747), 802 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2747 transitions. [2021-03-10 22:10:51,740 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2747 transitions. Word has length 20 [2021-03-10 22:10:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:51,740 INFO L480 AbstractCegarLoop]: Abstraction has 803 states and 2747 transitions. [2021-03-10 22:10:51,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2747 transitions. [2021-03-10 22:10:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:51,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:51,741 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:51,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5595 [2021-03-10 22:10:51,941 INFO L428 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:51,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:51,941 INFO L82 PathProgramCache]: Analyzing trace with hash 268626584, now seen corresponding path program 510 times [2021-03-10 22:10:51,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:51,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506172220] [2021-03-10 22:10:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:52,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506172220] [2021-03-10 22:10:52,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693008778] [2021-03-10 22:10:52,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:52,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:10:52,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:52,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:52,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:52,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:10:52,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331478500] [2021-03-10 22:10:52,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:52,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:52,293 INFO L87 Difference]: Start difference. First operand 803 states and 2747 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:52,897 INFO L93 Difference]: Finished difference Result 1055 states and 3411 transitions. [2021-03-10 22:10:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:52,898 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:52,899 INFO L225 Difference]: With dead ends: 1055 [2021-03-10 22:10:52,899 INFO L226 Difference]: Without dead ends: 1055 [2021-03-10 22:10:52,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-03-10 22:10:52,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 806. [2021-03-10 22:10:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.422360248447205) internal successors, (2755), 805 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2755 transitions. [2021-03-10 22:10:52,908 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2755 transitions. Word has length 20 [2021-03-10 22:10:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:52,908 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2755 transitions. [2021-03-10 22:10:52,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2755 transitions. [2021-03-10 22:10:52,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:52,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:52,909 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:53,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5606,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:53,110 INFO L428 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:53,110 INFO L82 PathProgramCache]: Analyzing trace with hash 976984802, now seen corresponding path program 511 times [2021-03-10 22:10:53,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:53,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761718871] [2021-03-10 22:10:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:53,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761718871] [2021-03-10 22:10:53,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621669326] [2021-03-10 22:10:53,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:53,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:53,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:53,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:53,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:10:53,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816058517] [2021-03-10 22:10:53,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:53,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:53,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:53,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:53,382 INFO L87 Difference]: Start difference. First operand 806 states and 2755 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:53,845 INFO L93 Difference]: Finished difference Result 1149 states and 3659 transitions. [2021-03-10 22:10:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:53,847 INFO L225 Difference]: With dead ends: 1149 [2021-03-10 22:10:53,847 INFO L226 Difference]: Without dead ends: 1149 [2021-03-10 22:10:53,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 375.7ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-03-10 22:10:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 803. [2021-03-10 22:10:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.4251870324189526) internal successors, (2747), 802 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2747 transitions. [2021-03-10 22:10:53,857 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2747 transitions. Word has length 20 [2021-03-10 22:10:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:53,857 INFO L480 AbstractCegarLoop]: Abstraction has 803 states and 2747 transitions. [2021-03-10 22:10:53,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2747 transitions. [2021-03-10 22:10:53,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:53,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:53,858 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:54,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5608,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:54,058 INFO L428 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:54,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1129799318, now seen corresponding path program 512 times [2021-03-10 22:10:54,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:54,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081695869] [2021-03-10 22:10:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:54,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081695869] [2021-03-10 22:10:54,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926353584] [2021-03-10 22:10:54,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:54,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:54,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:54,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:54,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:10:54,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211332499] [2021-03-10 22:10:54,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:54,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:54,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:54,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:54,363 INFO L87 Difference]: Start difference. First operand 803 states and 2747 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:54,679 INFO L93 Difference]: Finished difference Result 1083 states and 3467 transitions. [2021-03-10 22:10:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:54,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:54,685 INFO L225 Difference]: With dead ends: 1083 [2021-03-10 22:10:54,685 INFO L226 Difference]: Without dead ends: 1083 [2021-03-10 22:10:54,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:10:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-03-10 22:10:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 809. [2021-03-10 22:10:54,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.4232673267326734) internal successors, (2766), 808 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2766 transitions. [2021-03-10 22:10:54,695 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2766 transitions. Word has length 20 [2021-03-10 22:10:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:54,695 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 2766 transitions. [2021-03-10 22:10:54,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:54,695 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2766 transitions. [2021-03-10 22:10:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:54,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:54,696 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:54,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5613 [2021-03-10 22:10:54,896 INFO L428 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:54,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash 230317422, now seen corresponding path program 513 times [2021-03-10 22:10:54,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:54,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170172646] [2021-03-10 22:10:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:54,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170172646] [2021-03-10 22:10:54,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488128308] [2021-03-10 22:10:54,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:55,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:10:55,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:55,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:55,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:55,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:10:55,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609315584] [2021-03-10 22:10:55,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:55,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:55,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:55,150 INFO L87 Difference]: Start difference. First operand 809 states and 2766 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:55,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:55,465 INFO L93 Difference]: Finished difference Result 1082 states and 3478 transitions. [2021-03-10 22:10:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:10:55,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:55,467 INFO L225 Difference]: With dead ends: 1082 [2021-03-10 22:10:55,467 INFO L226 Difference]: Without dead ends: 1082 [2021-03-10 22:10:55,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-03-10 22:10:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 812. [2021-03-10 22:10:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.4315659679408137) internal successors, (2783), 811 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2783 transitions. [2021-03-10 22:10:55,477 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2783 transitions. Word has length 20 [2021-03-10 22:10:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:55,477 INFO L480 AbstractCegarLoop]: Abstraction has 812 states and 2783 transitions. [2021-03-10 22:10:55,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2783 transitions. [2021-03-10 22:10:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:55,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:55,478 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:55,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5618,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:55,678 INFO L428 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:55,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:55,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2085851462, now seen corresponding path program 514 times [2021-03-10 22:10:55,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:55,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665572702] [2021-03-10 22:10:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:55,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665572702] [2021-03-10 22:10:55,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100624227] [2021-03-10 22:10:55,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:55,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:55,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:55,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:55,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:55,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:10:55,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927919135] [2021-03-10 22:10:55,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:55,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:55,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:55,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:55,973 INFO L87 Difference]: Start difference. First operand 812 states and 2783 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:56,316 INFO L93 Difference]: Finished difference Result 980 states and 3231 transitions. [2021-03-10 22:10:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:56,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:56,319 INFO L225 Difference]: With dead ends: 980 [2021-03-10 22:10:56,319 INFO L226 Difference]: Without dead ends: 968 [2021-03-10 22:10:56,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-03-10 22:10:56,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 812. [2021-03-10 22:10:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.4278668310727496) internal successors, (2780), 811 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:56,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2780 transitions. [2021-03-10 22:10:56,327 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2780 transitions. Word has length 20 [2021-03-10 22:10:56,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:56,328 INFO L480 AbstractCegarLoop]: Abstraction has 812 states and 2780 transitions. [2021-03-10 22:10:56,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:56,328 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2780 transitions. [2021-03-10 22:10:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:56,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:56,329 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:56,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5624 [2021-03-10 22:10:56,529 INFO L428 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1915853338, now seen corresponding path program 515 times [2021-03-10 22:10:56,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:56,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364469675] [2021-03-10 22:10:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:56,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364469675] [2021-03-10 22:10:56,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542266665] [2021-03-10 22:10:56,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:56,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:10:56,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:56,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:56,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:56,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:56,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:10:56,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559929504] [2021-03-10 22:10:56,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:10:56,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:56,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:10:56,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:10:56,809 INFO L87 Difference]: Start difference. First operand 812 states and 2780 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:57,078 INFO L93 Difference]: Finished difference Result 989 states and 3255 transitions. [2021-03-10 22:10:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:10:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:57,080 INFO L225 Difference]: With dead ends: 989 [2021-03-10 22:10:57,080 INFO L226 Difference]: Without dead ends: 989 [2021-03-10 22:10:57,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-03-10 22:10:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 800. [2021-03-10 22:10:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.4280350438047558) internal successors, (2739), 799 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2739 transitions. [2021-03-10 22:10:57,089 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2739 transitions. Word has length 20 [2021-03-10 22:10:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:57,089 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 2739 transitions. [2021-03-10 22:10:57,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2739 transitions. [2021-03-10 22:10:57,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:57,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:57,090 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:57,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5628,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:57,290 INFO L428 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:57,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:57,290 INFO L82 PathProgramCache]: Analyzing trace with hash 809941774, now seen corresponding path program 516 times [2021-03-10 22:10:57,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:57,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83113713] [2021-03-10 22:10:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:57,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83113713] [2021-03-10 22:10:57,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413383751] [2021-03-10 22:10:57,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:57,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:10:57,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:57,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:57,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:57,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:57,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928087170] [2021-03-10 22:10:57,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:57,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:57,625 INFO L87 Difference]: Start difference. First operand 800 states and 2739 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:58,167 INFO L93 Difference]: Finished difference Result 1185 states and 3736 transitions. [2021-03-10 22:10:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:58,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:58,169 INFO L225 Difference]: With dead ends: 1185 [2021-03-10 22:10:58,169 INFO L226 Difference]: Without dead ends: 1185 [2021-03-10 22:10:58,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-03-10 22:10:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 807. [2021-03-10 22:10:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.4292803970223327) internal successors, (2764), 806 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2764 transitions. [2021-03-10 22:10:58,179 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2764 transitions. Word has length 20 [2021-03-10 22:10:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:58,179 INFO L480 AbstractCegarLoop]: Abstraction has 807 states and 2764 transitions. [2021-03-10 22:10:58,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2764 transitions. [2021-03-10 22:10:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:58,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:58,180 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:58,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5630 [2021-03-10 22:10:58,381 INFO L428 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1518299992, now seen corresponding path program 517 times [2021-03-10 22:10:58,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:58,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127071618] [2021-03-10 22:10:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:58,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127071618] [2021-03-10 22:10:58,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157865417] [2021-03-10 22:10:58,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:58,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:58,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:58,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118598378] [2021-03-10 22:10:58,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:58,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:58,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:58,662 INFO L87 Difference]: Start difference. First operand 807 states and 2764 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:59,397 INFO L93 Difference]: Finished difference Result 1357 states and 4149 transitions. [2021-03-10 22:10:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:10:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:59,400 INFO L225 Difference]: With dead ends: 1357 [2021-03-10 22:10:59,400 INFO L226 Difference]: Without dead ends: 1357 [2021-03-10 22:10:59,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:10:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-03-10 22:10:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 807. [2021-03-10 22:10:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.436724565756824) internal successors, (2770), 806 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2770 transitions. [2021-03-10 22:10:59,411 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2770 transitions. Word has length 20 [2021-03-10 22:10:59,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:59,411 INFO L480 AbstractCegarLoop]: Abstraction has 807 states and 2770 transitions. [2021-03-10 22:10:59,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:59,411 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2770 transitions. [2021-03-10 22:10:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:59,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:59,412 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:59,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5635,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:59,613 INFO L428 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash -651698044, now seen corresponding path program 518 times [2021-03-10 22:10:59,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:59,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296110644] [2021-03-10 22:10:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:59,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296110644] [2021-03-10 22:10:59,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649842429] [2021-03-10 22:10:59,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:59,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:59,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:10:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:59,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:59,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:10:59,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593940840] [2021-03-10 22:10:59,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:10:59,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:10:59,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:10:59,959 INFO L87 Difference]: Start difference. First operand 807 states and 2770 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:00,484 INFO L93 Difference]: Finished difference Result 1042 states and 3378 transitions. [2021-03-10 22:11:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:00,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:00,487 INFO L225 Difference]: With dead ends: 1042 [2021-03-10 22:11:00,487 INFO L226 Difference]: Without dead ends: 1028 [2021-03-10 22:11:00,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-03-10 22:11:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 805. [2021-03-10 22:11:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.43407960199005) internal successors, (2761), 804 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2761 transitions. [2021-03-10 22:11:00,502 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2761 transitions. Word has length 20 [2021-03-10 22:11:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:00,502 INFO L480 AbstractCegarLoop]: Abstraction has 805 states and 2761 transitions. [2021-03-10 22:11:00,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2761 transitions. [2021-03-10 22:11:00,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:00,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:00,504 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:00,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5642,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:00,704 INFO L428 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1666448424, now seen corresponding path program 519 times [2021-03-10 22:11:00,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:00,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598950681] [2021-03-10 22:11:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:00,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598950681] [2021-03-10 22:11:00,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123196091] [2021-03-10 22:11:00,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:00,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:11:00,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:00,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:01,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:01,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:01,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762538090] [2021-03-10 22:11:01,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:01,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:01,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:01,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:01,090 INFO L87 Difference]: Start difference. First operand 805 states and 2761 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:01,579 INFO L93 Difference]: Finished difference Result 1142 states and 3636 transitions. [2021-03-10 22:11:01,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:01,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:01,582 INFO L225 Difference]: With dead ends: 1142 [2021-03-10 22:11:01,582 INFO L226 Difference]: Without dead ends: 1142 [2021-03-10 22:11:01,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-03-10 22:11:01,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 801. [2021-03-10 22:11:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.43125) internal successors, (2745), 800 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2745 transitions. [2021-03-10 22:11:01,592 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2745 transitions. Word has length 20 [2021-03-10 22:11:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:01,592 INFO L480 AbstractCegarLoop]: Abstraction has 801 states and 2745 transitions. [2021-03-10 22:11:01,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2745 transitions. [2021-03-10 22:11:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:01,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:01,593 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:01,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5652 [2021-03-10 22:11:01,793 INFO L428 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash -483682344, now seen corresponding path program 520 times [2021-03-10 22:11:01,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:01,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009640342] [2021-03-10 22:11:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:01,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009640342] [2021-03-10 22:11:01,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183319589] [2021-03-10 22:11:01,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:01,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:01,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:01,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:02,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:02,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:02,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418440230] [2021-03-10 22:11:02,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:02,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:02,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:02,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:02,239 INFO L87 Difference]: Start difference. First operand 801 states and 2745 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:02,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:02,808 INFO L93 Difference]: Finished difference Result 1154 states and 3665 transitions. [2021-03-10 22:11:02,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:02,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:02,810 INFO L225 Difference]: With dead ends: 1154 [2021-03-10 22:11:02,810 INFO L226 Difference]: Without dead ends: 1154 [2021-03-10 22:11:02,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 501.3ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-03-10 22:11:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 804. [2021-03-10 22:11:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.4371108343711083) internal successors, (2760), 803 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2760 transitions. [2021-03-10 22:11:02,820 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2760 transitions. Word has length 20 [2021-03-10 22:11:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:02,820 INFO L480 AbstractCegarLoop]: Abstraction has 804 states and 2760 transitions. [2021-03-10 22:11:02,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2760 transitions. [2021-03-10 22:11:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:02,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:02,821 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:03,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5656,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:03,021 INFO L428 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1854147996, now seen corresponding path program 521 times [2021-03-10 22:11:03,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:03,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615137359] [2021-03-10 22:11:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:03,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615137359] [2021-03-10 22:11:03,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929442559] [2021-03-10 22:11:03,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:03,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:03,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:03,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:03,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:03,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:03,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:03,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818366804] [2021-03-10 22:11:03,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:03,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:03,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:03,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:03,321 INFO L87 Difference]: Start difference. First operand 804 states and 2760 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:03,754 INFO L93 Difference]: Finished difference Result 1121 states and 3588 transitions. [2021-03-10 22:11:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:03,757 INFO L225 Difference]: With dead ends: 1121 [2021-03-10 22:11:03,757 INFO L226 Difference]: Without dead ends: 1121 [2021-03-10 22:11:03,757 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-03-10 22:11:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 798. [2021-03-10 22:11:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.42534504391468) internal successors, (2730), 797 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2730 transitions. [2021-03-10 22:11:03,766 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2730 transitions. Word has length 20 [2021-03-10 22:11:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:03,766 INFO L480 AbstractCegarLoop]: Abstraction has 798 states and 2730 transitions. [2021-03-10 22:11:03,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2730 transitions. [2021-03-10 22:11:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:03,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:03,767 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:03,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5664,550 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:03,968 INFO L428 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1345648214, now seen corresponding path program 522 times [2021-03-10 22:11:03,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:03,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795216394] [2021-03-10 22:11:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:04,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795216394] [2021-03-10 22:11:04,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137434516] [2021-03-10 22:11:04,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:04,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:11:04,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:04,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:04,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:04,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:04,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:04,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892058748] [2021-03-10 22:11:04,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:04,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:04,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:04,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:04,319 INFO L87 Difference]: Start difference. First operand 798 states and 2730 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:05,339 INFO L93 Difference]: Finished difference Result 1350 states and 4160 transitions. [2021-03-10 22:11:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:11:05,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:05,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:05,341 INFO L225 Difference]: With dead ends: 1350 [2021-03-10 22:11:05,341 INFO L226 Difference]: Without dead ends: 1350 [2021-03-10 22:11:05,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 861.5ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:11:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-03-10 22:11:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 802. [2021-03-10 22:11:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.4332084893882646) internal successors, (2750), 801 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2750 transitions. [2021-03-10 22:11:05,352 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2750 transitions. Word has length 20 [2021-03-10 22:11:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:05,352 INFO L480 AbstractCegarLoop]: Abstraction has 802 states and 2750 transitions. [2021-03-10 22:11:05,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2750 transitions. [2021-03-10 22:11:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:05,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:05,353 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:05,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5670 [2021-03-10 22:11:05,554 INFO L428 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1657294372, now seen corresponding path program 523 times [2021-03-10 22:11:05,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:05,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711109325] [2021-03-10 22:11:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:05,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711109325] [2021-03-10 22:11:05,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733216024] [2021-03-10 22:11:05,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:05,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:05,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:05,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:05,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325053409] [2021-03-10 22:11:05,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:05,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:05,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:05,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:05,908 INFO L87 Difference]: Start difference. First operand 802 states and 2750 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:06,428 INFO L93 Difference]: Finished difference Result 1141 states and 3612 transitions. [2021-03-10 22:11:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:06,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:06,430 INFO L225 Difference]: With dead ends: 1141 [2021-03-10 22:11:06,430 INFO L226 Difference]: Without dead ends: 1141 [2021-03-10 22:11:06,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-03-10 22:11:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 798. [2021-03-10 22:11:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4328732747804267) internal successors, (2736), 797 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2736 transitions. [2021-03-10 22:11:06,440 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2736 transitions. Word has length 20 [2021-03-10 22:11:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:06,440 INFO L480 AbstractCegarLoop]: Abstraction has 798 states and 2736 transitions. [2021-03-10 22:11:06,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2736 transitions. [2021-03-10 22:11:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:06,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:06,441 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:06,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5676,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:06,641 INFO L428 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash -594247776, now seen corresponding path program 524 times [2021-03-10 22:11:06,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:06,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713089351] [2021-03-10 22:11:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:06,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713089351] [2021-03-10 22:11:06,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146664109] [2021-03-10 22:11:06,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:06,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:06,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:06,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:07,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:07,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:07,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879632657] [2021-03-10 22:11:07,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:07,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:07,017 INFO L87 Difference]: Start difference. First operand 798 states and 2736 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:07,849 INFO L93 Difference]: Finished difference Result 1214 states and 3849 transitions. [2021-03-10 22:11:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:11:07,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:07,851 INFO L225 Difference]: With dead ends: 1214 [2021-03-10 22:11:07,851 INFO L226 Difference]: Without dead ends: 1214 [2021-03-10 22:11:07,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-03-10 22:11:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 797. [2021-03-10 22:11:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.430904522613065) internal successors, (2731), 796 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2731 transitions. [2021-03-10 22:11:07,861 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2731 transitions. Word has length 20 [2021-03-10 22:11:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:07,861 INFO L480 AbstractCegarLoop]: Abstraction has 797 states and 2731 transitions. [2021-03-10 22:11:07,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2731 transitions. [2021-03-10 22:11:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:07,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:07,862 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:08,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5688,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:08,062 INFO L428 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:08,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:08,063 INFO L82 PathProgramCache]: Analyzing trace with hash 698094624, now seen corresponding path program 525 times [2021-03-10 22:11:08,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:08,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12249647] [2021-03-10 22:11:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:08,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12249647] [2021-03-10 22:11:08,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965198711] [2021-03-10 22:11:08,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:08,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:11:08,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:08,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:08,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:08,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:08,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:08,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549255468] [2021-03-10 22:11:08,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:08,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:08,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:08,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:08,383 INFO L87 Difference]: Start difference. First operand 797 states and 2731 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:09,068 INFO L93 Difference]: Finished difference Result 1206 states and 3827 transitions. [2021-03-10 22:11:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:09,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:09,070 INFO L225 Difference]: With dead ends: 1206 [2021-03-10 22:11:09,070 INFO L226 Difference]: Without dead ends: 1206 [2021-03-10 22:11:09,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 564.0ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-03-10 22:11:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 794. [2021-03-10 22:11:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 3.4249684741488022) internal successors, (2716), 793 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2716 transitions. [2021-03-10 22:11:09,085 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2716 transitions. Word has length 20 [2021-03-10 22:11:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:09,085 INFO L480 AbstractCegarLoop]: Abstraction has 794 states and 2716 transitions. [2021-03-10 22:11:09,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2716 transitions. [2021-03-10 22:11:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:09,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:09,086 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:09,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5697,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:09,286 INFO L428 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:09,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1806032122, now seen corresponding path program 526 times [2021-03-10 22:11:09,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:09,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593170145] [2021-03-10 22:11:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:09,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593170145] [2021-03-10 22:11:09,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578086616] [2021-03-10 22:11:09,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:09,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:09,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:09,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:09,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:09,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:09,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:09,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780130229] [2021-03-10 22:11:09,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:09,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:09,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:09,594 INFO L87 Difference]: Start difference. First operand 794 states and 2716 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:10,036 INFO L93 Difference]: Finished difference Result 1136 states and 3626 transitions. [2021-03-10 22:11:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:10,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:10,039 INFO L225 Difference]: With dead ends: 1136 [2021-03-10 22:11:10,039 INFO L226 Difference]: Without dead ends: 1136 [2021-03-10 22:11:10,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-03-10 22:11:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 794. [2021-03-10 22:11:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 3.4249684741488022) internal successors, (2716), 793 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2716 transitions. [2021-03-10 22:11:10,049 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2716 transitions. Word has length 20 [2021-03-10 22:11:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:10,049 INFO L480 AbstractCegarLoop]: Abstraction has 794 states and 2716 transitions. [2021-03-10 22:11:10,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2716 transitions. [2021-03-10 22:11:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:10,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:10,050 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:10,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5705,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:10,250 INFO L428 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:10,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:10,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1546420868, now seen corresponding path program 527 times [2021-03-10 22:11:10,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:10,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453581868] [2021-03-10 22:11:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:10,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453581868] [2021-03-10 22:11:10,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710853715] [2021-03-10 22:11:10,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:10,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:10,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:10,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:10,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:10,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:10,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:10,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213368775] [2021-03-10 22:11:10,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:10,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:10,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:10,601 INFO L87 Difference]: Start difference. First operand 794 states and 2716 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:11,064 INFO L93 Difference]: Finished difference Result 1022 states and 3337 transitions. [2021-03-10 22:11:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:11,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:11,067 INFO L225 Difference]: With dead ends: 1022 [2021-03-10 22:11:11,067 INFO L226 Difference]: Without dead ends: 1022 [2021-03-10 22:11:11,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-03-10 22:11:11,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 791. [2021-03-10 22:11:11,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4151898734177215) internal successors, (2698), 790 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2698 transitions. [2021-03-10 22:11:11,076 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2698 transitions. Word has length 20 [2021-03-10 22:11:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:11,076 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 2698 transitions. [2021-03-10 22:11:11,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2698 transitions. [2021-03-10 22:11:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:11,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:11,077 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:11,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5713,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:11,277 INFO L428 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:11,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:11,277 INFO L82 PathProgramCache]: Analyzing trace with hash 282119512, now seen corresponding path program 528 times [2021-03-10 22:11:11,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:11,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442034089] [2021-03-10 22:11:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442034089] [2021-03-10 22:11:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617811634] [2021-03-10 22:11:11,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:11,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:11:11,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:11,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:11,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:11,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:11,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:11,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080417988] [2021-03-10 22:11:11,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:11,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:11,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:11,633 INFO L87 Difference]: Start difference. First operand 791 states and 2698 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:12,298 INFO L93 Difference]: Finished difference Result 1133 states and 3572 transitions. [2021-03-10 22:11:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:12,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:12,300 INFO L225 Difference]: With dead ends: 1133 [2021-03-10 22:11:12,300 INFO L226 Difference]: Without dead ends: 1133 [2021-03-10 22:11:12,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:12,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-03-10 22:11:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 794. [2021-03-10 22:11:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 3.416141235813367) internal successors, (2709), 793 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2709 transitions. [2021-03-10 22:11:12,309 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2709 transitions. Word has length 20 [2021-03-10 22:11:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:12,309 INFO L480 AbstractCegarLoop]: Abstraction has 794 states and 2709 transitions. [2021-03-10 22:11:12,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2709 transitions. [2021-03-10 22:11:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:12,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:12,310 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:12,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5723,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:12,511 INFO L428 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:12,511 INFO L82 PathProgramCache]: Analyzing trace with hash -673932632, now seen corresponding path program 529 times [2021-03-10 22:11:12,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:12,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729349884] [2021-03-10 22:11:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:12,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729349884] [2021-03-10 22:11:12,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895927450] [2021-03-10 22:11:12,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:12,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:12,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:12,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:12,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277866869] [2021-03-10 22:11:12,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:12,916 INFO L87 Difference]: Start difference. First operand 794 states and 2709 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:13,297 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:11:13,427 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:11:13,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:13,684 INFO L93 Difference]: Finished difference Result 982 states and 3210 transitions. [2021-03-10 22:11:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:13,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:13,686 INFO L225 Difference]: With dead ends: 982 [2021-03-10 22:11:13,686 INFO L226 Difference]: Without dead ends: 970 [2021-03-10 22:11:13,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 733.5ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:13,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-03-10 22:11:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 794. [2021-03-10 22:11:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 3.412358133669609) internal successors, (2706), 793 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2706 transitions. [2021-03-10 22:11:13,695 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2706 transitions. Word has length 20 [2021-03-10 22:11:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:13,695 INFO L480 AbstractCegarLoop]: Abstraction has 794 states and 2706 transitions. [2021-03-10 22:11:13,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2706 transitions. [2021-03-10 22:11:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:13,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:13,696 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:13,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5731,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:13,897 INFO L428 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash -503934508, now seen corresponding path program 530 times [2021-03-10 22:11:13,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:13,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835678160] [2021-03-10 22:11:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:13,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835678160] [2021-03-10 22:11:13,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603008466] [2021-03-10 22:11:13,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:14,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:14,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:14,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:14,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:14,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:14,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:11:14,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362168662] [2021-03-10 22:11:14,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:11:14,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:14,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:11:14,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:11:14,216 INFO L87 Difference]: Start difference. First operand 794 states and 2706 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:14,654 INFO L93 Difference]: Finished difference Result 1009 states and 3298 transitions. [2021-03-10 22:11:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:14,657 INFO L225 Difference]: With dead ends: 1009 [2021-03-10 22:11:14,657 INFO L226 Difference]: Without dead ends: 1009 [2021-03-10 22:11:14,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-03-10 22:11:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 795. [2021-03-10 22:11:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.4193954659949624) internal successors, (2715), 794 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2715 transitions. [2021-03-10 22:11:14,666 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2715 transitions. Word has length 20 [2021-03-10 22:11:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:14,666 INFO L480 AbstractCegarLoop]: Abstraction has 795 states and 2715 transitions. [2021-03-10 22:11:14,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2715 transitions. [2021-03-10 22:11:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:14,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:14,667 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:14,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5739 [2021-03-10 22:11:14,867 INFO L428 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:14,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2100696610, now seen corresponding path program 531 times [2021-03-10 22:11:14,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:14,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791394227] [2021-03-10 22:11:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:14,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791394227] [2021-03-10 22:11:14,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299285704] [2021-03-10 22:11:14,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:15,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:11:15,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:15,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:15,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:15,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:15,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063382380] [2021-03-10 22:11:15,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:15,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:15,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:15,257 INFO L87 Difference]: Start difference. First operand 795 states and 2715 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:16,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:16,014 INFO L93 Difference]: Finished difference Result 1349 states and 4095 transitions. [2021-03-10 22:11:16,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:16,016 INFO L225 Difference]: With dead ends: 1349 [2021-03-10 22:11:16,016 INFO L226 Difference]: Without dead ends: 1349 [2021-03-10 22:11:16,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 686.6ms TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:11:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-03-10 22:11:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 800. [2021-03-10 22:11:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.430538172715895) internal successors, (2741), 799 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2741 transitions. [2021-03-10 22:11:16,028 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2741 transitions. Word has length 20 [2021-03-10 22:11:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:16,028 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 2741 transitions. [2021-03-10 22:11:16,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2741 transitions. [2021-03-10 22:11:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:16,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:16,029 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:16,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5743,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:16,229 INFO L428 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:16,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1789050452, now seen corresponding path program 532 times [2021-03-10 22:11:16,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:16,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873861887] [2021-03-10 22:11:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:16,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873861887] [2021-03-10 22:11:16,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181058682] [2021-03-10 22:11:16,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:16,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:16,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:16,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:16,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:16,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:16,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:16,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767533261] [2021-03-10 22:11:16,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:16,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:16,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:16,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:16,545 INFO L87 Difference]: Start difference. First operand 800 states and 2741 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:16,952 INFO L93 Difference]: Finished difference Result 1170 states and 3715 transitions. [2021-03-10 22:11:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:16,954 INFO L225 Difference]: With dead ends: 1170 [2021-03-10 22:11:16,954 INFO L226 Difference]: Without dead ends: 1170 [2021-03-10 22:11:16,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-03-10 22:11:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 803. [2021-03-10 22:11:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.4364089775561095) internal successors, (2756), 802 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2756 transitions. [2021-03-10 22:11:16,964 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2756 transitions. Word has length 20 [2021-03-10 22:11:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:16,964 INFO L480 AbstractCegarLoop]: Abstraction has 803 states and 2756 transitions. [2021-03-10 22:11:16,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2756 transitions. [2021-03-10 22:11:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:16,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:16,965 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:17,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5760,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:17,165 INFO L428 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1442870248, now seen corresponding path program 533 times [2021-03-10 22:11:17,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:17,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523723470] [2021-03-10 22:11:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:17,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523723470] [2021-03-10 22:11:17,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57680973] [2021-03-10 22:11:17,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:17,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:17,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:17,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:17,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:17,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:17,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:17,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455011951] [2021-03-10 22:11:17,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:17,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:17,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:17,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:17,589 INFO L87 Difference]: Start difference. First operand 803 states and 2756 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:18,121 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 22:11:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:18,233 INFO L93 Difference]: Finished difference Result 1200 states and 3765 transitions. [2021-03-10 22:11:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:18,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:18,236 INFO L225 Difference]: With dead ends: 1200 [2021-03-10 22:11:18,236 INFO L226 Difference]: Without dead ends: 1200 [2021-03-10 22:11:18,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 621.4ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:18,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-03-10 22:11:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 802. [2021-03-10 22:11:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.4344569288389515) internal successors, (2751), 801 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2751 transitions. [2021-03-10 22:11:18,246 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2751 transitions. Word has length 20 [2021-03-10 22:11:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:18,246 INFO L480 AbstractCegarLoop]: Abstraction has 802 states and 2751 transitions. [2021-03-10 22:11:18,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2751 transitions. [2021-03-10 22:11:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:18,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:18,247 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:18,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5769 [2021-03-10 22:11:18,447 INFO L428 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:18,447 INFO L82 PathProgramCache]: Analyzing trace with hash -150527848, now seen corresponding path program 534 times [2021-03-10 22:11:18,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:18,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600410533] [2021-03-10 22:11:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:18,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600410533] [2021-03-10 22:11:18,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975187628] [2021-03-10 22:11:18,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:18,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:11:18,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:18,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:18,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:18,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:18,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131361633] [2021-03-10 22:11:18,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:18,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:18,843 INFO L87 Difference]: Start difference. First operand 802 states and 2751 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:19,491 INFO L93 Difference]: Finished difference Result 1163 states and 3683 transitions. [2021-03-10 22:11:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:19,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:19,493 INFO L225 Difference]: With dead ends: 1163 [2021-03-10 22:11:19,493 INFO L226 Difference]: Without dead ends: 1163 [2021-03-10 22:11:19,493 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 546.8ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-03-10 22:11:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 799. [2021-03-10 22:11:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.4285714285714284) internal successors, (2736), 798 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2736 transitions. [2021-03-10 22:11:19,503 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2736 transitions. Word has length 20 [2021-03-10 22:11:19,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:19,503 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 2736 transitions. [2021-03-10 22:11:19,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2736 transitions. [2021-03-10 22:11:19,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:19,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:19,504 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:19,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5779,563 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:19,719 INFO L428 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:19,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1422133720, now seen corresponding path program 535 times [2021-03-10 22:11:19,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:19,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893673404] [2021-03-10 22:11:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:19,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893673404] [2021-03-10 22:11:19,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532474674] [2021-03-10 22:11:19,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:19,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:19,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:20,065 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:11:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:20,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:20,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:20,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760722090] [2021-03-10 22:11:20,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:20,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:20,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:20,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:20,178 INFO L87 Difference]: Start difference. First operand 799 states and 2736 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:20,670 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 22:11:20,911 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 22:11:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:21,068 INFO L93 Difference]: Finished difference Result 1099 states and 3512 transitions. [2021-03-10 22:11:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:21,070 INFO L225 Difference]: With dead ends: 1099 [2021-03-10 22:11:21,070 INFO L226 Difference]: Without dead ends: 1093 [2021-03-10 22:11:21,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 868.7ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-03-10 22:11:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 809. [2021-03-10 22:11:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.4195544554455446) internal successors, (2763), 808 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2763 transitions. [2021-03-10 22:11:21,080 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2763 transitions. Word has length 20 [2021-03-10 22:11:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:21,080 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 2763 transitions. [2021-03-10 22:11:21,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2763 transitions. [2021-03-10 22:11:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:21,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:21,081 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:21,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5789 [2021-03-10 22:11:21,281 INFO L428 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:21,282 INFO L82 PathProgramCache]: Analyzing trace with hash 957409650, now seen corresponding path program 536 times [2021-03-10 22:11:21,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:21,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13649035] [2021-03-10 22:11:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:21,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13649035] [2021-03-10 22:11:21,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993808686] [2021-03-10 22:11:21,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:21,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:21,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:21,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:21,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:21,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:21,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:21,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251577908] [2021-03-10 22:11:21,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:21,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:21,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:21,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:21,670 INFO L87 Difference]: Start difference. First operand 809 states and 2763 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:22,172 INFO L93 Difference]: Finished difference Result 1175 states and 3713 transitions. [2021-03-10 22:11:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:22,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:22,174 INFO L225 Difference]: With dead ends: 1175 [2021-03-10 22:11:22,174 INFO L226 Difference]: Without dead ends: 1175 [2021-03-10 22:11:22,174 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-03-10 22:11:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 799. [2021-03-10 22:11:22,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.4285714285714284) internal successors, (2736), 798 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2736 transitions. [2021-03-10 22:11:22,184 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2736 transitions. Word has length 20 [2021-03-10 22:11:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:22,184 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 2736 transitions. [2021-03-10 22:11:22,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2736 transitions. [2021-03-10 22:11:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:22,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:22,185 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:22,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5800,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:22,385 INFO L428 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:22,386 INFO L82 PathProgramCache]: Analyzing trace with hash -926539372, now seen corresponding path program 537 times [2021-03-10 22:11:22,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:22,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243522166] [2021-03-10 22:11:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:22,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243522166] [2021-03-10 22:11:22,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372594053] [2021-03-10 22:11:22,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:22,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:11:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:22,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:22,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:22,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877617936] [2021-03-10 22:11:22,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:22,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:22,737 INFO L87 Difference]: Start difference. First operand 799 states and 2736 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:23,129 INFO L93 Difference]: Finished difference Result 1222 states and 3850 transitions. [2021-03-10 22:11:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:23,131 INFO L225 Difference]: With dead ends: 1222 [2021-03-10 22:11:23,131 INFO L226 Difference]: Without dead ends: 1222 [2021-03-10 22:11:23,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-03-10 22:11:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 802. [2021-03-10 22:11:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.4344569288389515) internal successors, (2751), 801 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2751 transitions. [2021-03-10 22:11:23,141 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2751 transitions. Word has length 20 [2021-03-10 22:11:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:23,141 INFO L480 AbstractCegarLoop]: Abstraction has 802 states and 2751 transitions. [2021-03-10 22:11:23,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2751 transitions. [2021-03-10 22:11:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:23,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:23,142 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:23,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:23,343 INFO L428 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:23,343 INFO L82 PathProgramCache]: Analyzing trace with hash 697798396, now seen corresponding path program 538 times [2021-03-10 22:11:23,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:23,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899165979] [2021-03-10 22:11:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:23,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899165979] [2021-03-10 22:11:23,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908393334] [2021-03-10 22:11:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:23,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:23,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:23,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:23,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:23,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:23,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780314820] [2021-03-10 22:11:23,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:23,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:23,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:23,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:23,742 INFO L87 Difference]: Start difference. First operand 802 states and 2751 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,070 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 22:11:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:24,292 INFO L93 Difference]: Finished difference Result 1219 states and 3835 transitions. [2021-03-10 22:11:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:24,295 INFO L225 Difference]: With dead ends: 1219 [2021-03-10 22:11:24,295 INFO L226 Difference]: Without dead ends: 1219 [2021-03-10 22:11:24,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 520.1ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-03-10 22:11:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 798. [2021-03-10 22:11:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.42534504391468) internal successors, (2730), 797 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2730 transitions. [2021-03-10 22:11:24,305 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2730 transitions. Word has length 20 [2021-03-10 22:11:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:24,305 INFO L480 AbstractCegarLoop]: Abstraction has 798 states and 2730 transitions. [2021-03-10 22:11:24,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2730 transitions. [2021-03-10 22:11:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:24,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:24,306 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:24,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5819,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:24,507 INFO L428 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:24,507 INFO L82 PathProgramCache]: Analyzing trace with hash 853975960, now seen corresponding path program 539 times [2021-03-10 22:11:24,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:24,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143243471] [2021-03-10 22:11:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:24,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143243471] [2021-03-10 22:11:24,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159470280] [2021-03-10 22:11:24,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:24,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:24,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:24,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:24,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:24,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695154546] [2021-03-10 22:11:24,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:24,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:24,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:24,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:24,866 INFO L87 Difference]: Start difference. First operand 798 states and 2730 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:25,523 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 22:11:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:25,637 INFO L93 Difference]: Finished difference Result 983 states and 3226 transitions. [2021-03-10 22:11:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:25,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:25,639 INFO L225 Difference]: With dead ends: 983 [2021-03-10 22:11:25,639 INFO L226 Difference]: Without dead ends: 971 [2021-03-10 22:11:25,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 728.8ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-03-10 22:11:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 800. [2021-03-10 22:11:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.425531914893617) internal successors, (2737), 799 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2737 transitions. [2021-03-10 22:11:25,648 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2737 transitions. Word has length 20 [2021-03-10 22:11:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:25,648 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 2737 transitions. [2021-03-10 22:11:25,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2737 transitions. [2021-03-10 22:11:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:25,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:25,649 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:25,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5828 [2021-03-10 22:11:25,849 INFO L428 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:25,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1605376398, now seen corresponding path program 540 times [2021-03-10 22:11:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:25,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537378424] [2021-03-10 22:11:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:25,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537378424] [2021-03-10 22:11:25,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146656296] [2021-03-10 22:11:25,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:26,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:11:26,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:26,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:26,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:26,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:26,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:26,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782258525] [2021-03-10 22:11:26,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:26,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:26,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:26,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:26,217 INFO L87 Difference]: Start difference. First operand 800 states and 2737 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:26,975 INFO L93 Difference]: Finished difference Result 1022 states and 3313 transitions. [2021-03-10 22:11:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:26,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:26,978 INFO L225 Difference]: With dead ends: 1022 [2021-03-10 22:11:26,978 INFO L226 Difference]: Without dead ends: 1016 [2021-03-10 22:11:26,978 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 627.8ms TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-03-10 22:11:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 810. [2021-03-10 22:11:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4165636588380717) internal successors, (2764), 809 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2764 transitions. [2021-03-10 22:11:26,987 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2764 transitions. Word has length 20 [2021-03-10 22:11:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:26,987 INFO L480 AbstractCegarLoop]: Abstraction has 810 states and 2764 transitions. [2021-03-10 22:11:26,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2764 transitions. [2021-03-10 22:11:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:26,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:26,988 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:27,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5834 [2021-03-10 22:11:27,188 INFO L428 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash -310047528, now seen corresponding path program 541 times [2021-03-10 22:11:27,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:27,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659184343] [2021-03-10 22:11:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659184343] [2021-03-10 22:11:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345082409] [2021-03-10 22:11:27,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:27,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:27,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:27,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:27,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:27,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598384682] [2021-03-10 22:11:27,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:27,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:27,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:27,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:27,551 INFO L87 Difference]: Start difference. First operand 810 states and 2764 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:28,303 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 22:11:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:28,384 INFO L93 Difference]: Finished difference Result 1098 states and 3514 transitions. [2021-03-10 22:11:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:28,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:28,387 INFO L225 Difference]: With dead ends: 1098 [2021-03-10 22:11:28,387 INFO L226 Difference]: Without dead ends: 1098 [2021-03-10 22:11:28,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 741.8ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-03-10 22:11:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 798. [2021-03-10 22:11:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.42534504391468) internal successors, (2730), 797 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2730 transitions. [2021-03-10 22:11:28,396 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2730 transitions. Word has length 20 [2021-03-10 22:11:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:28,396 INFO L480 AbstractCegarLoop]: Abstraction has 798 states and 2730 transitions. [2021-03-10 22:11:28,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2730 transitions. [2021-03-10 22:11:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:28,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:28,397 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:28,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5844,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:28,598 INFO L428 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:28,598 INFO L82 PathProgramCache]: Analyzing trace with hash 927084582, now seen corresponding path program 542 times [2021-03-10 22:11:28,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:28,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397291344] [2021-03-10 22:11:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:28,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397291344] [2021-03-10 22:11:28,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836271197] [2021-03-10 22:11:28,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:28,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:28,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:28,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:28,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:28,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:28,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:11:28,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125099784] [2021-03-10 22:11:28,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:11:28,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:28,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:11:28,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:11:28,947 INFO L87 Difference]: Start difference. First operand 798 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:29,425 INFO L93 Difference]: Finished difference Result 1035 states and 3372 transitions. [2021-03-10 22:11:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:29,427 INFO L225 Difference]: With dead ends: 1035 [2021-03-10 22:11:29,427 INFO L226 Difference]: Without dead ends: 1035 [2021-03-10 22:11:29,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-03-10 22:11:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 797. [2021-03-10 22:11:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4271356783919598) internal successors, (2728), 796 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2728 transitions. [2021-03-10 22:11:29,436 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2728 transitions. Word has length 20 [2021-03-10 22:11:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:29,436 INFO L480 AbstractCegarLoop]: Abstraction has 797 states and 2728 transitions. [2021-03-10 22:11:29,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2728 transitions. [2021-03-10 22:11:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:29,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:29,437 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:29,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5853 [2021-03-10 22:11:29,637 INFO L428 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1678485020, now seen corresponding path program 543 times [2021-03-10 22:11:29,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:29,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229915136] [2021-03-10 22:11:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:29,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229915136] [2021-03-10 22:11:29,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481920689] [2021-03-10 22:11:29,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:29,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:11:29,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:29,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:29,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:29,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:29,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:29,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932400349] [2021-03-10 22:11:29,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:29,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:29,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:29,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:29,951 INFO L87 Difference]: Start difference. First operand 797 states and 2728 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:30,381 INFO L93 Difference]: Finished difference Result 1065 states and 3447 transitions. [2021-03-10 22:11:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:30,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:30,383 INFO L225 Difference]: With dead ends: 1065 [2021-03-10 22:11:30,383 INFO L226 Difference]: Without dead ends: 1065 [2021-03-10 22:11:30,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 397.7ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-03-10 22:11:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 799. [2021-03-10 22:11:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.4298245614035086) internal successors, (2737), 798 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2737 transitions. [2021-03-10 22:11:30,393 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2737 transitions. Word has length 20 [2021-03-10 22:11:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:30,393 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 2737 transitions. [2021-03-10 22:11:30,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2737 transitions. [2021-03-10 22:11:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:30,394 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:30,394 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:30,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5859 [2021-03-10 22:11:30,594 INFO L428 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:30,594 INFO L82 PathProgramCache]: Analyzing trace with hash -992144508, now seen corresponding path program 544 times [2021-03-10 22:11:30,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:30,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637704653] [2021-03-10 22:11:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:30,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637704653] [2021-03-10 22:11:30,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365719106] [2021-03-10 22:11:30,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:30,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:30,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:30,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:30,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:30,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:30,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185855169] [2021-03-10 22:11:30,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:30,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:30,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:30,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:30,982 INFO L87 Difference]: Start difference. First operand 799 states and 2737 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:31,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:31,563 INFO L93 Difference]: Finished difference Result 1023 states and 3345 transitions. [2021-03-10 22:11:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:31,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:31,565 INFO L225 Difference]: With dead ends: 1023 [2021-03-10 22:11:31,565 INFO L226 Difference]: Without dead ends: 1023 [2021-03-10 22:11:31,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-03-10 22:11:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 789. [2021-03-10 22:11:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.4086294416243654) internal successors, (2686), 788 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2686 transitions. [2021-03-10 22:11:31,574 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2686 transitions. Word has length 20 [2021-03-10 22:11:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:31,575 INFO L480 AbstractCegarLoop]: Abstraction has 789 states and 2686 transitions. [2021-03-10 22:11:31,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2686 transitions. [2021-03-10 22:11:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:31,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:31,576 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:31,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5866,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:31,776 INFO L428 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:31,776 INFO L82 PathProgramCache]: Analyzing trace with hash 3702490, now seen corresponding path program 545 times [2021-03-10 22:11:31,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:31,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33171895] [2021-03-10 22:11:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:31,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33171895] [2021-03-10 22:11:31,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358569452] [2021-03-10 22:11:31,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:31,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:31,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:31,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:31,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:32,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:32,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:32,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959897928] [2021-03-10 22:11:32,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:32,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:32,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:32,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:32,066 INFO L87 Difference]: Start difference. First operand 789 states and 2686 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:32,518 INFO L93 Difference]: Finished difference Result 1155 states and 3681 transitions. [2021-03-10 22:11:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:32,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:32,521 INFO L225 Difference]: With dead ends: 1155 [2021-03-10 22:11:32,521 INFO L226 Difference]: Without dead ends: 1155 [2021-03-10 22:11:32,521 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-03-10 22:11:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 794. [2021-03-10 22:11:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 3.4148802017654476) internal successors, (2708), 793 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2708 transitions. [2021-03-10 22:11:32,531 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2708 transitions. Word has length 20 [2021-03-10 22:11:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:32,531 INFO L480 AbstractCegarLoop]: Abstraction has 794 states and 2708 transitions. [2021-03-10 22:11:32,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2708 transitions. [2021-03-10 22:11:32,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:32,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:32,532 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:32,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5873,574 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:32,732 INFO L428 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash 712060708, now seen corresponding path program 546 times [2021-03-10 22:11:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:32,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407722536] [2021-03-10 22:11:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:32,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407722536] [2021-03-10 22:11:32,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439185724] [2021-03-10 22:11:32,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:32,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:11:32,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:32,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:33,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:33,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:33,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391788759] [2021-03-10 22:11:33,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:33,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:33,051 INFO L87 Difference]: Start difference. First operand 794 states and 2708 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:33,721 INFO L93 Difference]: Finished difference Result 1295 states and 4032 transitions. [2021-03-10 22:11:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:33,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:33,724 INFO L225 Difference]: With dead ends: 1295 [2021-03-10 22:11:33,724 INFO L226 Difference]: Without dead ends: 1295 [2021-03-10 22:11:33,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:33,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-03-10 22:11:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 791. [2021-03-10 22:11:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4253164556962026) internal successors, (2706), 790 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2706 transitions. [2021-03-10 22:11:33,735 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2706 transitions. Word has length 20 [2021-03-10 22:11:33,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:33,735 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 2706 transitions. [2021-03-10 22:11:33,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2706 transitions. [2021-03-10 22:11:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:33,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:33,736 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:33,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5877,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:33,936 INFO L428 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1457937328, now seen corresponding path program 547 times [2021-03-10 22:11:33,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:33,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927223524] [2021-03-10 22:11:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927223524] [2021-03-10 22:11:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486627633] [2021-03-10 22:11:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:34,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:34,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:34,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:34,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300923609] [2021-03-10 22:11:34,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:34,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:34,267 INFO L87 Difference]: Start difference. First operand 791 states and 2706 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:34,959 INFO L93 Difference]: Finished difference Result 1103 states and 3514 transitions. [2021-03-10 22:11:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:34,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:34,961 INFO L225 Difference]: With dead ends: 1103 [2021-03-10 22:11:34,961 INFO L226 Difference]: Without dead ends: 1089 [2021-03-10 22:11:34,961 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:34,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-03-10 22:11:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 791. [2021-03-10 22:11:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4227848101265823) internal successors, (2704), 790 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2704 transitions. [2021-03-10 22:11:34,971 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2704 transitions. Word has length 20 [2021-03-10 22:11:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:34,971 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 2704 transitions. [2021-03-10 22:11:34,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2704 transitions. [2021-03-10 22:11:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:34,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:34,972 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:35,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5884,576 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:35,172 INFO L428 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1822279588, now seen corresponding path program 548 times [2021-03-10 22:11:35,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:35,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793150962] [2021-03-10 22:11:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:35,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793150962] [2021-03-10 22:11:35,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386904697] [2021-03-10 22:11:35,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:35,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:35,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:35,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:35,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:35,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:35,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067076319] [2021-03-10 22:11:35,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:35,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:35,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:35,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:35,485 INFO L87 Difference]: Start difference. First operand 791 states and 2704 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:36,095 INFO L93 Difference]: Finished difference Result 1285 states and 4013 transitions. [2021-03-10 22:11:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:36,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:36,098 INFO L225 Difference]: With dead ends: 1285 [2021-03-10 22:11:36,098 INFO L226 Difference]: Without dead ends: 1285 [2021-03-10 22:11:36,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-03-10 22:11:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 794. [2021-03-10 22:11:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 3.42875157629256) internal successors, (2719), 793 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2719 transitions. [2021-03-10 22:11:36,109 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2719 transitions. Word has length 20 [2021-03-10 22:11:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:36,109 INFO L480 AbstractCegarLoop]: Abstraction has 794 states and 2719 transitions. [2021-03-10 22:11:36,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2719 transitions. [2021-03-10 22:11:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:36,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:36,110 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:36,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5893 [2021-03-10 22:11:36,310 INFO L428 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:36,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:36,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1289921628, now seen corresponding path program 549 times [2021-03-10 22:11:36,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:36,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717193159] [2021-03-10 22:11:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:36,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717193159] [2021-03-10 22:11:36,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016828263] [2021-03-10 22:11:36,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:36,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:11:36,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:36,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:36,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:36,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:36,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504472901] [2021-03-10 22:11:36,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:36,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:36,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:36,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:36,632 INFO L87 Difference]: Start difference. First operand 794 states and 2719 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:37,086 INFO L93 Difference]: Finished difference Result 1297 states and 4042 transitions. [2021-03-10 22:11:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:37,088 INFO L225 Difference]: With dead ends: 1297 [2021-03-10 22:11:37,088 INFO L226 Difference]: Without dead ends: 1297 [2021-03-10 22:11:37,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-03-10 22:11:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 797. [2021-03-10 22:11:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4346733668341707) internal successors, (2734), 796 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2734 transitions. [2021-03-10 22:11:37,098 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2734 transitions. Word has length 20 [2021-03-10 22:11:37,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:37,098 INFO L480 AbstractCegarLoop]: Abstraction has 797 states and 2734 transitions. [2021-03-10 22:11:37,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:37,098 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2734 transitions. [2021-03-10 22:11:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:37,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:37,099 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:37,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5898,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:37,299 INFO L428 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:37,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:37,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1047908712, now seen corresponding path program 550 times [2021-03-10 22:11:37,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:37,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023193667] [2021-03-10 22:11:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:37,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023193667] [2021-03-10 22:11:37,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853110475] [2021-03-10 22:11:37,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:37,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:37,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:37,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:37,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:37,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:37,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:37,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567012367] [2021-03-10 22:11:37,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:37,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:37,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:37,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:37,615 INFO L87 Difference]: Start difference. First operand 797 states and 2734 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:38,125 INFO L93 Difference]: Finished difference Result 1264 states and 3965 transitions. [2021-03-10 22:11:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:38,127 INFO L225 Difference]: With dead ends: 1264 [2021-03-10 22:11:38,128 INFO L226 Difference]: Without dead ends: 1264 [2021-03-10 22:11:38,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 432.5ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-03-10 22:11:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 791. [2021-03-10 22:11:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4227848101265823) internal successors, (2704), 790 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2704 transitions. [2021-03-10 22:11:38,138 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2704 transitions. Word has length 20 [2021-03-10 22:11:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:38,138 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 2704 transitions. [2021-03-10 22:11:38,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2704 transitions. [2021-03-10 22:11:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:38,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:38,139 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:38,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5905 [2021-03-10 22:11:38,339 INFO L428 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:38,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:38,339 INFO L82 PathProgramCache]: Analyzing trace with hash 648667560, now seen corresponding path program 551 times [2021-03-10 22:11:38,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:38,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928708023] [2021-03-10 22:11:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:38,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928708023] [2021-03-10 22:11:38,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525184365] [2021-03-10 22:11:38,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:38,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:38,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:38,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:38,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:38,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:38,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446280902] [2021-03-10 22:11:38,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:38,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:38,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:38,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:38,704 INFO L87 Difference]: Start difference. First operand 791 states and 2704 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:39,143 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 22:11:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:39,637 INFO L93 Difference]: Finished difference Result 1297 states and 3964 transitions. [2021-03-10 22:11:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:11:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:39,640 INFO L225 Difference]: With dead ends: 1297 [2021-03-10 22:11:39,640 INFO L226 Difference]: Without dead ends: 1290 [2021-03-10 22:11:39,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 801.9ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:39,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-03-10 22:11:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 804. [2021-03-10 22:11:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.4171855541718554) internal successors, (2744), 803 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2744 transitions. [2021-03-10 22:11:39,651 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2744 transitions. Word has length 20 [2021-03-10 22:11:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:39,651 INFO L480 AbstractCegarLoop]: Abstraction has 804 states and 2744 transitions. [2021-03-10 22:11:39,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2744 transitions. [2021-03-10 22:11:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:39,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:39,652 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:39,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5912 [2021-03-10 22:11:39,853 INFO L428 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:39,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2143079798, now seen corresponding path program 552 times [2021-03-10 22:11:39,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:39,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677092215] [2021-03-10 22:11:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:39,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677092215] [2021-03-10 22:11:39,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373345322] [2021-03-10 22:11:39,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:40,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:11:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:40,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:40,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:40,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:40,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535625822] [2021-03-10 22:11:40,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:40,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:40,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:40,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:40,158 INFO L87 Difference]: Start difference. First operand 804 states and 2744 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:41,348 INFO L93 Difference]: Finished difference Result 1530 states and 4588 transitions. [2021-03-10 22:11:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:11:41,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:41,351 INFO L225 Difference]: With dead ends: 1530 [2021-03-10 22:11:41,351 INFO L226 Difference]: Without dead ends: 1530 [2021-03-10 22:11:41,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:11:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-03-10 22:11:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 805. [2021-03-10 22:11:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.4203980099502487) internal successors, (2750), 804 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2750 transitions. [2021-03-10 22:11:41,364 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2750 transitions. Word has length 20 [2021-03-10 22:11:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:41,364 INFO L480 AbstractCegarLoop]: Abstraction has 805 states and 2750 transitions. [2021-03-10 22:11:41,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2750 transitions. [2021-03-10 22:11:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:41,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:41,365 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:41,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5922,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:41,565 INFO L428 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:41,565 INFO L82 PathProgramCache]: Analyzing trace with hash 649172076, now seen corresponding path program 553 times [2021-03-10 22:11:41,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:41,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375182825] [2021-03-10 22:11:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:41,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375182825] [2021-03-10 22:11:41,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551004785] [2021-03-10 22:11:41,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:41,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:41,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:41,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:41,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214993233] [2021-03-10 22:11:41,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:41,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:41,882 INFO L87 Difference]: Start difference. First operand 805 states and 2750 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:42,376 INFO L93 Difference]: Finished difference Result 1278 states and 3995 transitions. [2021-03-10 22:11:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:42,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:42,378 INFO L225 Difference]: With dead ends: 1278 [2021-03-10 22:11:42,378 INFO L226 Difference]: Without dead ends: 1272 [2021-03-10 22:11:42,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-03-10 22:11:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 814. [2021-03-10 22:11:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4120541205412054) internal successors, (2774), 813 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2774 transitions. [2021-03-10 22:11:42,388 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2774 transitions. Word has length 20 [2021-03-10 22:11:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:42,388 INFO L480 AbstractCegarLoop]: Abstraction has 814 states and 2774 transitions. [2021-03-10 22:11:42,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2774 transitions. [2021-03-10 22:11:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:42,389 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:42,389 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:42,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5929 [2021-03-10 22:11:42,590 INFO L428 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash -791770758, now seen corresponding path program 554 times [2021-03-10 22:11:42,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:42,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138664322] [2021-03-10 22:11:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:42,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138664322] [2021-03-10 22:11:42,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570948606] [2021-03-10 22:11:42,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:42,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:42,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:42,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:42,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:42,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:42,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:42,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052633528] [2021-03-10 22:11:42,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:42,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:42,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:42,981 INFO L87 Difference]: Start difference. First operand 814 states and 2774 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:43,543 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 22:11:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:43,845 INFO L93 Difference]: Finished difference Result 1306 states and 4020 transitions. [2021-03-10 22:11:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:43,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:43,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:43,848 INFO L225 Difference]: With dead ends: 1306 [2021-03-10 22:11:43,848 INFO L226 Difference]: Without dead ends: 1306 [2021-03-10 22:11:43,848 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 771.0ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-03-10 22:11:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 811. [2021-03-10 22:11:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.414814814814815) internal successors, (2766), 810 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2766 transitions. [2021-03-10 22:11:43,859 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2766 transitions. Word has length 20 [2021-03-10 22:11:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:43,859 INFO L480 AbstractCegarLoop]: Abstraction has 811 states and 2766 transitions. [2021-03-10 22:11:43,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2766 transitions. [2021-03-10 22:11:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:43,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:43,860 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:44,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5936 [2021-03-10 22:11:44,060 INFO L428 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:44,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:44,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1400487060, now seen corresponding path program 555 times [2021-03-10 22:11:44,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:44,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933651995] [2021-03-10 22:11:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:44,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933651995] [2021-03-10 22:11:44,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600939401] [2021-03-10 22:11:44,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:44,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:11:44,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:44,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:44,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:44,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324180049] [2021-03-10 22:11:44,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:44,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:44,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:44,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:44,401 INFO L87 Difference]: Start difference. First operand 811 states and 2766 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:45,312 INFO L93 Difference]: Finished difference Result 1480 states and 4513 transitions. [2021-03-10 22:11:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:11:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:45,315 INFO L225 Difference]: With dead ends: 1480 [2021-03-10 22:11:45,315 INFO L226 Difference]: Without dead ends: 1480 [2021-03-10 22:11:45,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 787.7ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:11:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-03-10 22:11:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 814. [2021-03-10 22:11:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4206642066420665) internal successors, (2781), 813 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2781 transitions. [2021-03-10 22:11:45,325 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2781 transitions. Word has length 20 [2021-03-10 22:11:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:45,325 INFO L480 AbstractCegarLoop]: Abstraction has 814 states and 2781 transitions. [2021-03-10 22:11:45,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2781 transitions. [2021-03-10 22:11:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:45,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:45,326 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:45,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5949 [2021-03-10 22:11:45,527 INFO L428 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:45,527 INFO L82 PathProgramCache]: Analyzing trace with hash -108144660, now seen corresponding path program 556 times [2021-03-10 22:11:45,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997029845] [2021-03-10 22:11:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:45,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997029845] [2021-03-10 22:11:45,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124009515] [2021-03-10 22:11:45,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:45,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:45,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:45,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:45,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:45,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:45,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:45,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835561372] [2021-03-10 22:11:45,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:45,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:45,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:45,834 INFO L87 Difference]: Start difference. First operand 814 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:46,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:46,752 INFO L93 Difference]: Finished difference Result 1449 states and 4446 transitions. [2021-03-10 22:11:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:11:46,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:46,755 INFO L225 Difference]: With dead ends: 1449 [2021-03-10 22:11:46,755 INFO L226 Difference]: Without dead ends: 1449 [2021-03-10 22:11:46,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 731.2ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:11:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-03-10 22:11:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 811. [2021-03-10 22:11:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.414814814814815) internal successors, (2766), 810 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2766 transitions. [2021-03-10 22:11:46,767 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2766 transitions. Word has length 20 [2021-03-10 22:11:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:46,767 INFO L480 AbstractCegarLoop]: Abstraction has 811 states and 2766 transitions. [2021-03-10 22:11:46,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2766 transitions. [2021-03-10 22:11:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:46,768 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:46,768 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:46,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5957 [2021-03-10 22:11:46,969 INFO L428 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:46,969 INFO L82 PathProgramCache]: Analyzing trace with hash 999792838, now seen corresponding path program 557 times [2021-03-10 22:11:46,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:46,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178655532] [2021-03-10 22:11:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:47,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178655532] [2021-03-10 22:11:47,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320687052] [2021-03-10 22:11:47,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:47,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:47,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:47,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:47,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:47,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:47,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650776430] [2021-03-10 22:11:47,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:47,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:47,291 INFO L87 Difference]: Start difference. First operand 811 states and 2766 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:48,018 INFO L93 Difference]: Finished difference Result 1478 states and 4473 transitions. [2021-03-10 22:11:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:11:48,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:48,020 INFO L225 Difference]: With dead ends: 1478 [2021-03-10 22:11:48,020 INFO L226 Difference]: Without dead ends: 1478 [2021-03-10 22:11:48,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 614.8ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:11:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-03-10 22:11:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 813. [2021-03-10 22:11:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.417487684729064) internal successors, (2775), 812 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2775 transitions. [2021-03-10 22:11:48,031 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2775 transitions. Word has length 20 [2021-03-10 22:11:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:48,031 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 2775 transitions. [2021-03-10 22:11:48,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2775 transitions. [2021-03-10 22:11:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:48,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:48,032 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:48,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5964,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:48,233 INFO L428 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash -884156184, now seen corresponding path program 558 times [2021-03-10 22:11:48,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:48,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122144405] [2021-03-10 22:11:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:48,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122144405] [2021-03-10 22:11:48,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928092873] [2021-03-10 22:11:48,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:48,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:11:48,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:48,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:48,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:48,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:48,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:48,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273422279] [2021-03-10 22:11:48,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:48,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:48,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:48,588 INFO L87 Difference]: Start difference. First operand 813 states and 2775 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:48,841 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:11:49,123 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:11:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:49,253 INFO L93 Difference]: Finished difference Result 1226 states and 3838 transitions. [2021-03-10 22:11:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:49,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:49,255 INFO L225 Difference]: With dead ends: 1226 [2021-03-10 22:11:49,255 INFO L226 Difference]: Without dead ends: 1226 [2021-03-10 22:11:49,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 552.1ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-03-10 22:11:49,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 803. [2021-03-10 22:11:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.423940149625935) internal successors, (2746), 802 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2746 transitions. [2021-03-10 22:11:49,266 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2746 transitions. Word has length 20 [2021-03-10 22:11:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:49,266 INFO L480 AbstractCegarLoop]: Abstraction has 803 states and 2746 transitions. [2021-03-10 22:11:49,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:49,266 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2746 transitions. [2021-03-10 22:11:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:49,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:49,267 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:49,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5971 [2021-03-10 22:11:49,467 INFO L428 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash 740181584, now seen corresponding path program 559 times [2021-03-10 22:11:49,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:49,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647461891] [2021-03-10 22:11:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:49,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647461891] [2021-03-10 22:11:49,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440289354] [2021-03-10 22:11:49,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:49,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:49,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:49,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:49,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:49,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091569008] [2021-03-10 22:11:49,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:49,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:49,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:49,839 INFO L87 Difference]: Start difference. First operand 803 states and 2746 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:50,094 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:11:50,358 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 22:11:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:50,538 INFO L93 Difference]: Finished difference Result 1223 states and 3827 transitions. [2021-03-10 22:11:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:50,541 INFO L225 Difference]: With dead ends: 1223 [2021-03-10 22:11:50,541 INFO L226 Difference]: Without dead ends: 1223 [2021-03-10 22:11:50,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-03-10 22:11:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 799. [2021-03-10 22:11:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.4147869674185465) internal successors, (2725), 798 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2725 transitions. [2021-03-10 22:11:50,551 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2725 transitions. Word has length 20 [2021-03-10 22:11:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:50,551 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 2725 transitions. [2021-03-10 22:11:50,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2725 transitions. [2021-03-10 22:11:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:50,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:50,552 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:50,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5984,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:50,753 INFO L428 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:50,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1776251878, now seen corresponding path program 560 times [2021-03-10 22:11:50,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:50,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121922054] [2021-03-10 22:11:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:50,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121922054] [2021-03-10 22:11:50,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465167770] [2021-03-10 22:11:50,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:50,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:50,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:51,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:51,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:51,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27375196] [2021-03-10 22:11:51,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:51,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:51,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:51,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:51,045 INFO L87 Difference]: Start difference. First operand 799 states and 2725 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:51,519 INFO L93 Difference]: Finished difference Result 1095 states and 3495 transitions. [2021-03-10 22:11:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:51,522 INFO L225 Difference]: With dead ends: 1095 [2021-03-10 22:11:51,522 INFO L226 Difference]: Without dead ends: 1081 [2021-03-10 22:11:51,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-03-10 22:11:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 801. [2021-03-10 22:11:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.415) internal successors, (2732), 800 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2732 transitions. [2021-03-10 22:11:51,532 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2732 transitions. Word has length 20 [2021-03-10 22:11:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:51,532 INFO L480 AbstractCegarLoop]: Abstraction has 801 states and 2732 transitions. [2021-03-10 22:11:51,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2732 transitions. [2021-03-10 22:11:51,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:51,533 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:51,533 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:51,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5997,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:51,733 INFO L428 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:51,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2128171906, now seen corresponding path program 561 times [2021-03-10 22:11:51,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:51,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276621569] [2021-03-10 22:11:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:51,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276621569] [2021-03-10 22:11:51,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72926516] [2021-03-10 22:11:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:51,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:11:51,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:51,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:52,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:52,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:52,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610193994] [2021-03-10 22:11:52,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:52,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:52,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:52,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:52,061 INFO L87 Difference]: Start difference. First operand 801 states and 2732 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:52,768 INFO L93 Difference]: Finished difference Result 1138 states and 3592 transitions. [2021-03-10 22:11:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:11:52,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:52,771 INFO L225 Difference]: With dead ends: 1138 [2021-03-10 22:11:52,771 INFO L226 Difference]: Without dead ends: 1131 [2021-03-10 22:11:52,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:11:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-03-10 22:11:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 812. [2021-03-10 22:11:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.406905055487053) internal successors, (2763), 811 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2763 transitions. [2021-03-10 22:11:52,781 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2763 transitions. Word has length 20 [2021-03-10 22:11:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:52,781 INFO L480 AbstractCegarLoop]: Abstraction has 812 states and 2763 transitions. [2021-03-10 22:11:52,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2763 transitions. [2021-03-10 22:11:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:52,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:52,782 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:52,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6003 [2021-03-10 22:11:52,982 INFO L428 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1399949242, now seen corresponding path program 562 times [2021-03-10 22:11:52,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:52,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290114243] [2021-03-10 22:11:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:53,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290114243] [2021-03-10 22:11:53,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688484507] [2021-03-10 22:11:53,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:53,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:53,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:53,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:53,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:53,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982875445] [2021-03-10 22:11:53,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:53,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:53,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:53,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:53,314 INFO L87 Difference]: Start difference. First operand 812 states and 2763 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:53,899 INFO L93 Difference]: Finished difference Result 1158 states and 3654 transitions. [2021-03-10 22:11:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:53,901 INFO L225 Difference]: With dead ends: 1158 [2021-03-10 22:11:53,902 INFO L226 Difference]: Without dead ends: 1158 [2021-03-10 22:11:53,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-03-10 22:11:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 797. [2021-03-10 22:11:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4145728643216082) internal successors, (2718), 796 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2718 transitions. [2021-03-10 22:11:53,911 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2718 transitions. Word has length 20 [2021-03-10 22:11:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:53,911 INFO L480 AbstractCegarLoop]: Abstraction has 797 states and 2718 transitions. [2021-03-10 22:11:53,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2718 transitions. [2021-03-10 22:11:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:53,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:53,912 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:54,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6013 [2021-03-10 22:11:54,112 INFO L428 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash 549345880, now seen corresponding path program 563 times [2021-03-10 22:11:54,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:54,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894544171] [2021-03-10 22:11:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:54,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894544171] [2021-03-10 22:11:54,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258377299] [2021-03-10 22:11:54,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:54,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:54,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:54,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:54,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:54,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:54,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:54,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474472390] [2021-03-10 22:11:54,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:54,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:54,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:54,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:54,386 INFO L87 Difference]: Start difference. First operand 797 states and 2718 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:54,757 INFO L93 Difference]: Finished difference Result 1225 states and 3867 transitions. [2021-03-10 22:11:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:54,760 INFO L225 Difference]: With dead ends: 1225 [2021-03-10 22:11:54,760 INFO L226 Difference]: Without dead ends: 1225 [2021-03-10 22:11:54,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:11:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-03-10 22:11:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 795. [2021-03-10 22:11:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.41183879093199) internal successors, (2709), 794 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2709 transitions. [2021-03-10 22:11:54,770 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2709 transitions. Word has length 20 [2021-03-10 22:11:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:54,770 INFO L480 AbstractCegarLoop]: Abstraction has 795 states and 2709 transitions. [2021-03-10 22:11:54,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2709 transitions. [2021-03-10 22:11:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:54,771 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:54,771 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:54,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6024 [2021-03-10 22:11:54,972 INFO L428 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1732111960, now seen corresponding path program 564 times [2021-03-10 22:11:54,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:54,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426212797] [2021-03-10 22:11:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:55,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426212797] [2021-03-10 22:11:55,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726909571] [2021-03-10 22:11:55,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:55,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:11:55,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:55,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:55,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:55,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:55,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:55,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291781645] [2021-03-10 22:11:55,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:55,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:55,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:55,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:55,283 INFO L87 Difference]: Start difference. First operand 795 states and 2709 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:55,763 INFO L93 Difference]: Finished difference Result 1254 states and 3936 transitions. [2021-03-10 22:11:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:55,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:55,766 INFO L225 Difference]: With dead ends: 1254 [2021-03-10 22:11:55,766 INFO L226 Difference]: Without dead ends: 1254 [2021-03-10 22:11:55,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-03-10 22:11:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 788. [2021-03-10 22:11:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.4193138500635323) internal successors, (2691), 787 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2691 transitions. [2021-03-10 22:11:55,782 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2691 transitions. Word has length 20 [2021-03-10 22:11:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:55,782 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 2691 transitions. [2021-03-10 22:11:55,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2691 transitions. [2021-03-10 22:11:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:55,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:55,783 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:55,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6028,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:55,983 INFO L428 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:55,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:55,984 INFO L82 PathProgramCache]: Analyzing trace with hash -225024996, now seen corresponding path program 565 times [2021-03-10 22:11:55,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:55,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20097576] [2021-03-10 22:11:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:56,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20097576] [2021-03-10 22:11:56,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930949254] [2021-03-10 22:11:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:56,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:56,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:56,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:56,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:56,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818093206] [2021-03-10 22:11:56,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:56,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:56,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:56,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:56,289 INFO L87 Difference]: Start difference. First operand 788 states and 2691 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:56,677 INFO L93 Difference]: Finished difference Result 1211 states and 3833 transitions. [2021-03-10 22:11:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:56,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:56,679 INFO L225 Difference]: With dead ends: 1211 [2021-03-10 22:11:56,679 INFO L226 Difference]: Without dead ends: 1211 [2021-03-10 22:11:56,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:11:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-03-10 22:11:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 780. [2021-03-10 22:11:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.4043645699614893) internal successors, (2652), 779 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2652 transitions. [2021-03-10 22:11:56,689 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2652 transitions. Word has length 20 [2021-03-10 22:11:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:56,689 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2652 transitions. [2021-03-10 22:11:56,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2652 transitions. [2021-03-10 22:11:56,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:56,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:56,690 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:56,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6034 [2021-03-10 22:11:56,890 INFO L428 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:56,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:56,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1392510632, now seen corresponding path program 566 times [2021-03-10 22:11:56,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:56,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922842693] [2021-03-10 22:11:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:56,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922842693] [2021-03-10 22:11:56,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041703243] [2021-03-10 22:11:56,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:57,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:57,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:57,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:57,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:57,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:57,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:57,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:57,140 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:11:57,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:57,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:11:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:57,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:57,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:57,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2715304] [2021-03-10 22:11:57,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:57,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:57,204 INFO L87 Difference]: Start difference. First operand 780 states and 2652 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:57,593 INFO L93 Difference]: Finished difference Result 1291 states and 4037 transitions. [2021-03-10 22:11:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:57,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:57,596 INFO L225 Difference]: With dead ends: 1291 [2021-03-10 22:11:57,596 INFO L226 Difference]: Without dead ends: 1291 [2021-03-10 22:11:57,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:11:57,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-03-10 22:11:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 786. [2021-03-10 22:11:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.4127388535031846) internal successors, (2679), 785 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2679 transitions. [2021-03-10 22:11:57,607 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2679 transitions. Word has length 20 [2021-03-10 22:11:57,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:57,607 INFO L480 AbstractCegarLoop]: Abstraction has 786 states and 2679 transitions. [2021-03-10 22:11:57,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:57,607 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2679 transitions. [2021-03-10 22:11:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:57,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:57,608 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:57,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6040 [2021-03-10 22:11:57,808 INFO L428 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:57,809 INFO L82 PathProgramCache]: Analyzing trace with hash -564626324, now seen corresponding path program 567 times [2021-03-10 22:11:57,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:57,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972694652] [2021-03-10 22:11:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:57,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972694652] [2021-03-10 22:11:57,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524861785] [2021-03-10 22:11:57,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:57,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:11:57,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:57,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:57,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:58,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:58,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:58,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:58,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:58,086 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:11:58,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:58,087 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:11:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:58,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:58,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:11:58,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291673267] [2021-03-10 22:11:58,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:11:58,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:11:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:11:58,163 INFO L87 Difference]: Start difference. First operand 786 states and 2679 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:58,592 INFO L93 Difference]: Finished difference Result 1297 states and 4052 transitions. [2021-03-10 22:11:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:58,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:58,595 INFO L225 Difference]: With dead ends: 1297 [2021-03-10 22:11:58,595 INFO L226 Difference]: Without dead ends: 1297 [2021-03-10 22:11:58,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:11:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-03-10 22:11:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 783. [2021-03-10 22:11:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4066496163682864) internal successors, (2664), 782 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2664 transitions. [2021-03-10 22:11:58,606 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2664 transitions. Word has length 20 [2021-03-10 22:11:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:58,606 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 2664 transitions. [2021-03-10 22:11:58,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:58,606 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2664 transitions. [2021-03-10 22:11:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:58,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:58,607 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:58,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6047 [2021-03-10 22:11:58,807 INFO L428 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:58,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:58,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1048940410, now seen corresponding path program 568 times [2021-03-10 22:11:58,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:58,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488811435] [2021-03-10 22:11:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:58,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488811435] [2021-03-10 22:11:58,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298967428] [2021-03-10 22:11:58,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:59,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:59,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:59,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:59,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:59,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:59,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:59,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:59,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:59,120 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:11:59,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:59,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:11:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:59,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:59,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:11:59,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092805999] [2021-03-10 22:11:59,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:11:59,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:59,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:11:59,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:11:59,182 INFO L87 Difference]: Start difference. First operand 783 states and 2664 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:59,500 INFO L93 Difference]: Finished difference Result 1255 states and 3945 transitions. [2021-03-10 22:11:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:59,503 INFO L225 Difference]: With dead ends: 1255 [2021-03-10 22:11:59,503 INFO L226 Difference]: Without dead ends: 1255 [2021-03-10 22:11:59,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-03-10 22:11:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 777. [2021-03-10 22:11:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.402061855670103) internal successors, (2640), 776 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2640 transitions. [2021-03-10 22:11:59,513 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2640 transitions. Word has length 20 [2021-03-10 22:11:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:59,513 INFO L480 AbstractCegarLoop]: Abstraction has 777 states and 2640 transitions. [2021-03-10 22:11:59,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2640 transitions. [2021-03-10 22:11:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:59,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:59,514 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:59,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6055 [2021-03-10 22:11:59,715 INFO L428 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:59,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:59,715 INFO L82 PathProgramCache]: Analyzing trace with hash 21523618, now seen corresponding path program 569 times [2021-03-10 22:11:59,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:59,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127275517] [2021-03-10 22:11:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:59,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127275517] [2021-03-10 22:11:59,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258575568] [2021-03-10 22:11:59,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:59,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:59,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:11:59,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:59,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:11:59,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:59,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:59,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:00,002 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:12:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:00,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:00,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:00,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:00,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:12:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:00,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:00,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:00,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009668306] [2021-03-10 22:12:00,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:00,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:00,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:00,111 INFO L87 Difference]: Start difference. First operand 777 states and 2640 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:00,938 INFO L93 Difference]: Finished difference Result 1594 states and 4780 transitions. [2021-03-10 22:12:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:12:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:00,942 INFO L225 Difference]: With dead ends: 1594 [2021-03-10 22:12:00,942 INFO L226 Difference]: Without dead ends: 1594 [2021-03-10 22:12:00,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 703.8ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:12:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-03-10 22:12:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 785. [2021-03-10 22:12:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.4094387755102042) internal successors, (2673), 784 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2673 transitions. [2021-03-10 22:12:00,954 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2673 transitions. Word has length 20 [2021-03-10 22:12:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:00,954 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 2673 transitions. [2021-03-10 22:12:00,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2673 transitions. [2021-03-10 22:12:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:00,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:00,955 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:01,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6061,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:01,155 INFO L428 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:01,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1948592438, now seen corresponding path program 570 times [2021-03-10 22:12:01,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:01,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564571154] [2021-03-10 22:12:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:01,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564571154] [2021-03-10 22:12:01,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811588525] [2021-03-10 22:12:01,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:01,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:12:01,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:01,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:01,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:01,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:01,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:01,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,478 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-03-10 22:12:01,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:01,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,515 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:12:01,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:01,516 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-03-10 22:12:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:01,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:01,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:01,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113722743] [2021-03-10 22:12:01,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:01,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:01,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:01,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:01,610 INFO L87 Difference]: Start difference. First operand 785 states and 2673 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:02,337 INFO L93 Difference]: Finished difference Result 1344 states and 4151 transitions. [2021-03-10 22:12:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:02,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:02,339 INFO L225 Difference]: With dead ends: 1344 [2021-03-10 22:12:02,339 INFO L226 Difference]: Without dead ends: 1344 [2021-03-10 22:12:02,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 602.9ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-03-10 22:12:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 785. [2021-03-10 22:12:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.417091836734694) internal successors, (2679), 784 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2679 transitions. [2021-03-10 22:12:02,350 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2679 transitions. Word has length 20 [2021-03-10 22:12:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:02,350 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 2679 transitions. [2021-03-10 22:12:02,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2679 transitions. [2021-03-10 22:12:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:02,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:02,351 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:02,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6070,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:02,552 INFO L428 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:02,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1636941932, now seen corresponding path program 571 times [2021-03-10 22:12:02,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:02,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799660206] [2021-03-10 22:12:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:02,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799660206] [2021-03-10 22:12:02,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707547291] [2021-03-10 22:12:02,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:02,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:02,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:02,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:02,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,892 INFO L628 ElimStorePlain]: treesize reduction 44, result has 47.6 percent of original size [2021-03-10 22:12:02,892 INFO L518 ElimStorePlain]: Eliminatee v_prenex_47 vanished before elimination [2021-03-10 22:12:02,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:02,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:02,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,927 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:12:02,927 INFO L518 ElimStorePlain]: Eliminatee v_prenex_49 vanished before elimination [2021-03-10 22:12:02,927 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-03-10 22:12:02,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:02,928 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:108, output treesize:20 [2021-03-10 22:12:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:03,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:03,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:03,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137578839] [2021-03-10 22:12:03,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:03,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:03,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:03,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:03,026 INFO L87 Difference]: Start difference. First operand 785 states and 2679 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:03,580 INFO L93 Difference]: Finished difference Result 1328 states and 4090 transitions. [2021-03-10 22:12:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:03,583 INFO L225 Difference]: With dead ends: 1328 [2021-03-10 22:12:03,583 INFO L226 Difference]: Without dead ends: 1321 [2021-03-10 22:12:03,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:12:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-03-10 22:12:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 796. [2021-03-10 22:12:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.4062893081761008) internal successors, (2708), 795 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2708 transitions. [2021-03-10 22:12:03,594 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2708 transitions. Word has length 20 [2021-03-10 22:12:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:03,594 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 2708 transitions. [2021-03-10 22:12:03,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2708 transitions. [2021-03-10 22:12:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:03,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:03,595 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:03,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6081 [2021-03-10 22:12:03,795 INFO L428 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:03,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:03,796 INFO L82 PathProgramCache]: Analyzing trace with hash -290122540, now seen corresponding path program 572 times [2021-03-10 22:12:03,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:03,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161886994] [2021-03-10 22:12:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:03,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161886994] [2021-03-10 22:12:03,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347697170] [2021-03-10 22:12:03,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:03,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:03,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:04,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:04,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:04,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,133 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-03-10 22:12:04,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:04,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:04,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,170 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:12:04,170 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:12:04,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:04,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:91, output treesize:20 [2021-03-10 22:12:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:04,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:04,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:04,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901903973] [2021-03-10 22:12:04,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:04,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:04,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:04,269 INFO L87 Difference]: Start difference. First operand 796 states and 2708 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:05,255 INFO L93 Difference]: Finished difference Result 1502 states and 4497 transitions. [2021-03-10 22:12:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:12:05,257 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:05,258 INFO L225 Difference]: With dead ends: 1502 [2021-03-10 22:12:05,259 INFO L226 Difference]: Without dead ends: 1502 [2021-03-10 22:12:05,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 847.0ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:12:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-10 22:12:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 792. [2021-03-10 22:12:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4058154235145386) internal successors, (2694), 791 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2694 transitions. [2021-03-10 22:12:05,270 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2694 transitions. Word has length 20 [2021-03-10 22:12:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:05,271 INFO L480 AbstractCegarLoop]: Abstraction has 792 states and 2694 transitions. [2021-03-10 22:12:05,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2694 transitions. [2021-03-10 22:12:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:05,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:05,272 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:05,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6094,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:05,472 INFO L428 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash 772924056, now seen corresponding path program 573 times [2021-03-10 22:12:05,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:05,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183304173] [2021-03-10 22:12:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:05,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183304173] [2021-03-10 22:12:05,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496085506] [2021-03-10 22:12:05,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:05,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:12:05,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:05,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:05,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:05,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:05,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:05,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:05,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:05,764 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:12:05,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:05,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:05,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:05,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:05,784 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:12:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:05,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:05,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:05,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530759657] [2021-03-10 22:12:05,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:05,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:05,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:05,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:05,891 INFO L87 Difference]: Start difference. First operand 792 states and 2694 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:06,706 INFO L93 Difference]: Finished difference Result 1611 states and 4861 transitions. [2021-03-10 22:12:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:12:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:06,709 INFO L225 Difference]: With dead ends: 1611 [2021-03-10 22:12:06,709 INFO L226 Difference]: Without dead ends: 1611 [2021-03-10 22:12:06,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 692.6ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:12:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-03-10 22:12:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 795. [2021-03-10 22:12:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.41183879093199) internal successors, (2709), 794 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2709 transitions. [2021-03-10 22:12:06,722 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2709 transitions. Word has length 20 [2021-03-10 22:12:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:06,722 INFO L480 AbstractCegarLoop]: Abstraction has 795 states and 2709 transitions. [2021-03-10 22:12:06,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2709 transitions. [2021-03-10 22:12:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:06,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:06,723 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:06,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 602 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6103 [2021-03-10 22:12:06,923 INFO L428 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2065266456, now seen corresponding path program 574 times [2021-03-10 22:12:06,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:06,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406603794] [2021-03-10 22:12:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:07,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406603794] [2021-03-10 22:12:07,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859066188] [2021-03-10 22:12:07,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:07,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:07,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:07,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:07,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:07,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:07,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:07,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:07,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:07,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:07,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:07,232 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-03-10 22:12:07,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:07,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:07,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:07,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:07,251 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-03-10 22:12:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:07,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:07,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:07,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232749125] [2021-03-10 22:12:07,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:07,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:07,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:07,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:07,355 INFO L87 Difference]: Start difference. First operand 795 states and 2709 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:08,161 INFO L93 Difference]: Finished difference Result 1580 states and 4794 transitions. [2021-03-10 22:12:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:12:08,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:08,163 INFO L225 Difference]: With dead ends: 1580 [2021-03-10 22:12:08,163 INFO L226 Difference]: Without dead ends: 1580 [2021-03-10 22:12:08,163 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 703.3ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:12:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-03-10 22:12:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 792. [2021-03-10 22:12:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4058154235145386) internal successors, (2694), 791 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2694 transitions. [2021-03-10 22:12:08,174 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2694 transitions. Word has length 20 [2021-03-10 22:12:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:08,174 INFO L480 AbstractCegarLoop]: Abstraction has 792 states and 2694 transitions. [2021-03-10 22:12:08,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2694 transitions. [2021-03-10 22:12:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:08,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:08,175 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:08,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6113 [2021-03-10 22:12:08,376 INFO L428 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1121763342, now seen corresponding path program 575 times [2021-03-10 22:12:08,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:08,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975846998] [2021-03-10 22:12:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:08,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975846998] [2021-03-10 22:12:08,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834436567] [2021-03-10 22:12:08,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:08,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:12:08,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:08,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:08,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:08,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:08,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:08,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:08,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:08,693 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.5 percent of original size [2021-03-10 22:12:08,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:08,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:08,730 INFO L628 ElimStorePlain]: treesize reduction 10, result has 73.0 percent of original size [2021-03-10 22:12:08,731 INFO L518 ElimStorePlain]: Eliminatee v_prenex_55 vanished before elimination [2021-03-10 22:12:08,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:08,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:08,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:08,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:08,749 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-03-10 22:12:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:08,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:08,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:08,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046276717] [2021-03-10 22:12:08,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:08,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:08,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:08,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:08,844 INFO L87 Difference]: Start difference. First operand 792 states and 2694 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:10,421 INFO L93 Difference]: Finished difference Result 1886 states and 5467 transitions. [2021-03-10 22:12:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:12:10,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:10,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:10,423 INFO L225 Difference]: With dead ends: 1886 [2021-03-10 22:12:10,423 INFO L226 Difference]: Without dead ends: 1886 [2021-03-10 22:12:10,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1370.7ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:12:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-03-10 22:12:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 794. [2021-03-10 22:12:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 3.408575031525851) internal successors, (2703), 793 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2703 transitions. [2021-03-10 22:12:10,436 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2703 transitions. Word has length 20 [2021-03-10 22:12:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:10,436 INFO L480 AbstractCegarLoop]: Abstraction has 794 states and 2703 transitions. [2021-03-10 22:12:10,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2703 transitions. [2021-03-10 22:12:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:10,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:10,437 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:10,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6127,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:10,637 INFO L428 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:10,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:10,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1289254932, now seen corresponding path program 576 times [2021-03-10 22:12:10,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:10,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743261303] [2021-03-10 22:12:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:10,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743261303] [2021-03-10 22:12:10,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075031756] [2021-03-10 22:12:10,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:10,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:12:10,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:10,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:10,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:10,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:10,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:10,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:10,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:10,973 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-03-10 22:12:10,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:10,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,009 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:12:11,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:11,011 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-03-10 22:12:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:11,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:11,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:11,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027692696] [2021-03-10 22:12:11,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:11,109 INFO L87 Difference]: Start difference. First operand 794 states and 2703 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:11,906 INFO L93 Difference]: Finished difference Result 1415 states and 4329 transitions. [2021-03-10 22:12:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:11,909 INFO L225 Difference]: With dead ends: 1415 [2021-03-10 22:12:11,909 INFO L226 Difference]: Without dead ends: 1415 [2021-03-10 22:12:11,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-03-10 22:12:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 795. [2021-03-10 22:12:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.41183879093199) internal successors, (2709), 794 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2709 transitions. [2021-03-10 22:12:11,921 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2709 transitions. Word has length 20 [2021-03-10 22:12:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:11,921 INFO L480 AbstractCegarLoop]: Abstraction has 795 states and 2709 transitions. [2021-03-10 22:12:11,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2709 transitions. [2021-03-10 22:12:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:11,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:11,922 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:12,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6137,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:12,122 INFO L428 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:12,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1381374596, now seen corresponding path program 577 times [2021-03-10 22:12:12,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:12,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418412200] [2021-03-10 22:12:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:12,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418412200] [2021-03-10 22:12:12,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29735907] [2021-03-10 22:12:12,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:12,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:12,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:12,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:12,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:12,442 INFO L628 ElimStorePlain]: treesize reduction 22, result has 64.5 percent of original size [2021-03-10 22:12:12,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:12,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:12,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:12,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:12,476 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:12:12,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:12,477 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-03-10 22:12:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:12,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:12,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:12,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214077064] [2021-03-10 22:12:12,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:12,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:12,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:12,580 INFO L87 Difference]: Start difference. First operand 795 states and 2709 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:13,442 INFO L93 Difference]: Finished difference Result 1405 states and 4303 transitions. [2021-03-10 22:12:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:13,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:13,446 INFO L225 Difference]: With dead ends: 1405 [2021-03-10 22:12:13,446 INFO L226 Difference]: Without dead ends: 1405 [2021-03-10 22:12:13,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 703.8ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:13,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-03-10 22:12:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 793. [2021-03-10 22:12:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4053030303030303) internal successors, (2697), 792 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2697 transitions. [2021-03-10 22:12:13,457 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2697 transitions. Word has length 20 [2021-03-10 22:12:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:13,457 INFO L480 AbstractCegarLoop]: Abstraction has 793 states and 2697 transitions. [2021-03-10 22:12:13,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2697 transitions. [2021-03-10 22:12:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:13,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:13,458 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:13,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6147 [2021-03-10 22:12:13,659 INFO L428 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:13,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:13,659 INFO L82 PathProgramCache]: Analyzing trace with hash -475486698, now seen corresponding path program 578 times [2021-03-10 22:12:13,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:13,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239236569] [2021-03-10 22:12:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239236569] [2021-03-10 22:12:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114120003] [2021-03-10 22:12:13,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:13,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:13,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:13,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:13,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:13,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:13,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:13,981 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.6 percent of original size [2021-03-10 22:12:13,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:13,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:14,034 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-03-10 22:12:14,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:14,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:14,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:14,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:14,070 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:12:14,070 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:12:14,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:14,071 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:79, output treesize:20 [2021-03-10 22:12:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:14,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:14,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:12:14,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047793859] [2021-03-10 22:12:14,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:12:14,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:14,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:12:14,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:12:14,139 INFO L87 Difference]: Start difference. First operand 793 states and 2697 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:14,631 INFO L93 Difference]: Finished difference Result 1312 states and 4046 transitions. [2021-03-10 22:12:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:14,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:14,634 INFO L225 Difference]: With dead ends: 1312 [2021-03-10 22:12:14,634 INFO L226 Difference]: Without dead ends: 1305 [2021-03-10 22:12:14,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:12:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-03-10 22:12:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 801. [2021-03-10 22:12:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.40375) internal successors, (2723), 800 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2723 transitions. [2021-03-10 22:12:14,645 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2723 transitions. Word has length 20 [2021-03-10 22:12:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:14,645 INFO L480 AbstractCegarLoop]: Abstraction has 801 states and 2723 transitions. [2021-03-10 22:12:14,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2723 transitions. [2021-03-10 22:12:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:14,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:14,646 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:14,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6159,607 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:14,847 INFO L428 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1892416126, now seen corresponding path program 579 times [2021-03-10 22:12:14,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:14,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456920019] [2021-03-10 22:12:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:14,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456920019] [2021-03-10 22:12:14,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683914322] [2021-03-10 22:12:14,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:15,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:12:15,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:15,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:15,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:15,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,174 INFO L628 ElimStorePlain]: treesize reduction 62, result has 39.2 percent of original size [2021-03-10 22:12:15,174 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-03-10 22:12:15,174 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-03-10 22:12:15,174 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-03-10 22:12:15,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:15,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:15,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,211 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:12:15,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:15,212 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:108, output treesize:20 [2021-03-10 22:12:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:15,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:15,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:12:15,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440373369] [2021-03-10 22:12:15,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:12:15,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:15,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:12:15,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:12:15,279 INFO L87 Difference]: Start difference. First operand 801 states and 2723 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:16,020 INFO L93 Difference]: Finished difference Result 1405 states and 4273 transitions. [2021-03-10 22:12:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:12:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:16,022 INFO L225 Difference]: With dead ends: 1405 [2021-03-10 22:12:16,022 INFO L226 Difference]: Without dead ends: 1405 [2021-03-10 22:12:16,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-03-10 22:12:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 799. [2021-03-10 22:12:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.406015037593985) internal successors, (2718), 798 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2718 transitions. [2021-03-10 22:12:16,032 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2718 transitions. Word has length 20 [2021-03-10 22:12:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:16,032 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 2718 transitions. [2021-03-10 22:12:16,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2718 transitions. [2021-03-10 22:12:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:16,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:16,033 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:16,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6169 [2021-03-10 22:12:16,234 INFO L428 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:16,234 INFO L82 PathProgramCache]: Analyzing trace with hash -629723868, now seen corresponding path program 580 times [2021-03-10 22:12:16,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:16,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031868423] [2021-03-10 22:12:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:16,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031868423] [2021-03-10 22:12:16,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29308790] [2021-03-10 22:12:16,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:16,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:16,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:16,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:16,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:16,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:16,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,548 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.4 percent of original size [2021-03-10 22:12:16,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:16,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,601 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-03-10 22:12:16,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_67 vanished before elimination [2021-03-10 22:12:16,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:16,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:16,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,637 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:12:16,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:16,638 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:114, output treesize:20 [2021-03-10 22:12:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:16,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:16,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:12:16,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952247248] [2021-03-10 22:12:16,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:12:16,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:16,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:12:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:12:16,684 INFO L87 Difference]: Start difference. First operand 799 states and 2718 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:17,072 INFO L93 Difference]: Finished difference Result 1327 states and 4106 transitions. [2021-03-10 22:12:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:12:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:17,075 INFO L225 Difference]: With dead ends: 1327 [2021-03-10 22:12:17,075 INFO L226 Difference]: Without dead ends: 1327 [2021-03-10 22:12:17,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:12:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-03-10 22:12:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 797. [2021-03-10 22:12:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.408291457286432) internal successors, (2713), 796 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2713 transitions. [2021-03-10 22:12:17,086 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2713 transitions. Word has length 20 [2021-03-10 22:12:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:17,086 INFO L480 AbstractCegarLoop]: Abstraction has 797 states and 2713 transitions. [2021-03-10 22:12:17,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2713 transitions. [2021-03-10 22:12:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:17,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:17,087 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:17,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6182 [2021-03-10 22:12:17,287 INFO L428 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1761990300, now seen corresponding path program 581 times [2021-03-10 22:12:17,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:17,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699073614] [2021-03-10 22:12:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:17,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699073614] [2021-03-10 22:12:17,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829052500] [2021-03-10 22:12:17,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:17,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:17,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:17,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:12:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:17,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:17,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:17,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:17,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,587 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-03-10 22:12:17,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:17,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:17,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:17,606 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-03-10 22:12:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:17,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:17,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:12:17,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093581135] [2021-03-10 22:12:17,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:12:17,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:17,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:12:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:12:17,717 INFO L87 Difference]: Start difference. First operand 797 states and 2713 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-03-10 22:12:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:12:17,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6194,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:17,949 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:12:17,953 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 22:12:17,953 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:12:17 BasicIcfg [2021-03-10 22:12:17,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:12:17,953 INFO L168 Benchmark]: Toolchain (without parser) took 840520.37 ms. Allocated memory was 255.9 MB in the beginning and 511.7 MB in the end (delta: 255.9 MB). Free memory was 236.6 MB in the beginning and 479.4 MB in the end (delta: -242.8 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.0 GB. [2021-03-10 22:12:17,954 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:12:17,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.45 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:12:17,954 INFO L168 Benchmark]: Boogie Preprocessor took 20.32 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:12:17,954 INFO L168 Benchmark]: RCFGBuilder took 573.29 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 218.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:12:17,954 INFO L168 Benchmark]: TraceAbstraction took 839889.85 ms. Allocated memory was 255.9 MB in the beginning and 511.7 MB in the end (delta: 255.9 MB). Free memory was 218.4 MB in the beginning and 479.4 MB in the end (delta: -261.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:12:17,954 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.45 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.32 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 573.29 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 218.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 839889.85 ms. Allocated memory was 255.9 MB in the beginning and 511.7 MB in the end (delta: 255.9 MB). Free memory was 218.4 MB in the beginning and 479.4 MB in the end (delta: -261.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 114). Cancelled while BasicCegarLoop was constructing difference of abstraction (797states) and FLOYD_HOARE automaton (currently 3 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (13 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 839811.1ms, OverallIterations: 768, TraceHistogramMax: 2, EmptinessCheckTime: 613.9ms, AutomataDifference: 465151.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41245 SDtfs, 99652 SDslu, 224022 SDs, 0 SdLazy, 244709 SolverSat, 9992 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 89393.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25261 GetRequests, 10297 SyntacticMatches, 228 SemanticMatches, 14736 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52271 ImplicationChecksByTransitivity, 449674.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=917occurred in iteration=449, InterpolantAutomatonStates: 9291, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6735.0ms AutomataMinimizationTime, 767 MinimizatonAttempts, 251390 StatesRemovedByMinimization, 767 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2565.9ms SsaConstructionTime, 6518.6ms SatisfiabilityAnalysisTime, 202200.5ms InterpolantComputationTime, 26730 NumberOfCodeBlocks, 26730 NumberOfCodeBlocksAsserted, 1900 NumberOfCheckSat, 25353 ConstructedInterpolants, 0 QuantifiedInterpolants, 297409 SizeOfPredicates, 5996 NumberOfNonLiveVariables, 52530 ConjunctsInSsa, 13996 ConjunctsInUnsatCore, 1377 InterpolantComputations, 175 PerfectInterpolantSequences, 1376/4135 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown