/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/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 17:19:13,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 17:19:13,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 17:19:13,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 17:19:13,661 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 [2021-05-03 17:19:13,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 17:19:13,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 17:19:13,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 17:19:13,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 17:19:13,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 17:19:13,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 17:19:13,695 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 17:19:13,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 17:19:13,695 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 17:19:13,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 17:19:13,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 17:19:13,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 17:19:13,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 17:19:13,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 17:19:13,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 17:19:13,696 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 17:19:13,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 17:19:13,697 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 17:19:13,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 17:19:13,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 17:19:13,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 17:19:13,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 17:19:13,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 17:19:13,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 17:19:13,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 17:19:13,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 17:19:13,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 17:19:13,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 17:19:13,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 17:19:13,698 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 17:19:13,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 17:19:13,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 17:19:13,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 17:19:14,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 17:19:14,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 17:19:14,004 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 17:19:14,005 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 17:19:14,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-05-03 17:19:14,060 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-05-03 17:19:14,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 17:19:14,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 17:19:14,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 17:19:14,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 17:19:14,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 17:19:14,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/1) ... [2021-05-03 17:19:14,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/1) ... [2021-05-03 17:19:14,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 17:19:14,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 17:19:14,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 17:19:14,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 17:19:14,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/1) ... [2021-05-03 17:19:14,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/1) ... [2021-05-03 17:19:14,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/1) ... [2021-05-03 17:19:14,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/1) ... [2021-05-03 17:19:14,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/1) ... [2021-05-03 17:19:14,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/1) ... [2021-05-03 17:19:14,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/1) ... [2021-05-03 17:19:14,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 17:19:14,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 17:19:14,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 17:19:14,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 17:19:14,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (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 [2021-05-03 17:19:14,231 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 17:19:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 17:19:14,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 17:19:14,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 17:19:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 17:19:14,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 17:19:14,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 17:19:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 17:19:14,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 17:19:14,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 17:19:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 17:19:14,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 17:19:14,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 17:19:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 17:19:14,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 17:19:14,234 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 17:19:14,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 17:19:14,377 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 17:19:14,378 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 05:19:14 BoogieIcfgContainer [2021-05-03 17:19:14,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 17:19:14,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 17:19:14,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 17:19:14,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 17:19:14,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:14" (1/2) ... [2021-05-03 17:19:14,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1610dcb8 and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 05:19:14, skipping insertion in model container [2021-05-03 17:19:14,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 05:19:14" (2/2) ... [2021-05-03 17:19:14,384 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-05-03 17:19:14,388 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 17:19:14,388 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 17:19:14,390 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 17:19:14,391 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 17:19:14,466 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 17:19:14,504 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 17:19:14,533 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 17:19:14,533 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 17:19:14,533 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 17:19:14,533 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 17:19:14,534 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 17:19:14,534 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 17:19:14,534 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 17:19:14,534 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 17:19:14,540 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-05-03 17:19:14,595 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 17:19:14,613 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:14,614 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:14,614 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:14,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1363796692, now seen corresponding path program 1 times [2021-05-03 17:19:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:14,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752020989] [2021-05-03 17:19:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:14,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752020989] [2021-05-03 17:19:14,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:14,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 17:19:14,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837927397] [2021-05-03 17:19:14,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 17:19:14,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:14,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 17:19:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 17:19:14,816 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:14,875 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-05-03 17:19:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 17:19:14,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-03 17:19:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:14,894 INFO L225 Difference]: With dead ends: 854 [2021-05-03 17:19:14,894 INFO L226 Difference]: Without dead ends: 823 [2021-05-03 17:19:14,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 17:19:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-05-03 17:19:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-05-03 17:19:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-05-03 17:19:14,985 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-05-03 17:19:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:14,987 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-05-03 17:19:14,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-05-03 17:19:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 17:19:14,994 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:14,995 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:14,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 17:19:14,995 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:14,999 INFO L82 PathProgramCache]: Analyzing trace with hash -669454164, now seen corresponding path program 1 times [2021-05-03 17:19:14,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:14,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427918244] [2021-05-03 17:19:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:15,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427918244] [2021-05-03 17:19:15,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195954820] [2021-05-03 17:19:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 17:19:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 17:19:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:15,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:15,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-03 17:19:15,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88155505] [2021-05-03 17:19:15,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:15,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:15,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:15,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:15,253 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:15,371 INFO L93 Difference]: Finished difference Result 1573 states and 5792 transitions. [2021-05-03 17:19:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:19:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 17:19:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:15,380 INFO L225 Difference]: With dead ends: 1573 [2021-05-03 17:19:15,380 INFO L226 Difference]: Without dead ends: 1573 [2021-05-03 17:19:15,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:19:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-05-03 17:19:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-05-03 17:19:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-05-03 17:19:15,417 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-05-03 17:19:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:15,417 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-05-03 17:19:15,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-05-03 17:19:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 17:19:15,421 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:15,421 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:15,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 17:19:15,640 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash 421259310, now seen corresponding path program 1 times [2021-05-03 17:19:15,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:15,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431838802] [2021-05-03 17:19:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:15,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431838802] [2021-05-03 17:19:15,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188970584] [2021-05-03 17:19:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:15,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 17:19:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:15,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:15,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-03 17:19:15,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136529071] [2021-05-03 17:19:15,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:15,792 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:15,882 INFO L93 Difference]: Finished difference Result 1748 states and 6572 transitions. [2021-05-03 17:19:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:15,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 17:19:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:15,892 INFO L225 Difference]: With dead ends: 1748 [2021-05-03 17:19:15,892 INFO L226 Difference]: Without dead ends: 1748 [2021-05-03 17:19:15,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:19:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-05-03 17:19:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-05-03 17:19:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-05-03 17:19:15,925 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-05-03 17:19:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:15,925 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-05-03 17:19:15,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-05-03 17:19:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 17:19:15,928 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:15,928 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:16,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:16,131 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:16,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1822537518, now seen corresponding path program 1 times [2021-05-03 17:19:16,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:16,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359941899] [2021-05-03 17:19:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:16,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359941899] [2021-05-03 17:19:16,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:16,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:19:16,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223524911] [2021-05-03 17:19:16,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:19:16,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:16,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:19:16,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:19:16,177 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:16,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:16,245 INFO L93 Difference]: Finished difference Result 997 states and 3621 transitions. [2021-05-03 17:19:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 17:19:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 17:19:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:16,250 INFO L225 Difference]: With dead ends: 997 [2021-05-03 17:19:16,251 INFO L226 Difference]: Without dead ends: 884 [2021-05-03 17:19:16,252 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:19:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-05-03 17:19:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-05-03 17:19:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 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) [2021-05-03 17:19:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-05-03 17:19:16,279 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-05-03 17:19:16,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:16,280 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-05-03 17:19:16,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-05-03 17:19:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 17:19:16,283 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:16,283 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:16,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 17:19:16,283 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:16,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:16,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2021695698, now seen corresponding path program 2 times [2021-05-03 17:19:16,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:16,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053890920] [2021-05-03 17:19:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:16,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053890920] [2021-05-03 17:19:16,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:16,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:19:16,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539775264] [2021-05-03 17:19:16,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:19:16,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:16,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:19:16,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:19:16,341 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:16,389 INFO L93 Difference]: Finished difference Result 949 states and 3541 transitions. [2021-05-03 17:19:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 17:19:16,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 17:19:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:16,394 INFO L225 Difference]: With dead ends: 949 [2021-05-03 17:19:16,394 INFO L226 Difference]: Without dead ends: 949 [2021-05-03 17:19:16,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:19:16,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-05-03 17:19:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-05-03 17:19:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-05-03 17:19:16,416 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-05-03 17:19:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:16,416 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-05-03 17:19:16,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-05-03 17:19:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:16,420 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:16,421 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:16,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 17:19:16,421 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1964497838, now seen corresponding path program 1 times [2021-05-03 17:19:16,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:16,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212663577] [2021-05-03 17:19:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:16,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212663577] [2021-05-03 17:19:16,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605730809] [2021-05-03 17:19:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 17:19:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:16,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:19:16,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:16,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:16,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-03 17:19:16,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867562938] [2021-05-03 17:19:16,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 17:19:16,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 17:19:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:19:16,607 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-05-03 17:19:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:16,742 INFO L93 Difference]: Finished difference Result 1389 states and 5122 transitions. [2021-05-03 17:19:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 23 [2021-05-03 17:19:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:16,750 INFO L225 Difference]: With dead ends: 1389 [2021-05-03 17:19:16,750 INFO L226 Difference]: Without dead ends: 1389 [2021-05-03 17:19:16,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:19:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-05-03 17:19:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-05-03 17:19:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-05-03 17:19:16,784 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-05-03 17:19:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:16,784 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-05-03 17:19:16,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-05-03 17:19:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-05-03 17:19:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:16,787 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:16,787 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:17,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:17,001 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1231348690, now seen corresponding path program 1 times [2021-05-03 17:19:17,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:17,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801682105] [2021-05-03 17:19:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:17,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801682105] [2021-05-03 17:19:17,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750649676] [2021-05-03 17:19:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 17:19:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:17,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:17,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:17,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068293460] [2021-05-03 17:19:17,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:17,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:17,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:17,135 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:17,178 INFO L93 Difference]: Finished difference Result 1781 states and 6589 transitions. [2021-05-03 17:19:17,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:17,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:17,186 INFO L225 Difference]: With dead ends: 1781 [2021-05-03 17:19:17,186 INFO L226 Difference]: Without dead ends: 1738 [2021-05-03 17:19:17,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-05-03 17:19:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-05-03 17:19:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-05-03 17:19:17,214 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-05-03 17:19:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:17,214 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-05-03 17:19:17,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-05-03 17:19:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:17,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:17,217 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:17,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:17,433 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:17,433 INFO L82 PathProgramCache]: Analyzing trace with hash -516640296, now seen corresponding path program 2 times [2021-05-03 17:19:17,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:17,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396796027] [2021-05-03 17:19:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:17,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396796027] [2021-05-03 17:19:17,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818113422] [2021-05-03 17:19:17,495 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:19:17,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:19:17,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:17,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:17,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:17,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:17,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:17,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330133139] [2021-05-03 17:19:17,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:17,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:17,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:17,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:17,623 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:17,674 INFO L93 Difference]: Finished difference Result 1504 states and 5657 transitions. [2021-05-03 17:19:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:17,682 INFO L225 Difference]: With dead ends: 1504 [2021-05-03 17:19:17,683 INFO L226 Difference]: Without dead ends: 1461 [2021-05-03 17:19:17,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-05-03 17:19:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-05-03 17:19:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-05-03 17:19:17,713 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-05-03 17:19:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:17,713 INFO L480 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-05-03 17:19:17,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-05-03 17:19:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:17,717 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:17,717 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:17,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:17,933 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash -28423604, now seen corresponding path program 3 times [2021-05-03 17:19:17,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:17,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234969525] [2021-05-03 17:19:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:18,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234969525] [2021-05-03 17:19:18,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631874589] [2021-05-03 17:19:18,006 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:18,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:19:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:18,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:18,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:18,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664959391] [2021-05-03 17:19:18,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:18,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:18,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:18,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:18,120 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:18,170 INFO L93 Difference]: Finished difference Result 1444 states and 5469 transitions. [2021-05-03 17:19:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:18,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:18,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:18,177 INFO L225 Difference]: With dead ends: 1444 [2021-05-03 17:19:18,178 INFO L226 Difference]: Without dead ends: 1401 [2021-05-03 17:19:18,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-05-03 17:19:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-05-03 17:19:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-05-03 17:19:18,211 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-05-03 17:19:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:18,211 INFO L480 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-05-03 17:19:18,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-05-03 17:19:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:18,215 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:18,215 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:18,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:18,433 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:18,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:18,433 INFO L82 PathProgramCache]: Analyzing trace with hash -725562960, now seen corresponding path program 1 times [2021-05-03 17:19:18,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:18,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623524675] [2021-05-03 17:19:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:18,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623524675] [2021-05-03 17:19:18,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332311727] [2021-05-03 17:19:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:18,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:18,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104154546] [2021-05-03 17:19:18,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:18,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:18,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:18,685 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:18,759 INFO L93 Difference]: Finished difference Result 2517 states and 9613 transitions. [2021-05-03 17:19:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:18,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:18,780 INFO L225 Difference]: With dead ends: 2517 [2021-05-03 17:19:18,780 INFO L226 Difference]: Without dead ends: 2474 [2021-05-03 17:19:18,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-05-03 17:19:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-05-03 17:19:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-05-03 17:19:18,839 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-05-03 17:19:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:18,839 INFO L480 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-05-03 17:19:18,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:18,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-05-03 17:19:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:18,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:18,842 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:19,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 17:19:19,059 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2110243560, now seen corresponding path program 2 times [2021-05-03 17:19:19,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:19,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056236076] [2021-05-03 17:19:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:19,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056236076] [2021-05-03 17:19:19,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227889828] [2021-05-03 17:19:19,108 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 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 [2021-05-03 17:19:19,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:19:19,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:19,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:19,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:19,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:19,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:19,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141228739] [2021-05-03 17:19:19,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:19,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:19,203 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:19,281 INFO L93 Difference]: Finished difference Result 2128 states and 8197 transitions. [2021-05-03 17:19:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:19,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:19,290 INFO L225 Difference]: With dead ends: 2128 [2021-05-03 17:19:19,290 INFO L226 Difference]: Without dead ends: 2085 [2021-05-03 17:19:19,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:19,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-05-03 17:19:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-05-03 17:19:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-05-03 17:19:19,330 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-05-03 17:19:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:19,330 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-05-03 17:19:19,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-05-03 17:19:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:19,334 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:19,334 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:19,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 17:19:19,549 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:19,549 INFO L82 PathProgramCache]: Analyzing trace with hash 338647000, now seen corresponding path program 3 times [2021-05-03 17:19:19,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:19,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998623889] [2021-05-03 17:19:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:19,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998623889] [2021-05-03 17:19:19,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442160119] [2021-05-03 17:19:19,583 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 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 [2021-05-03 17:19:19,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:19:19,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:19,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:19,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:19,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302585352] [2021-05-03 17:19:19,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:19,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:19,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:19,677 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:19,773 INFO L93 Difference]: Finished difference Result 2247 states and 8749 transitions. [2021-05-03 17:19:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:19,781 INFO L225 Difference]: With dead ends: 2247 [2021-05-03 17:19:19,781 INFO L226 Difference]: Without dead ends: 2204 [2021-05-03 17:19:19,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-05-03 17:19:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-05-03 17:19:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-05-03 17:19:19,818 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-05-03 17:19:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:19,818 INFO L480 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-05-03 17:19:19,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-05-03 17:19:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:19,822 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:19,822 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:20,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:20,038 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:20,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1032459728, now seen corresponding path program 1 times [2021-05-03 17:19:20,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:20,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910216653] [2021-05-03 17:19:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:20,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910216653] [2021-05-03 17:19:20,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:20,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 17:19:20,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806166219] [2021-05-03 17:19:20,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 17:19:20,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:20,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 17:19:20,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 17:19:20,064 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-05-03 17:19:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:20,092 INFO L93 Difference]: Finished difference Result 1413 states and 5603 transitions. [2021-05-03 17:19:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 17:19:20,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 23 [2021-05-03 17:19:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:20,097 INFO L225 Difference]: With dead ends: 1413 [2021-05-03 17:19:20,097 INFO L226 Difference]: Without dead ends: 1413 [2021-05-03 17:19:20,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 17:19:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-05-03 17:19:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-05-03 17:19:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-05-03 17:19:20,129 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-05-03 17:19:20,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:20,129 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-05-03 17:19:20,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-05-03 17:19:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-05-03 17:19:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:20,134 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:20,134 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:20,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 17:19:20,134 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:20,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1753811376, now seen corresponding path program 4 times [2021-05-03 17:19:20,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:20,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862845323] [2021-05-03 17:19:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:20,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862845323] [2021-05-03 17:19:20,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379699864] [2021-05-03 17:19:20,163 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:20,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:19:20,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:20,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:20,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:20,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:20,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141605882] [2021-05-03 17:19:20,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:20,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:20,263 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:20,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:20,313 INFO L93 Difference]: Finished difference Result 2930 states and 11376 transitions. [2021-05-03 17:19:20,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:20,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:20,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:20,322 INFO L225 Difference]: With dead ends: 2930 [2021-05-03 17:19:20,322 INFO L226 Difference]: Without dead ends: 2887 [2021-05-03 17:19:20,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-05-03 17:19:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-05-03 17:19:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-05-03 17:19:20,375 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-05-03 17:19:20,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:20,375 INFO L480 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-05-03 17:19:20,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-05-03 17:19:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:20,378 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:20,379 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:20,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:20,593 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash -781102980, now seen corresponding path program 5 times [2021-05-03 17:19:20,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:20,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815429668] [2021-05-03 17:19:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:20,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815429668] [2021-05-03 17:19:20,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179907573] [2021-05-03 17:19:20,633 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 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 [2021-05-03 17:19:20,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:19:20,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:20,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:20,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:20,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:20,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748307304] [2021-05-03 17:19:20,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:20,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:20,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:20,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:20,735 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:20,789 INFO L93 Difference]: Finished difference Result 2434 states and 9626 transitions. [2021-05-03 17:19:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:20,797 INFO L225 Difference]: With dead ends: 2434 [2021-05-03 17:19:20,797 INFO L226 Difference]: Without dead ends: 2391 [2021-05-03 17:19:20,799 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-05-03 17:19:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-05-03 17:19:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-05-03 17:19:20,850 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-05-03 17:19:20,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:20,850 INFO L480 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-05-03 17:19:20,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-05-03 17:19:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:20,855 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:20,855 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:21,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 17:19:21,069 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1742267756, now seen corresponding path program 6 times [2021-05-03 17:19:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:21,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456294549] [2021-05-03 17:19:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:21,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456294549] [2021-05-03 17:19:21,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474293018] [2021-05-03 17:19:21,109 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 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 [2021-05-03 17:19:21,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 17:19:21,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:21,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:21,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:21,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 17:19:21,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606050863] [2021-05-03 17:19:21,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:19:21,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:19:21,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:21,213 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-05-03 17:19:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:21,322 INFO L93 Difference]: Finished difference Result 2600 states and 10380 transitions. [2021-05-03 17:19:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:21,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 23 [2021-05-03 17:19:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:21,330 INFO L225 Difference]: With dead ends: 2600 [2021-05-03 17:19:21,330 INFO L226 Difference]: Without dead ends: 2557 [2021-05-03 17:19:21,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:19:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-05-03 17:19:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-05-03 17:19:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-05-03 17:19:21,382 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-05-03 17:19:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:21,382 INFO L480 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-05-03 17:19:21,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-05-03 17:19:21,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-05-03 17:19:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:21,386 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:21,386 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:21,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 17:19:21,587 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash -413926864, now seen corresponding path program 2 times [2021-05-03 17:19:21,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:21,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256833918] [2021-05-03 17:19:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:21,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256833918] [2021-05-03 17:19:21,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:21,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:19:21,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443794731] [2021-05-03 17:19:21,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:19:21,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:19:21,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:19:21,611 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-05-03 17:19:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:21,657 INFO L93 Difference]: Finished difference Result 1899 states and 7725 transitions. [2021-05-03 17:19:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 17:19:21,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 23 [2021-05-03 17:19:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:21,663 INFO L225 Difference]: With dead ends: 1899 [2021-05-03 17:19:21,663 INFO L226 Difference]: Without dead ends: 1866 [2021-05-03 17:19:21,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:19:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-05-03 17:19:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-05-03 17:19:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-05-03 17:19:21,707 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-05-03 17:19:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:21,707 INFO L480 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-05-03 17:19:21,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-05-03 17:19:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-05-03 17:19:21,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:21,712 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:21,712 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:21,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-03 17:19:21,712 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:21,712 INFO L82 PathProgramCache]: Analyzing trace with hash 97493908, now seen corresponding path program 2 times [2021-05-03 17:19:21,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:21,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113894244] [2021-05-03 17:19:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:21,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113894244] [2021-05-03 17:19:21,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576041135] [2021-05-03 17:19:21,743 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:19:21,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:19:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:19:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:21,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:21,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-05-03 17:19:21,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891342150] [2021-05-03 17:19:21,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:19:21,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:21,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:19:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:21,863 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:22,002 INFO L93 Difference]: Finished difference Result 3584 states and 13842 transitions. [2021-05-03 17:19:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:22,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 17:19:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:22,013 INFO L225 Difference]: With dead ends: 3584 [2021-05-03 17:19:22,014 INFO L226 Difference]: Without dead ends: 3584 [2021-05-03 17:19:22,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:19:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-05-03 17:19:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-05-03 17:19:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-05-03 17:19:22,120 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-05-03 17:19:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:22,121 INFO L480 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-05-03 17:19:22,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-05-03 17:19:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:22,125 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:22,125 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:22,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 17:19:22,341 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1352231348, now seen corresponding path program 3 times [2021-05-03 17:19:22,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:22,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454116049] [2021-05-03 17:19:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:22,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454116049] [2021-05-03 17:19:22,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134383582] [2021-05-03 17:19:22,363 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:22,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:19:22,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:19:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:22,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:22,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-05-03 17:19:22,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266911045] [2021-05-03 17:19:22,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:19:22,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:22,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:19:22,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:22,456 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:22,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:22,716 INFO L93 Difference]: Finished difference Result 4126 states and 16268 transitions. [2021-05-03 17:19:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:19:22,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 17:19:22,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:22,726 INFO L225 Difference]: With dead ends: 4126 [2021-05-03 17:19:22,726 INFO L226 Difference]: Without dead ends: 4126 [2021-05-03 17:19:22,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:19:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-05-03 17:19:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-05-03 17:19:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-05-03 17:19:22,791 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-05-03 17:19:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:22,791 INFO L480 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-05-03 17:19:22,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-05-03 17:19:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:22,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:22,796 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:23,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:23,012 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:23,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:23,013 INFO L82 PathProgramCache]: Analyzing trace with hash -424342964, now seen corresponding path program 4 times [2021-05-03 17:19:23,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:23,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23434834] [2021-05-03 17:19:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:23,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23434834] [2021-05-03 17:19:23,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032440349] [2021-05-03 17:19:23,049 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 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 [2021-05-03 17:19:23,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:19:23,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:23,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:23,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:23,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:23,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:23,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885062609] [2021-05-03 17:19:23,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:23,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:23,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:23,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:23,127 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:23,181 INFO L93 Difference]: Finished difference Result 2707 states and 11337 transitions. [2021-05-03 17:19:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:23,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:23,188 INFO L225 Difference]: With dead ends: 2707 [2021-05-03 17:19:23,188 INFO L226 Difference]: Without dead ends: 2643 [2021-05-03 17:19:23,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-05-03 17:19:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-05-03 17:19:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-05-03 17:19:23,265 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-05-03 17:19:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:23,265 INFO L480 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-05-03 17:19:23,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-05-03 17:19:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:23,270 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:23,270 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:23,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:23,485 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:23,485 INFO L82 PathProgramCache]: Analyzing trace with hash 63873728, now seen corresponding path program 5 times [2021-05-03 17:19:23,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:23,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624374079] [2021-05-03 17:19:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:23,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624374079] [2021-05-03 17:19:23,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735768319] [2021-05-03 17:19:23,523 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 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 [2021-05-03 17:19:23,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:19:23,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:23,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:23,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:23,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:23,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:23,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473514688] [2021-05-03 17:19:23,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:23,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:23,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:23,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:23,596 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:23,666 INFO L93 Difference]: Finished difference Result 2722 states and 11385 transitions. [2021-05-03 17:19:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:23,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:23,673 INFO L225 Difference]: With dead ends: 2722 [2021-05-03 17:19:23,673 INFO L226 Difference]: Without dead ends: 2658 [2021-05-03 17:19:23,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-05-03 17:19:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-05-03 17:19:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-05-03 17:19:23,734 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-05-03 17:19:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:23,734 INFO L480 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-05-03 17:19:23,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-05-03 17:19:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:23,740 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:23,740 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:23,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:23,959 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:23,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1522443284, now seen corresponding path program 6 times [2021-05-03 17:19:23,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:23,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454518435] [2021-05-03 17:19:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:23,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454518435] [2021-05-03 17:19:23,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268164853] [2021-05-03 17:19:23,988 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 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 [2021-05-03 17:19:24,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:19:24,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:24,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:19:24,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:24,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:24,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 17:19:24,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402258849] [2021-05-03 17:19:24,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:19:24,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:19:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:24,044 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:24,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:24,140 INFO L93 Difference]: Finished difference Result 3086 states and 12754 transitions. [2021-05-03 17:19:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:19:24,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:19:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:24,147 INFO L225 Difference]: With dead ends: 3086 [2021-05-03 17:19:24,148 INFO L226 Difference]: Without dead ends: 3022 [2021-05-03 17:19:24,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:19:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-05-03 17:19:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-05-03 17:19:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-05-03 17:19:24,207 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-05-03 17:19:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:24,208 INFO L480 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-05-03 17:19:24,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:19:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-05-03 17:19:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:24,213 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:24,213 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:24,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 17:19:24,430 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:24,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1523854228, now seen corresponding path program 3 times [2021-05-03 17:19:24,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:24,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518705119] [2021-05-03 17:19:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:19:24,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518705119] [2021-05-03 17:19:24,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:24,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:19:24,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961091607] [2021-05-03 17:19:24,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:19:24,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:24,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:19:24,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:19:24,447 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-05-03 17:19:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:24,491 INFO L93 Difference]: Finished difference Result 2525 states and 10725 transitions. [2021-05-03 17:19:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 17:19:24,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 23 [2021-05-03 17:19:24,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:24,498 INFO L225 Difference]: With dead ends: 2525 [2021-05-03 17:19:24,498 INFO L226 Difference]: Without dead ends: 2525 [2021-05-03 17:19:24,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:19:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-05-03 17:19:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-05-03 17:19:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-05-03 17:19:24,549 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-05-03 17:19:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:24,549 INFO L480 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-05-03 17:19:24,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-05-03 17:19:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-05-03 17:19:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:24,554 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:24,554 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:24,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-03 17:19:24,555 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:24,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1093628820, now seen corresponding path program 4 times [2021-05-03 17:19:24,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:24,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389127924] [2021-05-03 17:19:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389127924] [2021-05-03 17:19:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988582779] [2021-05-03 17:19:24,581 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:19:24,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:19:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:19:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:24,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:24,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-03 17:19:24,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765051608] [2021-05-03 17:19:24,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 17:19:24,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 17:19:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:19:24,691 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:24,793 INFO L93 Difference]: Finished difference Result 3537 states and 14681 transitions. [2021-05-03 17:19:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 17:19:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:24,804 INFO L225 Difference]: With dead ends: 3537 [2021-05-03 17:19:24,804 INFO L226 Difference]: Without dead ends: 3537 [2021-05-03 17:19:24,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:19:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-05-03 17:19:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-05-03 17:19:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-05-03 17:19:24,882 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-05-03 17:19:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:24,882 INFO L480 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-05-03 17:19:24,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-05-03 17:19:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:24,889 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:24,889 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:25,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 17:19:25,105 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1241815956, now seen corresponding path program 5 times [2021-05-03 17:19:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:25,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473901589] [2021-05-03 17:19:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:25,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473901589] [2021-05-03 17:19:25,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271837745] [2021-05-03 17:19:25,136 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 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 [2021-05-03 17:19:25,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:19:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:25,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:19:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:25,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:25,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-05-03 17:19:25,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848035923] [2021-05-03 17:19:25,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:19:25,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:25,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:19:25,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:25,226 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-05-03 17:19:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:25,401 INFO L93 Difference]: Finished difference Result 5435 states and 21973 transitions. [2021-05-03 17:19:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:25,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 23 [2021-05-03 17:19:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:25,447 INFO L225 Difference]: With dead ends: 5435 [2021-05-03 17:19:25,447 INFO L226 Difference]: Without dead ends: 5435 [2021-05-03 17:19:25,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:19:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-05-03 17:19:25,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-05-03 17:19:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-05-03 17:19:25,650 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-05-03 17:19:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:25,650 INFO L480 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-05-03 17:19:25,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-05-03 17:19:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-05-03 17:19:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:19:25,659 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:25,659 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:25,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 17:19:25,893 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1311709520, now seen corresponding path program 6 times [2021-05-03 17:19:25,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:25,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074359188] [2021-05-03 17:19:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:25,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074359188] [2021-05-03 17:19:25,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441584823] [2021-05-03 17:19:25,920 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 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 [2021-05-03 17:19:25,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 17:19:25,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:19:25,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:26,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:26,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-05-03 17:19:26,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128712005] [2021-05-03 17:19:26,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:19:26,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:19:26,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:26,002 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-05-03 17:19:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:26,229 INFO L93 Difference]: Finished difference Result 6635 states and 27289 transitions. [2021-05-03 17:19:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:19:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 23 [2021-05-03 17:19:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:26,246 INFO L225 Difference]: With dead ends: 6635 [2021-05-03 17:19:26,246 INFO L226 Difference]: Without dead ends: 6635 [2021-05-03 17:19:26,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:19:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-05-03 17:19:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-05-03 17:19:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-05-03 17:19:26,391 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-05-03 17:19:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:26,392 INFO L480 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-05-03 17:19:26,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-05-03 17:19:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-05-03 17:19:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:26,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:26,401 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:26,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 17:19:26,617 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1126765012, now seen corresponding path program 7 times [2021-05-03 17:19:26,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:26,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063969213] [2021-05-03 17:19:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:26,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063969213] [2021-05-03 17:19:26,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614055320] [2021-05-03 17:19:26,643 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 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 [2021-05-03 17:19:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:26,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:19:26,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:26,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:26,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-03 17:19:26,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548500625] [2021-05-03 17:19:26,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:19:26,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:26,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:19:26,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:19:26,717 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-05-03 17:19:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:26,887 INFO L93 Difference]: Finished difference Result 8080 states and 33388 transitions. [2021-05-03 17:19:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:19:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 25 [2021-05-03 17:19:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:26,909 INFO L225 Difference]: With dead ends: 8080 [2021-05-03 17:19:26,909 INFO L226 Difference]: Without dead ends: 7806 [2021-05-03 17:19:26,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:19:26,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-05-03 17:19:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-05-03 17:19:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-05-03 17:19:27,059 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-05-03 17:19:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:27,059 INFO L480 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-05-03 17:19:27,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-05-03 17:19:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-05-03 17:19:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:27,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:27,072 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:27,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 17:19:27,285 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:27,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:27,285 INFO L82 PathProgramCache]: Analyzing trace with hash -838332880, now seen corresponding path program 4 times [2021-05-03 17:19:27,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:27,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377819987] [2021-05-03 17:19:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:27,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377819987] [2021-05-03 17:19:27,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656776351] [2021-05-03 17:19:27,375 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 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 [2021-05-03 17:19:27,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:19:27,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:27,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:19:27,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:27,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:27,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:19:27,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626932679] [2021-05-03 17:19:27,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:19:27,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:19:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:27,479 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:19:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:27,695 INFO L93 Difference]: Finished difference Result 7686 states and 32613 transitions. [2021-05-03 17:19:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:19:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:19:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:27,712 INFO L225 Difference]: With dead ends: 7686 [2021-05-03 17:19:27,712 INFO L226 Difference]: Without dead ends: 7610 [2021-05-03 17:19:27,712 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:27,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-05-03 17:19:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-05-03 17:19:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-05-03 17:19:27,836 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-05-03 17:19:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:27,836 INFO L480 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-05-03 17:19:27,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:19:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-05-03 17:19:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:27,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:27,850 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:28,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:28,050 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:28,051 INFO L82 PathProgramCache]: Analyzing trace with hash 260787888, now seen corresponding path program 1 times [2021-05-03 17:19:28,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:28,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469551324] [2021-05-03 17:19:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:28,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469551324] [2021-05-03 17:19:28,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163468894] [2021-05-03 17:19:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:28,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:19:28,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:28,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:28,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 17:19:28,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200261542] [2021-05-03 17:19:28,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:19:28,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:28,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:19:28,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:19:28,228 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-05-03 17:19:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:28,609 INFO L93 Difference]: Finished difference Result 13992 states and 58011 transitions. [2021-05-03 17:19:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:19:28,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-05-03 17:19:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:28,654 INFO L225 Difference]: With dead ends: 13992 [2021-05-03 17:19:28,654 INFO L226 Difference]: Without dead ends: 13926 [2021-05-03 17:19:28,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:19:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-05-03 17:19:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-05-03 17:19:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-05-03 17:19:28,925 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-05-03 17:19:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:28,925 INFO L480 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-05-03 17:19:28,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-05-03 17:19:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-05-03 17:19:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:28,941 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:28,941 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:29,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 17:19:29,142 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:29,142 INFO L82 PathProgramCache]: Analyzing trace with hash 330681452, now seen corresponding path program 2 times [2021-05-03 17:19:29,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:29,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026826366] [2021-05-03 17:19:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:29,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026826366] [2021-05-03 17:19:29,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873033902] [2021-05-03 17:19:29,195 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 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 [2021-05-03 17:19:29,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:19:29,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:29,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:19:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:29,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:29,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 17:19:29,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905149260] [2021-05-03 17:19:29,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:19:29,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:29,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:19:29,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:19:29,319 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-05-03 17:19:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:29,779 INFO L93 Difference]: Finished difference Result 12594 states and 53597 transitions. [2021-05-03 17:19:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:19:29,779 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-05-03 17:19:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:29,814 INFO L225 Difference]: With dead ends: 12594 [2021-05-03 17:19:29,815 INFO L226 Difference]: Without dead ends: 12594 [2021-05-03 17:19:29,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:19:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-05-03 17:19:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-05-03 17:19:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-05-03 17:19:30,115 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-05-03 17:19:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:30,115 INFO L480 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-05-03 17:19:30,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-05-03 17:19:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-05-03 17:19:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:30,135 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:30,136 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:30,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:30,349 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash -7958540, now seen corresponding path program 3 times [2021-05-03 17:19:30,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:30,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895913081] [2021-05-03 17:19:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:30,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895913081] [2021-05-03 17:19:30,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045312383] [2021-05-03 17:19:30,394 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 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 [2021-05-03 17:19:30,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:19:30,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:30,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:19:30,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:30,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:30,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 17:19:30,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904739920] [2021-05-03 17:19:30,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:19:30,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:30,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:19:30,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:30,527 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:31,236 INFO L93 Difference]: Finished difference Result 29971 states and 129329 transitions. [2021-05-03 17:19:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 17:19:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:19:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:31,357 INFO L225 Difference]: With dead ends: 29971 [2021-05-03 17:19:31,357 INFO L226 Difference]: Without dead ends: 29848 [2021-05-03 17:19:31,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:19:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-05-03 17:19:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-05-03 17:19:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-05-03 17:19:31,995 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-05-03 17:19:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:31,996 INFO L480 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-05-03 17:19:31,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-05-03 17:19:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:32,031 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:32,031 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:32,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-03 17:19:32,247 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:32,248 INFO L82 PathProgramCache]: Analyzing trace with hash 209069450, now seen corresponding path program 4 times [2021-05-03 17:19:32,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:32,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640589329] [2021-05-03 17:19:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:32,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640589329] [2021-05-03 17:19:32,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796381665] [2021-05-03 17:19:32,344 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 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 [2021-05-03 17:19:32,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:19:32,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:32,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:19:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:32,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:32,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-05-03 17:19:32,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681803776] [2021-05-03 17:19:32,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:19:32,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:32,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:19:32,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:19:32,460 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:33,127 INFO L93 Difference]: Finished difference Result 31001 states and 134975 transitions. [2021-05-03 17:19:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 17:19:33,128 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:19:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:33,256 INFO L225 Difference]: With dead ends: 31001 [2021-05-03 17:19:33,257 INFO L226 Difference]: Without dead ends: 30851 [2021-05-03 17:19:33,258 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:19:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-05-03 17:19:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-05-03 17:19:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-05-03 17:19:34,113 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-05-03 17:19:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:34,113 INFO L480 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-05-03 17:19:34,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:34,113 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-05-03 17:19:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:34,167 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:34,167 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:34,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:34,368 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:34,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:34,368 INFO L82 PathProgramCache]: Analyzing trace with hash -856581012, now seen corresponding path program 5 times [2021-05-03 17:19:34,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:34,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700908928] [2021-05-03 17:19:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700908928] [2021-05-03 17:19:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719873295] [2021-05-03 17:19:34,505 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 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 [2021-05-03 17:19:34,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:19:34,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:19:34,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:34,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:34,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:19:34,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070853088] [2021-05-03 17:19:34,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:19:34,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:34,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:19:34,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:19:34,688 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:34,853 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2021-05-03 17:19:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:35,334 INFO L93 Difference]: Finished difference Result 27651 states and 123756 transitions. [2021-05-03 17:19:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:19:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:19:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:35,523 INFO L225 Difference]: With dead ends: 27651 [2021-05-03 17:19:35,523 INFO L226 Difference]: Without dead ends: 27523 [2021-05-03 17:19:35,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:19:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-05-03 17:19:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-05-03 17:19:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-05-03 17:19:36,228 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-05-03 17:19:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:36,228 INFO L480 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-05-03 17:19:36,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-05-03 17:19:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:36,284 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:36,284 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:36,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 17:19:36,497 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1236735550, now seen corresponding path program 6 times [2021-05-03 17:19:36,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:36,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684268222] [2021-05-03 17:19:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:36,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684268222] [2021-05-03 17:19:36,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781808777] [2021-05-03 17:19:36,562 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 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 [2021-05-03 17:19:36,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:19:36,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:36,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:19:36,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:36,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:36,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:19:36,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826897687] [2021-05-03 17:19:36,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:19:36,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:19:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:19:36,671 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:37,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:37,081 INFO L93 Difference]: Finished difference Result 22500 states and 101338 transitions. [2021-05-03 17:19:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:19:37,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:19:37,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:37,150 INFO L225 Difference]: With dead ends: 22500 [2021-05-03 17:19:37,150 INFO L226 Difference]: Without dead ends: 22316 [2021-05-03 17:19:37,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:19:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-05-03 17:19:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-05-03 17:19:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-05-03 17:19:37,791 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-05-03 17:19:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:37,792 INFO L480 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-05-03 17:19:37,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-05-03 17:19:37,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:37,852 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:37,853 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:38,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 17:19:38,058 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:38,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:38,058 INFO L82 PathProgramCache]: Analyzing trace with hash -556155216, now seen corresponding path program 7 times [2021-05-03 17:19:38,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:38,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028501520] [2021-05-03 17:19:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:38,250 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-03 17:19:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:38,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028501520] [2021-05-03 17:19:38,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133904539] [2021-05-03 17:19:38,257 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:19:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:38,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:19:38,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:38,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:38,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 17:19:38,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887641256] [2021-05-03 17:19:38,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:19:38,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:38,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:19:38,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:38,399 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:39,471 INFO L93 Difference]: Finished difference Result 72723 states and 315638 transitions. [2021-05-03 17:19:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 17:19:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:19:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:39,825 INFO L225 Difference]: With dead ends: 72723 [2021-05-03 17:19:39,825 INFO L226 Difference]: Without dead ends: 72477 [2021-05-03 17:19:39,825 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:19:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72477 states. [2021-05-03 17:19:41,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72477 to 44928. [2021-05-03 17:19:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44928 states, 44927 states have (on average 4.539052240300933) internal successors, (203926), 44927 states have internal predecessors, (203926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44928 states to 44928 states and 203926 transitions. [2021-05-03 17:19:41,939 INFO L78 Accepts]: Start accepts. Automaton has 44928 states and 203926 transitions. Word has length 25 [2021-05-03 17:19:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:41,939 INFO L480 AbstractCegarLoop]: Abstraction has 44928 states and 203926 transitions. [2021-05-03 17:19:41,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 44928 states and 203926 transitions. [2021-05-03 17:19:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:42,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:42,054 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:42,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 17:19:42,255 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1592641320, now seen corresponding path program 8 times [2021-05-03 17:19:42,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:42,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233018542] [2021-05-03 17:19:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:42,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233018542] [2021-05-03 17:19:42,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203507600] [2021-05-03 17:19:42,319 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 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 [2021-05-03 17:19:42,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:19:42,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:19:42,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:42,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:42,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:19:42,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028695799] [2021-05-03 17:19:42,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:19:42,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:42,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:19:42,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:19:42,678 INFO L87 Difference]: Start difference. First operand 44928 states and 203926 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:43,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:43,178 INFO L93 Difference]: Finished difference Result 45875 states and 207187 transitions. [2021-05-03 17:19:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:19:43,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:19:43,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:43,366 INFO L225 Difference]: With dead ends: 45875 [2021-05-03 17:19:43,366 INFO L226 Difference]: Without dead ends: 45705 [2021-05-03 17:19:43,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:19:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45705 states. [2021-05-03 17:19:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45705 to 44959. [2021-05-03 17:19:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44959 states, 44958 states have (on average 4.537568397170693) internal successors, (204000), 44958 states have internal predecessors, (204000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44959 states to 44959 states and 204000 transitions. [2021-05-03 17:19:44,874 INFO L78 Accepts]: Start accepts. Automaton has 44959 states and 204000 transitions. Word has length 25 [2021-05-03 17:19:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:44,875 INFO L480 AbstractCegarLoop]: Abstraction has 44959 states and 204000 transitions. [2021-05-03 17:19:44,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 44959 states and 204000 transitions. [2021-05-03 17:19:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:44,985 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:44,985 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:45,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:45,186 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:45,186 INFO L82 PathProgramCache]: Analyzing trace with hash 256048560, now seen corresponding path program 1 times [2021-05-03 17:19:45,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:45,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549437933] [2021-05-03 17:19:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:45,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549437933] [2021-05-03 17:19:45,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949574764] [2021-05-03 17:19:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 17:19:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:45,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:19:45,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:45,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:45,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-03 17:19:45,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108177596] [2021-05-03 17:19:45,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:19:45,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:45,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:19:45,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:19:45,317 INFO L87 Difference]: Start difference. First operand 44959 states and 204000 transitions. Second operand has 10 states, 10 states have (on average 3.7) 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) [2021-05-03 17:19:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:46,096 INFO L93 Difference]: Finished difference Result 49005 states and 219986 transitions. [2021-05-03 17:19:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:19:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) 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 25 [2021-05-03 17:19:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:46,302 INFO L225 Difference]: With dead ends: 49005 [2021-05-03 17:19:46,303 INFO L226 Difference]: Without dead ends: 48987 [2021-05-03 17:19:46,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:46,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48987 states. [2021-05-03 17:19:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48987 to 45643. [2021-05-03 17:19:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45643 states, 45642 states have (on average 4.534726786731519) internal successors, (206974), 45642 states have internal predecessors, (206974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45643 states to 45643 states and 206974 transitions. [2021-05-03 17:19:47,692 INFO L78 Accepts]: Start accepts. Automaton has 45643 states and 206974 transitions. Word has length 25 [2021-05-03 17:19:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:47,692 INFO L480 AbstractCegarLoop]: Abstraction has 45643 states and 206974 transitions. [2021-05-03 17:19:47,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) 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) [2021-05-03 17:19:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 45643 states and 206974 transitions. [2021-05-03 17:19:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:47,815 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:47,815 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:48,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 17:19:48,026 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:48,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:48,026 INFO L82 PathProgramCache]: Analyzing trace with hash 706782640, now seen corresponding path program 2 times [2021-05-03 17:19:48,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:48,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491366043] [2021-05-03 17:19:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:48,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491366043] [2021-05-03 17:19:48,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209189143] [2021-05-03 17:19:48,051 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 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 [2021-05-03 17:19:48,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:19:48,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:48,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:19:48,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:48,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:48,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-03 17:19:48,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049176259] [2021-05-03 17:19:48,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:19:48,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:48,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:19:48,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:19:48,147 INFO L87 Difference]: Start difference. First operand 45643 states and 206974 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:49,028 INFO L93 Difference]: Finished difference Result 52382 states and 233498 transitions. [2021-05-03 17:19:49,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:19:49,028 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:19:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:49,250 INFO L225 Difference]: With dead ends: 52382 [2021-05-03 17:19:49,250 INFO L226 Difference]: Without dead ends: 52382 [2021-05-03 17:19:49,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:19:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52382 states. [2021-05-03 17:19:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52382 to 45586. [2021-05-03 17:19:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45586 states, 45585 states have (on average 4.529231106723703) internal successors, (206465), 45585 states have internal predecessors, (206465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45586 states to 45586 states and 206465 transitions. [2021-05-03 17:19:50,757 INFO L78 Accepts]: Start accepts. Automaton has 45586 states and 206465 transitions. Word has length 25 [2021-05-03 17:19:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:50,757 INFO L480 AbstractCegarLoop]: Abstraction has 45586 states and 206465 transitions. [2021-05-03 17:19:50,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:50,757 INFO L276 IsEmpty]: Start isEmpty. Operand 45586 states and 206465 transitions. [2021-05-03 17:19:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:50,861 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:50,861 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:51,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 17:19:51,062 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1083621228, now seen corresponding path program 3 times [2021-05-03 17:19:51,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:51,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424042207] [2021-05-03 17:19:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:51,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424042207] [2021-05-03 17:19:51,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771447554] [2021-05-03 17:19:51,095 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 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 [2021-05-03 17:19:51,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:19:51,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:19:51,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:51,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 17:19:51,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-05-03 17:19:51,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888059553] [2021-05-03 17:19:51,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 17:19:51,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 17:19:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:19:51,174 INFO L87 Difference]: Start difference. First operand 45586 states and 206465 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-03 17:19:51,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:51,934 INFO L93 Difference]: Finished difference Result 57895 states and 256438 transitions. [2021-05-03 17:19:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:19:51,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 25 [2021-05-03 17:19:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:52,151 INFO L225 Difference]: With dead ends: 57895 [2021-05-03 17:19:52,152 INFO L226 Difference]: Without dead ends: 57813 [2021-05-03 17:19:52,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:19:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57813 states. [2021-05-03 17:19:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57813 to 48438. [2021-05-03 17:19:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48438 states, 48437 states have (on average 4.527179635402688) internal successors, (219283), 48437 states have internal predecessors, (219283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48438 states to 48438 states and 219283 transitions. [2021-05-03 17:19:53,843 INFO L78 Accepts]: Start accepts. Automaton has 48438 states and 219283 transitions. Word has length 25 [2021-05-03 17:19:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:53,843 INFO L480 AbstractCegarLoop]: Abstraction has 48438 states and 219283 transitions. [2021-05-03 17:19:53,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-03 17:19:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 48438 states and 219283 transitions. [2021-05-03 17:19:54,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:54,380 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:54,380 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:54,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:19:54,594 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash 137417170, now seen corresponding path program 5 times [2021-05-03 17:19:54,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:54,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841679042] [2021-05-03 17:19:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:54,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841679042] [2021-05-03 17:19:54,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180973782] [2021-05-03 17:19:54,640 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 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 [2021-05-03 17:19:54,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:19:54,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:19:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:54,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:54,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:19:54,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639052650] [2021-05-03 17:19:54,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:19:54,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:54,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:19:54,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:54,711 INFO L87 Difference]: Start difference. First operand 48438 states and 219283 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:19:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:55,198 INFO L93 Difference]: Finished difference Result 50929 states and 229156 transitions. [2021-05-03 17:19:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:19:55,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:19:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:55,427 INFO L225 Difference]: With dead ends: 50929 [2021-05-03 17:19:55,428 INFO L226 Difference]: Without dead ends: 50853 [2021-05-03 17:19:55,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50853 states. [2021-05-03 17:19:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50853 to 48508. [2021-05-03 17:19:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48508 states, 48507 states have (on average 4.528872121549467) internal successors, (219682), 48507 states have internal predecessors, (219682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48508 states to 48508 states and 219682 transitions. [2021-05-03 17:19:56,862 INFO L78 Accepts]: Start accepts. Automaton has 48508 states and 219682 transitions. Word has length 25 [2021-05-03 17:19:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:56,862 INFO L480 AbstractCegarLoop]: Abstraction has 48508 states and 219682 transitions. [2021-05-03 17:19:56,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:19:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 48508 states and 219682 transitions. [2021-05-03 17:19:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:56,969 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:56,969 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:57,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-03 17:19:57,185 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:57,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1704182322, now seen corresponding path program 6 times [2021-05-03 17:19:57,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:57,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251690512] [2021-05-03 17:19:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:57,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251690512] [2021-05-03 17:19:57,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81957310] [2021-05-03 17:19:57,257 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 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 [2021-05-03 17:19:57,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 17:19:57,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:19:57,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:19:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:19:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:57,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:19:57,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:19:57,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257315359] [2021-05-03 17:19:57,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:19:57,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:19:57,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:57,596 INFO L87 Difference]: Start difference. First operand 48508 states and 219682 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:19:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:58,029 INFO L93 Difference]: Finished difference Result 51004 states and 229666 transitions. [2021-05-03 17:19:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:19:58,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:19:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:58,243 INFO L225 Difference]: With dead ends: 51004 [2021-05-03 17:19:58,243 INFO L226 Difference]: Without dead ends: 50928 [2021-05-03 17:19:58,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:19:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50928 states. [2021-05-03 17:19:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50928 to 48683. [2021-05-03 17:19:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48683 states, 48682 states have (on average 4.53103816605727) internal successors, (220580), 48682 states have internal predecessors, (220580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48683 states to 48683 states and 220580 transitions. [2021-05-03 17:19:59,795 INFO L78 Accepts]: Start accepts. Automaton has 48683 states and 220580 transitions. Word has length 25 [2021-05-03 17:19:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:59,795 INFO L480 AbstractCegarLoop]: Abstraction has 48683 states and 220580 transitions. [2021-05-03 17:19:59,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:19:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 48683 states and 220580 transitions. [2021-05-03 17:19:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:19:59,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:59,917 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:00,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:00,132 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2017642098, now seen corresponding path program 7 times [2021-05-03 17:20:00,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:00,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839768256] [2021-05-03 17:20:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:00,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839768256] [2021-05-03 17:20:00,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11194606] [2021-05-03 17:20:00,246 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 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 [2021-05-03 17:20:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:20:00,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:00,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:00,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:20:00,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255005249] [2021-05-03 17:20:00,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:20:00,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:20:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:20:00,331 INFO L87 Difference]: Start difference. First operand 48683 states and 220580 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:20:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:01,086 INFO L93 Difference]: Finished difference Result 50388 states and 227448 transitions. [2021-05-03 17:20:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:20:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:20:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:01,314 INFO L225 Difference]: With dead ends: 50388 [2021-05-03 17:20:01,314 INFO L226 Difference]: Without dead ends: 50312 [2021-05-03 17:20:01,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:20:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50312 states. [2021-05-03 17:20:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50312 to 48763. [2021-05-03 17:20:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48763 states, 48762 states have (on average 4.531930601698043) internal successors, (220986), 48762 states have internal predecessors, (220986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48763 states to 48763 states and 220986 transitions. [2021-05-03 17:20:02,840 INFO L78 Accepts]: Start accepts. Automaton has 48763 states and 220986 transitions. Word has length 25 [2021-05-03 17:20:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:02,840 INFO L480 AbstractCegarLoop]: Abstraction has 48763 states and 220986 transitions. [2021-05-03 17:20:02,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:20:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 48763 states and 220986 transitions. [2021-05-03 17:20:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:02,975 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:02,975 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:03,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-03 17:20:03,176 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash -660900726, now seen corresponding path program 8 times [2021-05-03 17:20:03,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:03,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175140770] [2021-05-03 17:20:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:20:03,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175140770] [2021-05-03 17:20:03,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554658340] [2021-05-03 17:20:03,337 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 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 [2021-05-03 17:20:03,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:20:03,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:03,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:20:03,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:20:03,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:03,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:20:03,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930406415] [2021-05-03 17:20:03,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:20:03,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:20:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:20:03,418 INFO L87 Difference]: Start difference. First operand 48763 states and 220986 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:20:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:04,323 INFO L93 Difference]: Finished difference Result 49777 states and 225048 transitions. [2021-05-03 17:20:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:20:04,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:20:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:04,571 INFO L225 Difference]: With dead ends: 49777 [2021-05-03 17:20:04,571 INFO L226 Difference]: Without dead ends: 49701 [2021-05-03 17:20:04,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:20:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49701 states. [2021-05-03 17:20:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49701 to 48821. [2021-05-03 17:20:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 48820 states have (on average 4.532548136009832) internal successors, (221279), 48820 states have internal predecessors, (221279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 221279 transitions. [2021-05-03 17:20:06,294 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 221279 transitions. Word has length 25 [2021-05-03 17:20:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:06,294 INFO L480 AbstractCegarLoop]: Abstraction has 48821 states and 221279 transitions. [2021-05-03 17:20:06,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:20:06,294 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 221279 transitions. [2021-05-03 17:20:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:06,439 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:06,439 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:06,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-03 17:20:06,655 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:06,655 INFO L82 PathProgramCache]: Analyzing trace with hash -186895918, now seen corresponding path program 9 times [2021-05-03 17:20:06,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:06,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752322624] [2021-05-03 17:20:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:06,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752322624] [2021-05-03 17:20:06,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264102659] [2021-05-03 17:20:06,797 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:20:06,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:20:06,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:20:06,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:06,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:06,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 17:20:06,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559684487] [2021-05-03 17:20:06,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:20:06,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:06,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:20:06,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:20:06,945 INFO L87 Difference]: Start difference. First operand 48821 states and 221279 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:07,644 INFO L93 Difference]: Finished difference Result 61471 states and 276775 transitions. [2021-05-03 17:20:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:20:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:20:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:08,316 INFO L225 Difference]: With dead ends: 61471 [2021-05-03 17:20:08,316 INFO L226 Difference]: Without dead ends: 61261 [2021-05-03 17:20:08,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:20:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61261 states. [2021-05-03 17:20:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61261 to 49380. [2021-05-03 17:20:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49380 states, 49379 states have (on average 4.533911176816056) internal successors, (223880), 49379 states have internal predecessors, (223880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49380 states to 49380 states and 223880 transitions. [2021-05-03 17:20:10,057 INFO L78 Accepts]: Start accepts. Automaton has 49380 states and 223880 transitions. Word has length 25 [2021-05-03 17:20:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:10,057 INFO L480 AbstractCegarLoop]: Abstraction has 49380 states and 223880 transitions. [2021-05-03 17:20:10,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 49380 states and 223880 transitions. [2021-05-03 17:20:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:10,180 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:10,180 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:10,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 17:20:10,397 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash -567050456, now seen corresponding path program 10 times [2021-05-03 17:20:10,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:10,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948364318] [2021-05-03 17:20:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:10,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948364318] [2021-05-03 17:20:10,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238704963] [2021-05-03 17:20:10,541 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 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 [2021-05-03 17:20:10,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:20:10,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:20:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:10,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:10,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:20:10,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180493574] [2021-05-03 17:20:10,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:20:10,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:10,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:20:10,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:20:10,732 INFO L87 Difference]: Start difference. First operand 49380 states and 223880 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:11,249 INFO L93 Difference]: Finished difference Result 50018 states and 225904 transitions. [2021-05-03 17:20:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:20:11,250 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:20:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:11,480 INFO L225 Difference]: With dead ends: 50018 [2021-05-03 17:20:11,481 INFO L226 Difference]: Without dead ends: 49718 [2021-05-03 17:20:11,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:20:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49718 states. [2021-05-03 17:20:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49718 to 49354. [2021-05-03 17:20:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49354 states, 49353 states have (on average 4.531072072619699) internal successors, (223622), 49353 states have internal predecessors, (223622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 223622 transitions. [2021-05-03 17:20:13,124 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 223622 transitions. Word has length 25 [2021-05-03 17:20:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:13,125 INFO L480 AbstractCegarLoop]: Abstraction has 49354 states and 223622 transitions. [2021-05-03 17:20:13,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 223622 transitions. [2021-05-03 17:20:13,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:13,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:13,745 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:13,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 17:20:13,945 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:13,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:13,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1169845454, now seen corresponding path program 11 times [2021-05-03 17:20:13,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:13,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072876688] [2021-05-03 17:20:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:14,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072876688] [2021-05-03 17:20:14,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050372480] [2021-05-03 17:20:14,016 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:14,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:20:14,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:20:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:14,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:14,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-03 17:20:14,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399073260] [2021-05-03 17:20:14,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:20:14,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:14,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:20:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:20:14,202 INFO L87 Difference]: Start difference. First operand 49354 states and 223622 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:14,889 INFO L93 Difference]: Finished difference Result 62376 states and 281005 transitions. [2021-05-03 17:20:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:20:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:20:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:15,204 INFO L225 Difference]: With dead ends: 62376 [2021-05-03 17:20:15,205 INFO L226 Difference]: Without dead ends: 62248 [2021-05-03 17:20:15,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:20:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62248 states. [2021-05-03 17:20:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62248 to 49730. [2021-05-03 17:20:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49730 states, 49729 states have (on average 4.530977900219188) internal successors, (225321), 49729 states have internal predecessors, (225321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49730 states to 49730 states and 225321 transitions. [2021-05-03 17:20:16,941 INFO L78 Accepts]: Start accepts. Automaton has 49730 states and 225321 transitions. Word has length 25 [2021-05-03 17:20:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:16,941 INFO L480 AbstractCegarLoop]: Abstraction has 49730 states and 225321 transitions. [2021-05-03 17:20:16,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 49730 states and 225321 transitions. [2021-05-03 17:20:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:17,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:17,054 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:17,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:17,269 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:17,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:17,269 INFO L82 PathProgramCache]: Analyzing trace with hash 919442638, now seen corresponding path program 8 times [2021-05-03 17:20:17,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:17,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556101934] [2021-05-03 17:20:17,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:17,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556101934] [2021-05-03 17:20:17,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036168996] [2021-05-03 17:20:17,324 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 [2021-05-03 17:20:17,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:20:17,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:17,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:20:17,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:17,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:17,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 17:20:17,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004967744] [2021-05-03 17:20:17,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:20:17,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:17,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:20:17,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:20:17,767 INFO L87 Difference]: Start difference. First operand 49730 states and 225321 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) 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) [2021-05-03 17:20:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:18,234 INFO L93 Difference]: Finished difference Result 55842 states and 250391 transitions. [2021-05-03 17:20:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:20:18,240 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) 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 25 [2021-05-03 17:20:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:18,466 INFO L225 Difference]: With dead ends: 55842 [2021-05-03 17:20:18,466 INFO L226 Difference]: Without dead ends: 55751 [2021-05-03 17:20:18,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:20:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55751 states. [2021-05-03 17:20:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55751 to 51654. [2021-05-03 17:20:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51654 states, 51653 states have (on average 4.536793603469305) internal successors, (234339), 51653 states have internal predecessors, (234339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51654 states to 51654 states and 234339 transitions. [2021-05-03 17:20:20,047 INFO L78 Accepts]: Start accepts. Automaton has 51654 states and 234339 transitions. Word has length 25 [2021-05-03 17:20:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:20,047 INFO L480 AbstractCegarLoop]: Abstraction has 51654 states and 234339 transitions. [2021-05-03 17:20:20,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) 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) [2021-05-03 17:20:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 51654 states and 234339 transitions. [2021-05-03 17:20:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:20,166 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:20,167 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:20,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:20,368 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1371587662, now seen corresponding path program 4 times [2021-05-03 17:20:20,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:20,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970362063] [2021-05-03 17:20:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:20,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970362063] [2021-05-03 17:20:20,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248781804] [2021-05-03 17:20:20,421 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 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 [2021-05-03 17:20:20,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:20:20,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:20,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:20:20,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:20,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:20,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 17:20:20,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023016734] [2021-05-03 17:20:20,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:20:20,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:20:20,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:20:20,500 INFO L87 Difference]: Start difference. First operand 51654 states and 234339 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:21,266 INFO L93 Difference]: Finished difference Result 59499 states and 265112 transitions. [2021-05-03 17:20:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:20:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:20:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:21,513 INFO L225 Difference]: With dead ends: 59499 [2021-05-03 17:20:21,513 INFO L226 Difference]: Without dead ends: 59499 [2021-05-03 17:20:21,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:20:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59499 states. [2021-05-03 17:20:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59499 to 51650. [2021-05-03 17:20:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51650 states, 51649 states have (on average 4.532401401769637) internal successors, (234094), 51649 states have internal predecessors, (234094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51650 states to 51650 states and 234094 transitions. [2021-05-03 17:20:23,329 INFO L78 Accepts]: Start accepts. Automaton has 51650 states and 234094 transitions. Word has length 25 [2021-05-03 17:20:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:23,330 INFO L480 AbstractCegarLoop]: Abstraction has 51650 states and 234094 transitions. [2021-05-03 17:20:23,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 51650 states and 234094 transitions. [2021-05-03 17:20:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:23,472 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:23,472 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:23,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:23,672 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:23,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1828705168, now seen corresponding path program 5 times [2021-05-03 17:20:23,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:23,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098113790] [2021-05-03 17:20:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:23,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098113790] [2021-05-03 17:20:23,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315160027] [2021-05-03 17:20:23,722 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:23,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:20:23,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:23,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:20:23,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:23,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:23,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 17:20:23,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161080953] [2021-05-03 17:20:23,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:20:23,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:20:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:20:23,795 INFO L87 Difference]: Start difference. First operand 51650 states and 234094 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-03 17:20:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:24,333 INFO L93 Difference]: Finished difference Result 56113 states and 251795 transitions. [2021-05-03 17:20:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:20:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-05-03 17:20:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:25,057 INFO L225 Difference]: With dead ends: 56113 [2021-05-03 17:20:25,057 INFO L226 Difference]: Without dead ends: 56095 [2021-05-03 17:20:25,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:20:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56095 states. [2021-05-03 17:20:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56095 to 51686. [2021-05-03 17:20:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51686 states, 51685 states have (on average 4.531721002225017) internal successors, (234222), 51685 states have internal predecessors, (234222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51686 states to 51686 states and 234222 transitions. [2021-05-03 17:20:26,827 INFO L78 Accepts]: Start accepts. Automaton has 51686 states and 234222 transitions. Word has length 25 [2021-05-03 17:20:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:26,829 INFO L480 AbstractCegarLoop]: Abstraction has 51686 states and 234222 transitions. [2021-05-03 17:20:26,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-03 17:20:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 51686 states and 234222 transitions. [2021-05-03 17:20:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:26,952 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:26,952 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:27,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:27,155 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:27,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1290086910, now seen corresponding path program 6 times [2021-05-03 17:20:27,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:27,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960124470] [2021-05-03 17:20:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:27,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960124470] [2021-05-03 17:20:27,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950159074] [2021-05-03 17:20:27,201 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 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 [2021-05-03 17:20:27,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:20:27,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:27,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:20:27,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:27,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:27,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:20:27,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700707070] [2021-05-03 17:20:27,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:20:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:20:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:20:27,265 INFO L87 Difference]: Start difference. First operand 51686 states and 234222 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-05-03 17:20:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:27,765 INFO L93 Difference]: Finished difference Result 58399 states and 261556 transitions. [2021-05-03 17:20:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:20:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 25 [2021-05-03 17:20:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:27,998 INFO L225 Difference]: With dead ends: 58399 [2021-05-03 17:20:27,999 INFO L226 Difference]: Without dead ends: 58399 [2021-05-03 17:20:27,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:20:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58399 states. [2021-05-03 17:20:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58399 to 51724. [2021-05-03 17:20:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51724 states, 51723 states have (on average 4.5306536743808365) internal successors, (234339), 51723 states have internal predecessors, (234339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51724 states to 51724 states and 234339 transitions. [2021-05-03 17:20:29,791 INFO L78 Accepts]: Start accepts. Automaton has 51724 states and 234339 transitions. Word has length 25 [2021-05-03 17:20:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:29,792 INFO L480 AbstractCegarLoop]: Abstraction has 51724 states and 234339 transitions. [2021-05-03 17:20:29,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-05-03 17:20:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 51724 states and 234339 transitions. [2021-05-03 17:20:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:30,281 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:30,281 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:30,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 17:20:30,493 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:30,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:30,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2119082106, now seen corresponding path program 7 times [2021-05-03 17:20:30,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:30,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585779901] [2021-05-03 17:20:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:30,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585779901] [2021-05-03 17:20:30,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81472644] [2021-05-03 17:20:30,543 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:20:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:20:30,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:30,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:30,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 17:20:30,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609072039] [2021-05-03 17:20:30,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:20:30,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:30,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:20:30,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:20:30,654 INFO L87 Difference]: Start difference. First operand 51724 states and 234339 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-05-03 17:20:31,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:31,147 INFO L93 Difference]: Finished difference Result 51994 states and 235188 transitions. [2021-05-03 17:20:31,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:20:31,148 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-05-03 17:20:31,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:31,346 INFO L225 Difference]: With dead ends: 51994 [2021-05-03 17:20:31,346 INFO L226 Difference]: Without dead ends: 51894 [2021-05-03 17:20:31,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:20:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51894 states. [2021-05-03 17:20:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51894 to 51730. [2021-05-03 17:20:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51730 states, 51729 states have (on average 4.530263488565408) internal successors, (234346), 51729 states have internal predecessors, (234346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51730 states to 51730 states and 234346 transitions. [2021-05-03 17:20:32,942 INFO L78 Accepts]: Start accepts. Automaton has 51730 states and 234346 transitions. Word has length 25 [2021-05-03 17:20:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:32,942 INFO L480 AbstractCegarLoop]: Abstraction has 51730 states and 234346 transitions. [2021-05-03 17:20:32,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-05-03 17:20:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 51730 states and 234346 transitions. [2021-05-03 17:20:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:33,089 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:33,089 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:33,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 17:20:33,289 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash -656052858, now seen corresponding path program 8 times [2021-05-03 17:20:33,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:33,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214081517] [2021-05-03 17:20:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:33,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214081517] [2021-05-03 17:20:33,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265655758] [2021-05-03 17:20:33,330 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 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 [2021-05-03 17:20:33,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:20:33,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:33,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:20:33,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:33,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:33,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:20:33,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571325050] [2021-05-03 17:20:33,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:20:33,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:33,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:20:33,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:20:33,458 INFO L87 Difference]: Start difference. First operand 51730 states and 234346 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-05-03 17:20:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:34,813 INFO L93 Difference]: Finished difference Result 100286 states and 445039 transitions. [2021-05-03 17:20:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 17:20:34,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 25 [2021-05-03 17:20:34,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:35,246 INFO L225 Difference]: With dead ends: 100286 [2021-05-03 17:20:35,247 INFO L226 Difference]: Without dead ends: 100286 [2021-05-03 17:20:35,247 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:20:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100286 states. [2021-05-03 17:20:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100286 to 64386. [2021-05-03 17:20:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64386 states, 64385 states have (on average 4.569511532189175) internal successors, (294208), 64385 states have internal predecessors, (294208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64386 states to 64386 states and 294208 transitions. [2021-05-03 17:20:38,212 INFO L78 Accepts]: Start accepts. Automaton has 64386 states and 294208 transitions. Word has length 25 [2021-05-03 17:20:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:38,212 INFO L480 AbstractCegarLoop]: Abstraction has 64386 states and 294208 transitions. [2021-05-03 17:20:38,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-05-03 17:20:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 64386 states and 294208 transitions. [2021-05-03 17:20:38,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:38,380 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:38,380 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:38,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-03 17:20:38,589 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1715216728, now seen corresponding path program 9 times [2021-05-03 17:20:38,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:38,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563497747] [2021-05-03 17:20:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:38,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563497747] [2021-05-03 17:20:38,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604130139] [2021-05-03 17:20:38,659 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 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 [2021-05-03 17:20:38,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:20:38,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:38,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:20:38,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:38,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:38,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 17:20:38,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504762386] [2021-05-03 17:20:38,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:20:38,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:20:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:20:38,759 INFO L87 Difference]: Start difference. First operand 64386 states and 294208 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-05-03 17:20:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:39,935 INFO L93 Difference]: Finished difference Result 81238 states and 361064 transitions. [2021-05-03 17:20:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:20:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-05-03 17:20:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:40,275 INFO L225 Difference]: With dead ends: 81238 [2021-05-03 17:20:40,275 INFO L226 Difference]: Without dead ends: 81238 [2021-05-03 17:20:40,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:20:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81238 states. [2021-05-03 17:20:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81238 to 65346. [2021-05-03 17:20:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65346 states, 65345 states have (on average 4.563042313872523) internal successors, (298172), 65345 states have internal predecessors, (298172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65346 states to 65346 states and 298172 transitions. [2021-05-03 17:20:42,391 INFO L78 Accepts]: Start accepts. Automaton has 65346 states and 298172 transitions. Word has length 25 [2021-05-03 17:20:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:42,391 INFO L480 AbstractCegarLoop]: Abstraction has 65346 states and 298172 transitions. [2021-05-03 17:20:42,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-05-03 17:20:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 65346 states and 298172 transitions. [2021-05-03 17:20:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:42,550 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:42,550 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:42,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:42,753 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:42,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1504675330, now seen corresponding path program 10 times [2021-05-03 17:20:42,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:42,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51506433] [2021-05-03 17:20:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:42,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51506433] [2021-05-03 17:20:42,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46720659] [2021-05-03 17:20:42,811 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 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 [2021-05-03 17:20:42,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:20:42,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:42,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:20:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:42,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:42,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:20:42,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070956360] [2021-05-03 17:20:42,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:20:42,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:20:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:20:42,899 INFO L87 Difference]: Start difference. First operand 65346 states and 298172 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:44,078 INFO L93 Difference]: Finished difference Result 78221 states and 353751 transitions. [2021-05-03 17:20:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:20:44,079 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:20:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:44,466 INFO L225 Difference]: With dead ends: 78221 [2021-05-03 17:20:44,466 INFO L226 Difference]: Without dead ends: 78075 [2021-05-03 17:20:44,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:20:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78075 states. [2021-05-03 17:20:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78075 to 65316. [2021-05-03 17:20:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65316 states, 65315 states have (on average 4.563530582561433) internal successors, (298067), 65315 states have internal predecessors, (298067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65316 states to 65316 states and 298067 transitions. [2021-05-03 17:20:47,348 INFO L78 Accepts]: Start accepts. Automaton has 65316 states and 298067 transitions. Word has length 25 [2021-05-03 17:20:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:47,348 INFO L480 AbstractCegarLoop]: Abstraction has 65316 states and 298067 transitions. [2021-05-03 17:20:47,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 65316 states and 298067 transitions. [2021-05-03 17:20:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:47,546 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:47,547 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:47,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-03 17:20:47,747 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:47,748 INFO L82 PathProgramCache]: Analyzing trace with hash -423308966, now seen corresponding path program 11 times [2021-05-03 17:20:47,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:47,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092147139] [2021-05-03 17:20:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:47,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092147139] [2021-05-03 17:20:47,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966639950] [2021-05-03 17:20:47,811 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 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 [2021-05-03 17:20:47,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:20:47,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:20:47,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:47,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:47,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:20:47,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835886448] [2021-05-03 17:20:47,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:20:47,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:20:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:20:47,907 INFO L87 Difference]: Start difference. First operand 65316 states and 298067 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:48,977 INFO L93 Difference]: Finished difference Result 104463 states and 464626 transitions. [2021-05-03 17:20:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:20:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:20:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:49,537 INFO L225 Difference]: With dead ends: 104463 [2021-05-03 17:20:49,537 INFO L226 Difference]: Without dead ends: 104445 [2021-05-03 17:20:49,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:20:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104445 states. [2021-05-03 17:20:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104445 to 67860. [2021-05-03 17:20:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67860 states, 67859 states have (on average 4.565348737824017) internal successors, (309800), 67859 states have internal predecessors, (309800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67860 states to 67860 states and 309800 transitions. [2021-05-03 17:20:52,784 INFO L78 Accepts]: Start accepts. Automaton has 67860 states and 309800 transitions. Word has length 25 [2021-05-03 17:20:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:52,784 INFO L480 AbstractCegarLoop]: Abstraction has 67860 states and 309800 transitions. [2021-05-03 17:20:52,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 67860 states and 309800 transitions. [2021-05-03 17:20:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:52,978 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:52,978 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:53,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 17:20:53,179 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:53,182 INFO L82 PathProgramCache]: Analyzing trace with hash -206280976, now seen corresponding path program 12 times [2021-05-03 17:20:53,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:53,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277588146] [2021-05-03 17:20:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:53,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277588146] [2021-05-03 17:20:53,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196879985] [2021-05-03 17:20:53,250 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 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 [2021-05-03 17:20:53,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 17:20:53,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:20:53,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:20:53,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:53,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:53,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:20:53,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161563323] [2021-05-03 17:20:53,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:20:53,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:53,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:20:53,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:20:53,348 INFO L87 Difference]: Start difference. First operand 67860 states and 309800 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:54,691 INFO L93 Difference]: Finished difference Result 90415 states and 405203 transitions. [2021-05-03 17:20:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:20:54,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:20:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:20:55,092 INFO L225 Difference]: With dead ends: 90415 [2021-05-03 17:20:55,092 INFO L226 Difference]: Without dead ends: 90415 [2021-05-03 17:20:55,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:20:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90415 states. [2021-05-03 17:20:57,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90415 to 68043. [2021-05-03 17:20:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68043 states, 68042 states have (on average 4.564915787307839) internal successors, (310606), 68042 states have internal predecessors, (310606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68043 states to 68043 states and 310606 transitions. [2021-05-03 17:20:57,555 INFO L78 Accepts]: Start accepts. Automaton has 68043 states and 310606 transitions. Word has length 25 [2021-05-03 17:20:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:20:57,555 INFO L480 AbstractCegarLoop]: Abstraction has 68043 states and 310606 transitions. [2021-05-03 17:20:57,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 68043 states and 310606 transitions. [2021-05-03 17:20:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:20:58,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:20:58,229 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:20:58,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:20:58,430 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:20:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:20:58,430 INFO L82 PathProgramCache]: Analyzing trace with hash 64907726, now seen corresponding path program 13 times [2021-05-03 17:20:58,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:20:58,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530488821] [2021-05-03 17:20:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:20:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:58,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530488821] [2021-05-03 17:20:58,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469960054] [2021-05-03 17:20:58,506 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 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 [2021-05-03 17:20:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:20:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:20:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:20:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:20:58,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:20:58,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:20:58,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144292389] [2021-05-03 17:20:58,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:20:58,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:20:58,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:20:58,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:20:58,603 INFO L87 Difference]: Start difference. First operand 68043 states and 310606 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:20:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:20:59,595 INFO L93 Difference]: Finished difference Result 123026 states and 549593 transitions. [2021-05-03 17:20:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 17:20:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:20:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:00,666 INFO L225 Difference]: With dead ends: 123026 [2021-05-03 17:21:00,666 INFO L226 Difference]: Without dead ends: 123026 [2021-05-03 17:21:00,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:21:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123026 states. [2021-05-03 17:21:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123026 to 79556. [2021-05-03 17:21:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79556 states, 79555 states have (on average 4.561121236880146) internal successors, (362860), 79555 states have internal predecessors, (362860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79556 states to 79556 states and 362860 transitions. [2021-05-03 17:21:03,863 INFO L78 Accepts]: Start accepts. Automaton has 79556 states and 362860 transitions. Word has length 25 [2021-05-03 17:21:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:03,863 INFO L480 AbstractCegarLoop]: Abstraction has 79556 states and 362860 transitions. [2021-05-03 17:21:03,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 79556 states and 362860 transitions. [2021-05-03 17:21:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:04,119 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:04,119 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:04,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-03 17:21:04,336 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash 115677808, now seen corresponding path program 14 times [2021-05-03 17:21:04,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:04,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894275980] [2021-05-03 17:21:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:04,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894275980] [2021-05-03 17:21:04,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859578134] [2021-05-03 17:21:04,413 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 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 [2021-05-03 17:21:04,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:21:04,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:21:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:21:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:04,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:04,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 17:21:04,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307467521] [2021-05-03 17:21:04,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:21:04,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:04,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:21:04,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:21:04,495 INFO L87 Difference]: Start difference. First operand 79556 states and 362860 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-03 17:21:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:05,452 INFO L93 Difference]: Finished difference Result 96478 states and 429704 transitions. [2021-05-03 17:21:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 17:21:05,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 25 [2021-05-03 17:21:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:06,473 INFO L225 Difference]: With dead ends: 96478 [2021-05-03 17:21:06,473 INFO L226 Difference]: Without dead ends: 96478 [2021-05-03 17:21:06,473 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:21:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96478 states. [2021-05-03 17:21:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96478 to 80282. [2021-05-03 17:21:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80282 states, 80281 states have (on average 4.555660741644972) internal successors, (365733), 80281 states have internal predecessors, (365733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80282 states to 80282 states and 365733 transitions. [2021-05-03 17:21:09,627 INFO L78 Accepts]: Start accepts. Automaton has 80282 states and 365733 transitions. Word has length 25 [2021-05-03 17:21:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:09,628 INFO L480 AbstractCegarLoop]: Abstraction has 80282 states and 365733 transitions. [2021-05-03 17:21:09,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-03 17:21:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 80282 states and 365733 transitions. [2021-05-03 17:21:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:09,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:09,850 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:10,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:10,057 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1557868062, now seen corresponding path program 15 times [2021-05-03 17:21:10,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:10,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245488758] [2021-05-03 17:21:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:10,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245488758] [2021-05-03 17:21:10,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430775711] [2021-05-03 17:21:10,107 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 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 [2021-05-03 17:21:10,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:21:10,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:21:10,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:21:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:10,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:10,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:21:10,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740981191] [2021-05-03 17:21:10,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:21:10,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:10,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:21:10,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:21:10,565 INFO L87 Difference]: Start difference. First operand 80282 states and 365733 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:11,359 INFO L93 Difference]: Finished difference Result 99599 states and 449196 transitions. [2021-05-03 17:21:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:21:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:21:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:11,812 INFO L225 Difference]: With dead ends: 99599 [2021-05-03 17:21:11,812 INFO L226 Difference]: Without dead ends: 99435 [2021-05-03 17:21:11,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:21:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99435 states. [2021-05-03 17:21:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99435 to 80309. [2021-05-03 17:21:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80309 states, 80308 states have (on average 4.5554863774468295) internal successors, (365842), 80308 states have internal predecessors, (365842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80309 states to 80309 states and 365842 transitions. [2021-05-03 17:21:14,857 INFO L78 Accepts]: Start accepts. Automaton has 80309 states and 365842 transitions. Word has length 25 [2021-05-03 17:21:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:14,857 INFO L480 AbstractCegarLoop]: Abstraction has 80309 states and 365842 transitions. [2021-05-03 17:21:14,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 80309 states and 365842 transitions. [2021-05-03 17:21:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:15,090 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:15,090 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:15,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 17:21:15,305 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:15,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:15,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1245125948, now seen corresponding path program 16 times [2021-05-03 17:21:15,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:15,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134559180] [2021-05-03 17:21:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:15,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134559180] [2021-05-03 17:21:15,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220853432] [2021-05-03 17:21:15,411 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 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 [2021-05-03 17:21:15,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:21:15,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:21:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:21:15,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:15,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:15,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 17:21:15,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118420243] [2021-05-03 17:21:15,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:21:15,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:21:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:21:15,490 INFO L87 Difference]: Start difference. First operand 80309 states and 365842 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:16,736 INFO L93 Difference]: Finished difference Result 80977 states and 368139 transitions. [2021-05-03 17:21:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:21:16,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:21:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:17,114 INFO L225 Difference]: With dead ends: 80977 [2021-05-03 17:21:17,114 INFO L226 Difference]: Without dead ends: 80877 [2021-05-03 17:21:17,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:21:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80877 states. [2021-05-03 17:21:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80877 to 80309. [2021-05-03 17:21:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80309 states, 80308 states have (on average 4.555150171838422) internal successors, (365815), 80308 states have internal predecessors, (365815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80309 states to 80309 states and 365815 transitions. [2021-05-03 17:21:20,649 INFO L78 Accepts]: Start accepts. Automaton has 80309 states and 365815 transitions. Word has length 25 [2021-05-03 17:21:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:20,650 INFO L480 AbstractCegarLoop]: Abstraction has 80309 states and 365815 transitions. [2021-05-03 17:21:20,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 80309 states and 365815 transitions. [2021-05-03 17:21:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:20,924 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:20,924 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:21,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:21,124 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1318763598, now seen corresponding path program 7 times [2021-05-03 17:21:21,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:21,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276045148] [2021-05-03 17:21:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:21,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276045148] [2021-05-03 17:21:21,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560067331] [2021-05-03 17:21:21,149 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 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 [2021-05-03 17:21:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:21,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:21:21,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:21,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 17:21:21,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-05-03 17:21:21,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580123013] [2021-05-03 17:21:21,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:21:21,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:21,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:21:21,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:21:21,210 INFO L87 Difference]: Start difference. First operand 80309 states and 365815 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-05-03 17:21:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:21,914 INFO L93 Difference]: Finished difference Result 85544 states and 384196 transitions. [2021-05-03 17:21:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:21:21,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 25 [2021-05-03 17:21:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:22,284 INFO L225 Difference]: With dead ends: 85544 [2021-05-03 17:21:22,284 INFO L226 Difference]: Without dead ends: 83501 [2021-05-03 17:21:22,285 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:21:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83501 states. [2021-05-03 17:21:24,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83501 to 70435. [2021-05-03 17:21:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70435 states, 70434 states have (on average 4.576113808671948) internal successors, (322314), 70434 states have internal predecessors, (322314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70435 states to 70435 states and 322314 transitions. [2021-05-03 17:21:25,200 INFO L78 Accepts]: Start accepts. Automaton has 70435 states and 322314 transitions. Word has length 25 [2021-05-03 17:21:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:25,217 INFO L480 AbstractCegarLoop]: Abstraction has 70435 states and 322314 transitions. [2021-05-03 17:21:25,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-05-03 17:21:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 70435 states and 322314 transitions. [2021-05-03 17:21:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:25,400 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:25,400 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:25,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:25,601 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:25,601 INFO L82 PathProgramCache]: Analyzing trace with hash 984830642, now seen corresponding path program 8 times [2021-05-03 17:21:25,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:25,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947405845] [2021-05-03 17:21:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:25,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947405845] [2021-05-03 17:21:25,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:21:25,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 17:21:25,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225322940] [2021-05-03 17:21:25,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:21:25,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:21:25,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:21:25,616 INFO L87 Difference]: Start difference. First operand 70435 states and 322314 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-05-03 17:21:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:26,114 INFO L93 Difference]: Finished difference Result 75367 states and 338202 transitions. [2021-05-03 17:21:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 17:21:26,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 25 [2021-05-03 17:21:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:27,009 INFO L225 Difference]: With dead ends: 75367 [2021-05-03 17:21:27,010 INFO L226 Difference]: Without dead ends: 71043 [2021-05-03 17:21:27,010 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:21:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71043 states. [2021-05-03 17:21:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71043 to 53284. [2021-05-03 17:21:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53284 states, 53283 states have (on average 4.5673479346132915) internal successors, (243362), 53283 states have internal predecessors, (243362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53284 states to 53284 states and 243362 transitions. [2021-05-03 17:21:29,068 INFO L78 Accepts]: Start accepts. Automaton has 53284 states and 243362 transitions. Word has length 25 [2021-05-03 17:21:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:29,068 INFO L480 AbstractCegarLoop]: Abstraction has 53284 states and 243362 transitions. [2021-05-03 17:21:29,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-05-03 17:21:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 53284 states and 243362 transitions. [2021-05-03 17:21:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:29,225 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:29,225 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:29,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-03 17:21:29,225 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:29,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1193216718, now seen corresponding path program 9 times [2021-05-03 17:21:29,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:29,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349885046] [2021-05-03 17:21:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:29,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349885046] [2021-05-03 17:21:29,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727631399] [2021-05-03 17:21:29,269 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 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 [2021-05-03 17:21:29,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:21:29,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:21:29,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:21:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:29,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:29,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:21:29,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782386477] [2021-05-03 17:21:29,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:21:29,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:21:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:29,339 INFO L87 Difference]: Start difference. First operand 53284 states and 243362 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:29,878 INFO L93 Difference]: Finished difference Result 55218 states and 250832 transitions. [2021-05-03 17:21:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:21:29,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:21:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:30,164 INFO L225 Difference]: With dead ends: 55218 [2021-05-03 17:21:30,164 INFO L226 Difference]: Without dead ends: 55082 [2021-05-03 17:21:30,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55082 states. [2021-05-03 17:21:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55082 to 53287. [2021-05-03 17:21:31,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53287 states, 53286 states have (on average 4.568685958788425) internal successors, (243447), 53286 states have internal predecessors, (243447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:32,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53287 states to 53287 states and 243447 transitions. [2021-05-03 17:21:32,177 INFO L78 Accepts]: Start accepts. Automaton has 53287 states and 243447 transitions. Word has length 25 [2021-05-03 17:21:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:32,177 INFO L480 AbstractCegarLoop]: Abstraction has 53287 states and 243447 transitions. [2021-05-03 17:21:32,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 53287 states and 243447 transitions. [2021-05-03 17:21:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:32,342 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:32,342 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:32,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:32,543 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:32,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:32,543 INFO L82 PathProgramCache]: Analyzing trace with hash -648382774, now seen corresponding path program 10 times [2021-05-03 17:21:32,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:32,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045477047] [2021-05-03 17:21:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:32,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045477047] [2021-05-03 17:21:32,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345402308] [2021-05-03 17:21:32,605 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:21:32,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:21:32,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:21:32,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:21:32,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:32,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:32,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:21:32,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412979305] [2021-05-03 17:21:32,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:21:32,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:21:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:32,689 INFO L87 Difference]: Start difference. First operand 53287 states and 243447 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:33,605 INFO L93 Difference]: Finished difference Result 55660 states and 252783 transitions. [2021-05-03 17:21:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:21:33,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:21:33,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:33,867 INFO L225 Difference]: With dead ends: 55660 [2021-05-03 17:21:33,867 INFO L226 Difference]: Without dead ends: 55524 [2021-05-03 17:21:33,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55524 states. [2021-05-03 17:21:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55524 to 53321. [2021-05-03 17:21:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53321 states, 53320 states have (on average 4.569617404351088) internal successors, (243652), 53320 states have internal predecessors, (243652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53321 states to 53321 states and 243652 transitions. [2021-05-03 17:21:35,517 INFO L78 Accepts]: Start accepts. Automaton has 53321 states and 243652 transitions. Word has length 25 [2021-05-03 17:21:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:35,517 INFO L480 AbstractCegarLoop]: Abstraction has 53321 states and 243652 transitions. [2021-05-03 17:21:35,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 53321 states and 243652 transitions. [2021-05-03 17:21:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:35,654 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:35,654 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:35,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:35,869 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:35,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:35,869 INFO L82 PathProgramCache]: Analyzing trace with hash -961842550, now seen corresponding path program 11 times [2021-05-03 17:21:35,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:35,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593647730] [2021-05-03 17:21:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:35,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593647730] [2021-05-03 17:21:35,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742742526] [2021-05-03 17:21:35,983 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 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 [2021-05-03 17:21:36,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:21:36,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:21:36,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:21:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:36,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:36,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:21:36,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262917518] [2021-05-03 17:21:36,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:21:36,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:36,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:21:36,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:36,050 INFO L87 Difference]: Start difference. First operand 53321 states and 243652 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:36,965 INFO L93 Difference]: Finished difference Result 54944 states and 250090 transitions. [2021-05-03 17:21:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:21:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:21:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:37,223 INFO L225 Difference]: With dead ends: 54944 [2021-05-03 17:21:37,223 INFO L226 Difference]: Without dead ends: 54828 [2021-05-03 17:21:37,223 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54828 states. [2021-05-03 17:21:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54828 to 53357. [2021-05-03 17:21:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53357 states, 53356 states have (on average 4.570320113951571) internal successors, (243854), 53356 states have internal predecessors, (243854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53357 states to 53357 states and 243854 transitions. [2021-05-03 17:21:39,180 INFO L78 Accepts]: Start accepts. Automaton has 53357 states and 243854 transitions. Word has length 25 [2021-05-03 17:21:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:39,180 INFO L480 AbstractCegarLoop]: Abstraction has 53357 states and 243854 transitions. [2021-05-03 17:21:39,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 53357 states and 243854 transitions. [2021-05-03 17:21:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:39,326 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:39,326 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:39,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-03 17:21:39,527 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:39,528 INFO L82 PathProgramCache]: Analyzing trace with hash 394898822, now seen corresponding path program 12 times [2021-05-03 17:21:39,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:39,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256428362] [2021-05-03 17:21:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:39,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256428362] [2021-05-03 17:21:39,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162666650] [2021-05-03 17:21:39,590 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 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 [2021-05-03 17:21:39,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:21:39,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:21:39,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:21:39,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:39,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:39,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:21:39,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814871211] [2021-05-03 17:21:39,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:21:39,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:39,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:21:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:39,654 INFO L87 Difference]: Start difference. First operand 53357 states and 243854 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:40,116 INFO L93 Difference]: Finished difference Result 54517 states and 248384 transitions. [2021-05-03 17:21:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:21:40,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:21:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:40,333 INFO L225 Difference]: With dead ends: 54517 [2021-05-03 17:21:40,333 INFO L226 Difference]: Without dead ends: 54421 [2021-05-03 17:21:40,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54421 states. [2021-05-03 17:21:41,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54421 to 53379. [2021-05-03 17:21:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53379 states, 53378 states have (on average 4.570815691858069) internal successors, (243981), 53378 states have internal predecessors, (243981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53379 states to 53379 states and 243981 transitions. [2021-05-03 17:21:42,158 INFO L78 Accepts]: Start accepts. Automaton has 53379 states and 243981 transitions. Word has length 25 [2021-05-03 17:21:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:42,158 INFO L480 AbstractCegarLoop]: Abstraction has 53379 states and 243981 transitions. [2021-05-03 17:21:42,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:42,159 INFO L276 IsEmpty]: Start isEmpty. Operand 53379 states and 243981 transitions. [2021-05-03 17:21:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:42,312 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:42,312 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:42,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:42,513 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:42,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:42,514 INFO L82 PathProgramCache]: Analyzing trace with hash 267220118, now seen corresponding path program 13 times [2021-05-03 17:21:42,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:42,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228182164] [2021-05-03 17:21:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:42,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228182164] [2021-05-03 17:21:42,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266646560] [2021-05-03 17:21:42,567 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 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 [2021-05-03 17:21:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:21:42,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:42,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:42,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:21:42,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561145344] [2021-05-03 17:21:42,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:21:42,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:21:42,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:42,652 INFO L87 Difference]: Start difference. First operand 53379 states and 243981 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:43,490 INFO L93 Difference]: Finished difference Result 56039 states and 254275 transitions. [2021-05-03 17:21:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:21:43,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:21:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:43,776 INFO L225 Difference]: With dead ends: 56039 [2021-05-03 17:21:43,776 INFO L226 Difference]: Without dead ends: 55903 [2021-05-03 17:21:43,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55903 states. [2021-05-03 17:21:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55903 to 53420. [2021-05-03 17:21:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53420 states, 53419 states have (on average 4.571800295774912) internal successors, (244221), 53419 states have internal predecessors, (244221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53420 states to 53420 states and 244221 transitions. [2021-05-03 17:21:45,805 INFO L78 Accepts]: Start accepts. Automaton has 53420 states and 244221 transitions. Word has length 25 [2021-05-03 17:21:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:45,805 INFO L480 AbstractCegarLoop]: Abstraction has 53420 states and 244221 transitions. [2021-05-03 17:21:45,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 53420 states and 244221 transitions. [2021-05-03 17:21:45,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:45,975 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:45,975 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:46,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-03 17:21:46,178 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:46,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1366340886, now seen corresponding path program 12 times [2021-05-03 17:21:46,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:46,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842077186] [2021-05-03 17:21:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:46,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842077186] [2021-05-03 17:21:46,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413813872] [2021-05-03 17:21:46,213 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:21:46,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:21:46,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:21:46,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:46,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:46,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 17:21:46,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765048581] [2021-05-03 17:21:46,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:21:46,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:46,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:21:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:21:46,312 INFO L87 Difference]: Start difference. First operand 53420 states and 244221 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-05-03 17:21:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:47,590 INFO L93 Difference]: Finished difference Result 81130 states and 366034 transitions. [2021-05-03 17:21:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:21:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-05-03 17:21:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:47,965 INFO L225 Difference]: With dead ends: 81130 [2021-05-03 17:21:47,965 INFO L226 Difference]: Without dead ends: 80729 [2021-05-03 17:21:47,965 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:21:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80729 states. [2021-05-03 17:21:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80729 to 69515. [2021-05-03 17:21:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69515 states, 69514 states have (on average 4.596815030065886) internal successors, (319543), 69514 states have internal predecessors, (319543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69515 states to 69515 states and 319543 transitions. [2021-05-03 17:21:50,772 INFO L78 Accepts]: Start accepts. Automaton has 69515 states and 319543 transitions. Word has length 25 [2021-05-03 17:21:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:50,772 INFO L480 AbstractCegarLoop]: Abstraction has 69515 states and 319543 transitions. [2021-05-03 17:21:50,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-05-03 17:21:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 69515 states and 319543 transitions. [2021-05-03 17:21:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:50,990 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:50,990 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:51,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:51,190 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:51,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1436234450, now seen corresponding path program 13 times [2021-05-03 17:21:51,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:51,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139333547] [2021-05-03 17:21:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139333547] [2021-05-03 17:21:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062258160] [2021-05-03 17:21:51,223 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 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 [2021-05-03 17:21:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:51,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:21:51,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:21:51,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:51,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 17:21:51,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093524012] [2021-05-03 17:21:51,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:21:51,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:51,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:21:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:21:51,308 INFO L87 Difference]: Start difference. First operand 69515 states and 319543 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-05-03 17:21:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:52,635 INFO L93 Difference]: Finished difference Result 88632 states and 402862 transitions. [2021-05-03 17:21:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:21:52,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-05-03 17:21:52,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:52,990 INFO L225 Difference]: With dead ends: 88632 [2021-05-03 17:21:52,990 INFO L226 Difference]: Without dead ends: 88489 [2021-05-03 17:21:52,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-05-03 17:21:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88489 states. [2021-05-03 17:21:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88489 to 80313. [2021-05-03 17:21:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80313 states, 80312 states have (on average 4.627652156589302) internal successors, (371656), 80312 states have internal predecessors, (371656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:21:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80313 states to 80313 states and 371656 transitions. [2021-05-03 17:21:56,127 INFO L78 Accepts]: Start accepts. Automaton has 80313 states and 371656 transitions. Word has length 25 [2021-05-03 17:21:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:21:56,128 INFO L480 AbstractCegarLoop]: Abstraction has 80313 states and 371656 transitions. [2021-05-03 17:21:56,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-05-03 17:21:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 80313 states and 371656 transitions. [2021-05-03 17:21:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:21:56,374 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:21:56,374 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:21:56,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:21:56,575 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:21:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:21:56,575 INFO L82 PathProgramCache]: Analyzing trace with hash -46239658, now seen corresponding path program 14 times [2021-05-03 17:21:56,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:21:56,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195967927] [2021-05-03 17:21:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:21:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:21:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:56,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195967927] [2021-05-03 17:21:56,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254296915] [2021-05-03 17:21:56,645 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 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 [2021-05-03 17:21:56,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:21:56,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:21:56,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:21:56,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:21:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:21:56,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:21:56,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:21:56,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791136540] [2021-05-03 17:21:56,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:21:56,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:21:56,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:21:56,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:56,709 INFO L87 Difference]: Start difference. First operand 80313 states and 371656 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:21:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:21:57,987 INFO L93 Difference]: Finished difference Result 82125 states and 378603 transitions. [2021-05-03 17:21:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:21:57,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:21:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:21:58,420 INFO L225 Difference]: With dead ends: 82125 [2021-05-03 17:21:58,421 INFO L226 Difference]: Without dead ends: 82009 [2021-05-03 17:21:58,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:21:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82009 states. [2021-05-03 17:22:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82009 to 80343. [2021-05-03 17:22:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80343 states, 80342 states have (on average 4.6280525752408455) internal successors, (371827), 80342 states have internal predecessors, (371827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80343 states to 80343 states and 371827 transitions. [2021-05-03 17:22:00,907 INFO L78 Accepts]: Start accepts. Automaton has 80343 states and 371827 transitions. Word has length 25 [2021-05-03 17:22:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:00,907 INFO L480 AbstractCegarLoop]: Abstraction has 80343 states and 371827 transitions. [2021-05-03 17:22:00,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:22:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 80343 states and 371827 transitions. [2021-05-03 17:22:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:01,160 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:01,161 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:01,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:22:01,361 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1310501714, now seen corresponding path program 15 times [2021-05-03 17:22:01,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:01,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216101286] [2021-05-03 17:22:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:01,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216101286] [2021-05-03 17:22:01,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594998035] [2021-05-03 17:22:01,432 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 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 [2021-05-03 17:22:01,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:22:01,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:01,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:22:01,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:22:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:01,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:01,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:22:01,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305275215] [2021-05-03 17:22:01,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:22:01,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:01,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:22:01,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:22:01,498 INFO L87 Difference]: Start difference. First operand 80343 states and 371827 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:22:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:02,665 INFO L93 Difference]: Finished difference Result 82686 states and 381082 transitions. [2021-05-03 17:22:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:22:02,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:22:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:02,995 INFO L225 Difference]: With dead ends: 82686 [2021-05-03 17:22:02,995 INFO L226 Difference]: Without dead ends: 82590 [2021-05-03 17:22:02,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:22:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82590 states. [2021-05-03 17:22:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82590 to 80375. [2021-05-03 17:22:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80375 states, 80374 states have (on average 4.628549033269465) internal successors, (372015), 80374 states have internal predecessors, (372015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80375 states to 80375 states and 372015 transitions. [2021-05-03 17:22:06,089 INFO L78 Accepts]: Start accepts. Automaton has 80375 states and 372015 transitions. Word has length 25 [2021-05-03 17:22:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:06,089 INFO L480 AbstractCegarLoop]: Abstraction has 80375 states and 372015 transitions. [2021-05-03 17:22:06,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:22:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 80375 states and 372015 transitions. [2021-05-03 17:22:06,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:06,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:06,319 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:06,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:22:06,533 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:06,533 INFO L82 PathProgramCache]: Analyzing trace with hash -101580194, now seen corresponding path program 14 times [2021-05-03 17:22:06,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:06,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275681158] [2021-05-03 17:22:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:06,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275681158] [2021-05-03 17:22:06,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235230221] [2021-05-03 17:22:06,556 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 [2021-05-03 17:22:06,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:22:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:22:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:22:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:06,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:06,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 17:22:06,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212071365] [2021-05-03 17:22:06,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:22:06,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:06,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:22:06,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:22:06,650 INFO L87 Difference]: Start difference. First operand 80375 states and 372015 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-03 17:22:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:07,498 INFO L93 Difference]: Finished difference Result 97262 states and 447488 transitions. [2021-05-03 17:22:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:22:07,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 25 [2021-05-03 17:22:07,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:08,578 INFO L225 Difference]: With dead ends: 97262 [2021-05-03 17:22:08,579 INFO L226 Difference]: Without dead ends: 97262 [2021-05-03 17:22:08,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:22:08,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97262 states. [2021-05-03 17:22:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97262 to 86297. [2021-05-03 17:22:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86297 states, 86296 states have (on average 4.6381871697413555) internal successors, (400257), 86296 states have internal predecessors, (400257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86297 states to 86297 states and 400257 transitions. [2021-05-03 17:22:11,775 INFO L78 Accepts]: Start accepts. Automaton has 86297 states and 400257 transitions. Word has length 25 [2021-05-03 17:22:11,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:11,776 INFO L480 AbstractCegarLoop]: Abstraction has 86297 states and 400257 transitions. [2021-05-03 17:22:11,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-03 17:22:11,776 INFO L276 IsEmpty]: Start isEmpty. Operand 86297 states and 400257 transitions. [2021-05-03 17:22:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:12,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:12,567 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:12,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-03 17:22:12,781 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash 517783156, now seen corresponding path program 9 times [2021-05-03 17:22:12,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:12,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971760786] [2021-05-03 17:22:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:12,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971760786] [2021-05-03 17:22:12,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351009587] [2021-05-03 17:22:12,813 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) [2021-05-03 17:22:12,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:22:12,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:12,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:22:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:22:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:12,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:12,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-03 17:22:12,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584007106] [2021-05-03 17:22:12,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:22:12,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:12,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:22:12,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:22:12,883 INFO L87 Difference]: Start difference. First operand 86297 states and 400257 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-03 17:22:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:13,616 INFO L93 Difference]: Finished difference Result 91494 states and 422890 transitions. [2021-05-03 17:22:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:22:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-05-03 17:22:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:14,008 INFO L225 Difference]: With dead ends: 91494 [2021-05-03 17:22:14,008 INFO L226 Difference]: Without dead ends: 91347 [2021-05-03 17:22:14,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:22:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91347 states. [2021-05-03 17:22:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91347 to 89813. [2021-05-03 17:22:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89813 states, 89812 states have (on average 4.6429207678261255) internal successors, (416990), 89812 states have internal predecessors, (416990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89813 states to 89813 states and 416990 transitions. [2021-05-03 17:22:17,701 INFO L78 Accepts]: Start accepts. Automaton has 89813 states and 416990 transitions. Word has length 25 [2021-05-03 17:22:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:17,701 INFO L480 AbstractCegarLoop]: Abstraction has 89813 states and 416990 transitions. [2021-05-03 17:22:17,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-03 17:22:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 89813 states and 416990 transitions. [2021-05-03 17:22:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:17,986 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:17,986 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:18,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:22:18,188 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash -857833266, now seen corresponding path program 16 times [2021-05-03 17:22:18,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:18,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606132229] [2021-05-03 17:22:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:18,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606132229] [2021-05-03 17:22:18,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79342437] [2021-05-03 17:22:18,275 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 [2021-05-03 17:22:18,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:22:18,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:18,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:22:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:22:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:18,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:18,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:22:18,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268636092] [2021-05-03 17:22:18,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:22:18,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:18,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:22:18,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:22:18,337 INFO L87 Difference]: Start difference. First operand 89813 states and 416990 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:22:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:19,604 INFO L93 Difference]: Finished difference Result 91436 states and 423180 transitions. [2021-05-03 17:22:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:22:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:22:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:20,070 INFO L225 Difference]: With dead ends: 91436 [2021-05-03 17:22:20,070 INFO L226 Difference]: Without dead ends: 91320 [2021-05-03 17:22:20,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:22:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91320 states. [2021-05-03 17:22:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91320 to 89841. [2021-05-03 17:22:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89841 states, 89840 states have (on average 4.643165627782725) internal successors, (417142), 89840 states have internal predecessors, (417142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89841 states to 89841 states and 417142 transitions. [2021-05-03 17:22:23,382 INFO L78 Accepts]: Start accepts. Automaton has 89841 states and 417142 transitions. Word has length 25 [2021-05-03 17:22:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:23,383 INFO L480 AbstractCegarLoop]: Abstraction has 89841 states and 417142 transitions. [2021-05-03 17:22:23,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:22:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 89841 states and 417142 transitions. [2021-05-03 17:22:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:23,620 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:23,620 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:23,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:22:23,821 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:23,821 INFO L82 PathProgramCache]: Analyzing trace with hash 498908106, now seen corresponding path program 17 times [2021-05-03 17:22:23,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:23,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291423370] [2021-05-03 17:22:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:23,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291423370] [2021-05-03 17:22:23,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277828967] [2021-05-03 17:22:23,893 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 [2021-05-03 17:22:23,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:22:23,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:23,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:22:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:22:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:23,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:23,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:22:23,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339818347] [2021-05-03 17:22:23,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:22:23,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:22:23,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:22:23,964 INFO L87 Difference]: Start difference. First operand 89841 states and 417142 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:22:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:24,667 INFO L93 Difference]: Finished difference Result 92001 states and 425658 transitions. [2021-05-03 17:22:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:22:24,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:22:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:25,615 INFO L225 Difference]: With dead ends: 92001 [2021-05-03 17:22:25,615 INFO L226 Difference]: Without dead ends: 91905 [2021-05-03 17:22:25,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:22:25,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91905 states. [2021-05-03 17:22:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91905 to 89865. [2021-05-03 17:22:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89865 states, 89864 states have (on average 4.643572509570017) internal successors, (417290), 89864 states have internal predecessors, (417290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89865 states to 89865 states and 417290 transitions. [2021-05-03 17:22:28,442 INFO L78 Accepts]: Start accepts. Automaton has 89865 states and 417290 transitions. Word has length 25 [2021-05-03 17:22:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:28,442 INFO L480 AbstractCegarLoop]: Abstraction has 89865 states and 417290 transitions. [2021-05-03 17:22:28,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:22:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 89865 states and 417290 transitions. [2021-05-03 17:22:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:28,692 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:28,692 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:28,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-03 17:22:28,914 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:28,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1202930538, now seen corresponding path program 18 times [2021-05-03 17:22:28,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:28,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225843609] [2021-05-03 17:22:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:28,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225843609] [2021-05-03 17:22:28,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458782884] [2021-05-03 17:22:28,990 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 [2021-05-03 17:22:29,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:22:29,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:22:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:22:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:22:29,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:29,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:22:29,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043059325] [2021-05-03 17:22:29,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:22:29,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:29,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:22:29,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:22:29,052 INFO L87 Difference]: Start difference. First operand 89865 states and 417290 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:22:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:30,219 INFO L93 Difference]: Finished difference Result 92117 states and 425950 transitions. [2021-05-03 17:22:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:22:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:22:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:30,585 INFO L225 Difference]: With dead ends: 92117 [2021-05-03 17:22:30,585 INFO L226 Difference]: Without dead ends: 92021 [2021-05-03 17:22:30,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:22:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92021 states. [2021-05-03 17:22:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92021 to 89911. [2021-05-03 17:22:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89911 states, 89910 states have (on average 4.644099655210766) internal successors, (417551), 89910 states have internal predecessors, (417551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89911 states to 89911 states and 417551 transitions. [2021-05-03 17:22:33,794 INFO L78 Accepts]: Start accepts. Automaton has 89911 states and 417551 transitions. Word has length 25 [2021-05-03 17:22:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:33,794 INFO L480 AbstractCegarLoop]: Abstraction has 89911 states and 417551 transitions. [2021-05-03 17:22:33,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:22:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 89911 states and 417551 transitions. [2021-05-03 17:22:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:34,060 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:34,060 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:34,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:22:34,260 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1894658838, now seen corresponding path program 10 times [2021-05-03 17:22:34,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:34,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636664153] [2021-05-03 17:22:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:34,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636664153] [2021-05-03 17:22:34,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945284998] [2021-05-03 17:22:34,284 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:22:34,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:22:34,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:34,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:22:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:22:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:34,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:34,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-03 17:22:34,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102293619] [2021-05-03 17:22:34,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:22:34,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:22:34,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:22:34,377 INFO L87 Difference]: Start difference. First operand 89911 states and 417551 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-05-03 17:22:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:35,823 INFO L93 Difference]: Finished difference Result 103998 states and 474262 transitions. [2021-05-03 17:22:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:22:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-05-03 17:22:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:36,278 INFO L225 Difference]: With dead ends: 103998 [2021-05-03 17:22:36,278 INFO L226 Difference]: Without dead ends: 103896 [2021-05-03 17:22:36,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:22:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103896 states. [2021-05-03 17:22:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103896 to 89935. [2021-05-03 17:22:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89935 states, 89934 states have (on average 4.643205017012476) internal successors, (417582), 89934 states have internal predecessors, (417582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89935 states to 89935 states and 417582 transitions. [2021-05-03 17:22:39,696 INFO L78 Accepts]: Start accepts. Automaton has 89935 states and 417582 transitions. Word has length 25 [2021-05-03 17:22:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:39,697 INFO L480 AbstractCegarLoop]: Abstraction has 89935 states and 417582 transitions. [2021-05-03 17:22:39,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-05-03 17:22:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 89935 states and 417582 transitions. [2021-05-03 17:22:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:39,964 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:39,965 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:40,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-03 17:22:40,165 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1370737230, now seen corresponding path program 11 times [2021-05-03 17:22:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:40,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310238055] [2021-05-03 17:22:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310238055] [2021-05-03 17:22:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244266532] [2021-05-03 17:22:40,188 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 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 [2021-05-03 17:22:40,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:22:40,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:40,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:22:40,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:22:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:40,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:40,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 17:22:40,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603661999] [2021-05-03 17:22:40,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:22:40,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:40,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:22:40,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:22:40,268 INFO L87 Difference]: Start difference. First operand 89935 states and 417582 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-05-03 17:22:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:41,823 INFO L93 Difference]: Finished difference Result 106096 states and 486323 transitions. [2021-05-03 17:22:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:22:41,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 25 [2021-05-03 17:22:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:42,332 INFO L225 Difference]: With dead ends: 106096 [2021-05-03 17:22:42,333 INFO L226 Difference]: Without dead ends: 105946 [2021-05-03 17:22:42,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:22:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105946 states. [2021-05-03 17:22:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105946 to 98870. [2021-05-03 17:22:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98870 states, 98869 states have (on average 4.634475922685573) internal successors, (458206), 98869 states have internal predecessors, (458206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98870 states to 98870 states and 458206 transitions. [2021-05-03 17:22:45,908 INFO L78 Accepts]: Start accepts. Automaton has 98870 states and 458206 transitions. Word has length 25 [2021-05-03 17:22:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:45,909 INFO L480 AbstractCegarLoop]: Abstraction has 98870 states and 458206 transitions. [2021-05-03 17:22:45,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-05-03 17:22:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 98870 states and 458206 transitions. [2021-05-03 17:22:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:46,175 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:46,175 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:46,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 17:22:46,376 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:46,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1318988372, now seen corresponding path program 12 times [2021-05-03 17:22:46,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:46,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152361951] [2021-05-03 17:22:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:46,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152361951] [2021-05-03 17:22:46,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105028970] [2021-05-03 17:22:46,408 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 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 [2021-05-03 17:22:46,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:22:46,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:46,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:22:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:22:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:46,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:46,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 17:22:46,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737278980] [2021-05-03 17:22:46,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:22:46,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:46,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:22:46,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:22:46,488 INFO L87 Difference]: Start difference. First operand 98870 states and 458206 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-05-03 17:22:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:47,782 INFO L93 Difference]: Finished difference Result 103327 states and 476528 transitions. [2021-05-03 17:22:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:22:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 25 [2021-05-03 17:22:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:48,315 INFO L225 Difference]: With dead ends: 103327 [2021-05-03 17:22:48,315 INFO L226 Difference]: Without dead ends: 103283 [2021-05-03 17:22:48,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:22:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103283 states. [2021-05-03 17:22:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103283 to 99564. [2021-05-03 17:22:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99564 states, 99563 states have (on average 4.633588782981629) internal successors, (461334), 99563 states have internal predecessors, (461334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99564 states to 99564 states and 461334 transitions. [2021-05-03 17:22:51,880 INFO L78 Accepts]: Start accepts. Automaton has 99564 states and 461334 transitions. Word has length 25 [2021-05-03 17:22:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:51,880 INFO L480 AbstractCegarLoop]: Abstraction has 99564 states and 461334 transitions. [2021-05-03 17:22:51,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-05-03 17:22:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 99564 states and 461334 transitions. [2021-05-03 17:22:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:52,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:52,155 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:52,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 17:22:52,356 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:52,356 INFO L82 PathProgramCache]: Analyzing trace with hash 812194570, now seen corresponding path program 13 times [2021-05-03 17:22:52,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:52,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509736658] [2021-05-03 17:22:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:52,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509736658] [2021-05-03 17:22:52,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872657188] [2021-05-03 17:22:52,385 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 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 [2021-05-03 17:22:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:52,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:22:52,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:22:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:52,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:52,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 17:22:52,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614085761] [2021-05-03 17:22:52,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:22:52,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:52,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:22:52,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:22:52,470 INFO L87 Difference]: Start difference. First operand 99564 states and 461334 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:22:54,091 INFO L93 Difference]: Finished difference Result 127797 states and 581155 transitions. [2021-05-03 17:22:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 17:22:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:22:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:22:54,655 INFO L225 Difference]: With dead ends: 127797 [2021-05-03 17:22:54,655 INFO L226 Difference]: Without dead ends: 126188 [2021-05-03 17:22:54,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:22:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126188 states. [2021-05-03 17:22:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126188 to 107132. [2021-05-03 17:22:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107132 states, 107131 states have (on average 4.632711353389775) internal successors, (496307), 107131 states have internal predecessors, (496307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107132 states to 107132 states and 496307 transitions. [2021-05-03 17:22:58,455 INFO L78 Accepts]: Start accepts. Automaton has 107132 states and 496307 transitions. Word has length 25 [2021-05-03 17:22:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:22:58,456 INFO L480 AbstractCegarLoop]: Abstraction has 107132 states and 496307 transitions. [2021-05-03 17:22:58,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:22:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 107132 states and 496307 transitions. [2021-05-03 17:22:58,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:22:58,777 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:22:58,777 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:22:58,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:22:58,977 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:22:58,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:22:58,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1682717532, now seen corresponding path program 14 times [2021-05-03 17:22:58,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:22:58,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863406900] [2021-05-03 17:22:58,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:22:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:22:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:59,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863406900] [2021-05-03 17:22:59,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342892838] [2021-05-03 17:22:59,003 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 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 [2021-05-03 17:22:59,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:22:59,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:22:59,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:22:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:22:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:22:59,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:22:59,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 17:22:59,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207250947] [2021-05-03 17:22:59,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:22:59,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:22:59,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:22:59,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:22:59,078 INFO L87 Difference]: Start difference. First operand 107132 states and 496307 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-03 17:23:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:23:00,517 INFO L93 Difference]: Finished difference Result 111098 states and 512260 transitions. [2021-05-03 17:23:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:23:00,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-05-03 17:23:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:23:01,099 INFO L225 Difference]: With dead ends: 111098 [2021-05-03 17:23:01,099 INFO L226 Difference]: Without dead ends: 111014 [2021-05-03 17:23:01,100 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:23:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111014 states. [2021-05-03 17:23:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111014 to 107176. [2021-05-03 17:23:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107176 states, 107175 states have (on average 4.6319944016794965) internal successors, (496434), 107175 states have internal predecessors, (496434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:23:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107176 states to 107176 states and 496434 transitions. [2021-05-03 17:23:05,025 INFO L78 Accepts]: Start accepts. Automaton has 107176 states and 496434 transitions. Word has length 25 [2021-05-03 17:23:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:23:05,025 INFO L480 AbstractCegarLoop]: Abstraction has 107176 states and 496434 transitions. [2021-05-03 17:23:05,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-03 17:23:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 107176 states and 496434 transitions. [2021-05-03 17:23:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:23:05,383 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:23:05,383 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:23:05,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 17:23:05,583 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:23:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:23:05,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1176441750, now seen corresponding path program 7 times [2021-05-03 17:23:05,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:23:05,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866345850] [2021-05-03 17:23:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:23:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:23:05,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866345850] [2021-05-03 17:23:05,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408609976] [2021-05-03 17:23:05,673 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 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 [2021-05-03 17:23:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:05,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:23:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:23:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:23:05,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:23:05,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:23:05,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635545760] [2021-05-03 17:23:05,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:23:05,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:23:05,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:23:05,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:05,774 INFO L87 Difference]: Start difference. First operand 107176 states and 496434 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:23:07,816 INFO L93 Difference]: Finished difference Result 109645 states and 506156 transitions. [2021-05-03 17:23:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:23:07,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:23:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:23:08,701 INFO L225 Difference]: With dead ends: 109645 [2021-05-03 17:23:08,702 INFO L226 Difference]: Without dead ends: 109545 [2021-05-03 17:23:08,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109545 states. [2021-05-03 17:23:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109545 to 107247. [2021-05-03 17:23:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107247 states, 107246 states have (on average 4.632191410402252) internal successors, (496784), 107246 states have internal predecessors, (496784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:23:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107247 states to 107247 states and 496784 transitions. [2021-05-03 17:23:13,134 INFO L78 Accepts]: Start accepts. Automaton has 107247 states and 496784 transitions. Word has length 25 [2021-05-03 17:23:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:23:13,134 INFO L480 AbstractCegarLoop]: Abstraction has 107247 states and 496784 transitions. [2021-05-03 17:23:13,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 107247 states and 496784 transitions. [2021-05-03 17:23:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:23:13,490 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:23:13,490 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:23:13,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:23:13,691 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:23:13,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:23:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1470680270, now seen corresponding path program 8 times [2021-05-03 17:23:13,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:23:13,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117334496] [2021-05-03 17:23:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:23:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:23:13,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117334496] [2021-05-03 17:23:13,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547391084] [2021-05-03 17:23:13,743 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 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 [2021-05-03 17:23:13,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:23:13,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:23:13,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:23:13,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:23:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:23:13,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:23:13,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:23:13,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638093102] [2021-05-03 17:23:13,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:23:13,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:23:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:23:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:13,829 INFO L87 Difference]: Start difference. First operand 107247 states and 496784 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:23:15,489 INFO L93 Difference]: Finished difference Result 109935 states and 507541 transitions. [2021-05-03 17:23:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:23:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:23:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:23:16,143 INFO L225 Difference]: With dead ends: 109935 [2021-05-03 17:23:16,144 INFO L226 Difference]: Without dead ends: 109835 [2021-05-03 17:23:16,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109835 states. [2021-05-03 17:23:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109835 to 107294. [2021-05-03 17:23:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107294 states, 107293 states have (on average 4.6324830138033235) internal successors, (497033), 107293 states have internal predecessors, (497033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:23:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107294 states to 107294 states and 497033 transitions. [2021-05-03 17:23:20,506 INFO L78 Accepts]: Start accepts. Automaton has 107294 states and 497033 transitions. Word has length 25 [2021-05-03 17:23:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:23:20,507 INFO L480 AbstractCegarLoop]: Abstraction has 107294 states and 497033 transitions. [2021-05-03 17:23:20,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 107294 states and 497033 transitions. [2021-05-03 17:23:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:23:20,872 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:23:20,872 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:23:21,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:23:21,089 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:23:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:23:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1996714358, now seen corresponding path program 9 times [2021-05-03 17:23:21,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:23:21,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841510355] [2021-05-03 17:23:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:23:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:23:21,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841510355] [2021-05-03 17:23:21,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928491540] [2021-05-03 17:23:21,157 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 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 [2021-05-03 17:23:21,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:23:21,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:23:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:23:21,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:23:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:23:21,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:23:21,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:23:21,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113702686] [2021-05-03 17:23:21,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:23:21,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:23:21,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:23:21,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:21,257 INFO L87 Difference]: Start difference. First operand 107294 states and 497033 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:23:22,784 INFO L93 Difference]: Finished difference Result 108174 states and 500464 transitions. [2021-05-03 17:23:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:23:22,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:23:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:23:23,301 INFO L225 Difference]: With dead ends: 108174 [2021-05-03 17:23:23,302 INFO L226 Difference]: Without dead ends: 108098 [2021-05-03 17:23:23,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108098 states. [2021-05-03 17:23:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108098 to 107338. [2021-05-03 17:23:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107338 states, 107337 states have (on average 4.632307591976671) internal successors, (497218), 107337 states have internal predecessors, (497218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:23:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107338 states to 107338 states and 497218 transitions. [2021-05-03 17:23:27,442 INFO L78 Accepts]: Start accepts. Automaton has 107338 states and 497218 transitions. Word has length 25 [2021-05-03 17:23:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:23:27,442 INFO L480 AbstractCegarLoop]: Abstraction has 107338 states and 497218 transitions. [2021-05-03 17:23:27,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 107338 states and 497218 transitions. [2021-05-03 17:23:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:23:27,788 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:23:27,788 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:23:27,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-03 17:23:27,990 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:23:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:23:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash -247614478, now seen corresponding path program 10 times [2021-05-03 17:23:27,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:23:27,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471188101] [2021-05-03 17:23:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:23:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:23:28,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471188101] [2021-05-03 17:23:28,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875373711] [2021-05-03 17:23:28,068 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 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 [2021-05-03 17:23:28,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:23:28,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:23:28,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:23:28,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:23:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:23:28,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:23:28,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:23:28,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297301003] [2021-05-03 17:23:28,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:23:28,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:23:28,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:23:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:28,141 INFO L87 Difference]: Start difference. First operand 107338 states and 497218 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:29,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:23:29,510 INFO L93 Difference]: Finished difference Result 108674 states and 502502 transitions. [2021-05-03 17:23:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:23:29,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:23:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:23:30,045 INFO L225 Difference]: With dead ends: 108674 [2021-05-03 17:23:30,045 INFO L226 Difference]: Without dead ends: 108586 [2021-05-03 17:23:30,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108586 states. [2021-05-03 17:23:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108586 to 107368. [2021-05-03 17:23:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107368 states, 107367 states have (on average 4.632466214013617) internal successors, (497374), 107367 states have internal predecessors, (497374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:23:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107368 states to 107368 states and 497374 transitions. [2021-05-03 17:23:34,028 INFO L78 Accepts]: Start accepts. Automaton has 107368 states and 497374 transitions. Word has length 25 [2021-05-03 17:23:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:23:34,028 INFO L480 AbstractCegarLoop]: Abstraction has 107368 states and 497374 transitions. [2021-05-03 17:23:34,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 107368 states and 497374 transitions. [2021-05-03 17:23:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:23:34,383 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:23:34,383 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:23:34,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:23:34,585 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:23:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:23:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1683892410, now seen corresponding path program 11 times [2021-05-03 17:23:34,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:23:34,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93809071] [2021-05-03 17:23:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:23:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:23:34,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93809071] [2021-05-03 17:23:34,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151350840] [2021-05-03 17:23:34,657 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 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 [2021-05-03 17:23:34,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:23:34,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:23:34,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:23:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:23:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:23:34,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:23:34,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:23:34,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334529488] [2021-05-03 17:23:34,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:23:34,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:23:34,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:23:34,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:34,715 INFO L87 Difference]: Start difference. First operand 107368 states and 497374 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:23:36,380 INFO L93 Difference]: Finished difference Result 109338 states and 505111 transitions. [2021-05-03 17:23:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:23:36,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:23:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:23:37,039 INFO L225 Difference]: With dead ends: 109338 [2021-05-03 17:23:37,040 INFO L226 Difference]: Without dead ends: 109238 [2021-05-03 17:23:37,040 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109238 states. [2021-05-03 17:23:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109238 to 107385. [2021-05-03 17:23:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107385 states, 107384 states have (on average 4.63280376964911) internal successors, (497489), 107384 states have internal predecessors, (497489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:23:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107385 states to 107385 states and 497489 transitions. [2021-05-03 17:23:41,597 INFO L78 Accepts]: Start accepts. Automaton has 107385 states and 497489 transitions. Word has length 25 [2021-05-03 17:23:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:23:41,597 INFO L480 AbstractCegarLoop]: Abstraction has 107385 states and 497489 transitions. [2021-05-03 17:23:41,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 107385 states and 497489 transitions. [2021-05-03 17:23:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:23:42,603 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:23:42,603 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:23:42,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:23:42,804 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:23:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:23:42,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1492192234, now seen corresponding path program 17 times [2021-05-03 17:23:42,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:23:42,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052398757] [2021-05-03 17:23:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:23:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:23:42,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052398757] [2021-05-03 17:23:42,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380899795] [2021-05-03 17:23:42,826 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 [2021-05-03 17:23:42,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:23:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:23:42,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:23:42,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:23:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:23:42,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:23:42,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-03 17:23:42,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791342035] [2021-05-03 17:23:42,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:23:42,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:23:42,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:23:42,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:23:42,904 INFO L87 Difference]: Start difference. First operand 107385 states and 497489 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-05-03 17:23:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:23:44,137 INFO L93 Difference]: Finished difference Result 128991 states and 589145 transitions. [2021-05-03 17:23:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:23:44,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-05-03 17:23:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:23:44,891 INFO L225 Difference]: With dead ends: 128991 [2021-05-03 17:23:44,891 INFO L226 Difference]: Without dead ends: 128991 [2021-05-03 17:23:44,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:23:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128991 states. [2021-05-03 17:23:49,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128991 to 111610. [2021-05-03 17:23:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111610 states, 111609 states have (on average 4.633667535772204) internal successors, (517159), 111609 states have internal predecessors, (517159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:23:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111610 states to 111610 states and 517159 transitions. [2021-05-03 17:23:50,219 INFO L78 Accepts]: Start accepts. Automaton has 111610 states and 517159 transitions. Word has length 25 [2021-05-03 17:23:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:23:50,219 INFO L480 AbstractCegarLoop]: Abstraction has 111610 states and 517159 transitions. [2021-05-03 17:23:50,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-05-03 17:23:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 111610 states and 517159 transitions. [2021-05-03 17:23:50,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:23:50,546 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:23:50,546 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:23:50,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:23:50,761 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:23:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:23:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1850358678, now seen corresponding path program 12 times [2021-05-03 17:23:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:23:50,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882355368] [2021-05-03 17:23:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:23:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:23:50,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882355368] [2021-05-03 17:23:50,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990428286] [2021-05-03 17:23:50,825 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 [2021-05-03 17:23:50,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:23:50,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:23:50,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:23:50,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:23:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:23:50,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:23:50,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:23:50,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630170827] [2021-05-03 17:23:50,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:23:50,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:23:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:23:50,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:50,894 INFO L87 Difference]: Start difference. First operand 111610 states and 517159 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:23:52,410 INFO L93 Difference]: Finished difference Result 114140 states and 527155 transitions. [2021-05-03 17:23:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:23:52,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:23:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:23:53,016 INFO L225 Difference]: With dead ends: 114140 [2021-05-03 17:23:53,016 INFO L226 Difference]: Without dead ends: 114040 [2021-05-03 17:23:53,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114040 states. [2021-05-03 17:23:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114040 to 111636. [2021-05-03 17:23:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111636 states, 111635 states have (on average 4.634146996909571) internal successors, (517333), 111635 states have internal predecessors, (517333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:23:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111636 states to 111636 states and 517333 transitions. [2021-05-03 17:23:57,421 INFO L78 Accepts]: Start accepts. Automaton has 111636 states and 517333 transitions. Word has length 25 [2021-05-03 17:23:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:23:57,421 INFO L480 AbstractCegarLoop]: Abstraction has 111636 states and 517333 transitions. [2021-05-03 17:23:57,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 111636 states and 517333 transitions. [2021-05-03 17:23:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:23:57,773 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:23:57,773 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:23:57,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:23:57,973 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:23:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:23:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1617035950, now seen corresponding path program 13 times [2021-05-03 17:23:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:23:57,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745551990] [2021-05-03 17:23:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:23:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:23:58,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745551990] [2021-05-03 17:23:58,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531463423] [2021-05-03 17:23:58,034 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 [2021-05-03 17:23:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:23:58,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:23:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:23:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:23:58,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:23:58,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:23:58,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518499494] [2021-05-03 17:23:58,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:23:58,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:23:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:23:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:23:58,089 INFO L87 Difference]: Start difference. First operand 111636 states and 517333 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:23:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:23:59,768 INFO L93 Difference]: Finished difference Result 114254 states and 527699 transitions. [2021-05-03 17:23:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:23:59,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:23:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:24:00,464 INFO L225 Difference]: With dead ends: 114254 [2021-05-03 17:24:00,464 INFO L226 Difference]: Without dead ends: 114178 [2021-05-03 17:24:00,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:00,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114178 states. [2021-05-03 17:24:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114178 to 111663. [2021-05-03 17:24:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111663 states, 111662 states have (on average 4.6343697945585784) internal successors, (517483), 111662 states have internal predecessors, (517483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:24:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111663 states to 111663 states and 517483 transitions. [2021-05-03 17:24:04,976 INFO L78 Accepts]: Start accepts. Automaton has 111663 states and 517483 transitions. Word has length 25 [2021-05-03 17:24:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:24:04,976 INFO L480 AbstractCegarLoop]: Abstraction has 111663 states and 517483 transitions. [2021-05-03 17:24:04,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 111663 states and 517483 transitions. [2021-05-03 17:24:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:24:06,048 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:24:06,064 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:24:06,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 17:24:06,281 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:24:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:24:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 132063930, now seen corresponding path program 14 times [2021-05-03 17:24:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:24:06,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094147119] [2021-05-03 17:24:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:24:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:24:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:06,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094147119] [2021-05-03 17:24:06,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432289527] [2021-05-03 17:24:06,349 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 [2021-05-03 17:24:06,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:24:06,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:24:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:24:06,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:24:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:06,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:24:06,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:24:06,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149187045] [2021-05-03 17:24:06,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:24:06,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:24:06,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:24:06,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:06,424 INFO L87 Difference]: Start difference. First operand 111663 states and 517483 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:07,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:24:07,333 INFO L93 Difference]: Finished difference Result 113450 states and 524443 transitions. [2021-05-03 17:24:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:24:07,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:24:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:24:07,840 INFO L225 Difference]: With dead ends: 113450 [2021-05-03 17:24:07,840 INFO L226 Difference]: Without dead ends: 113362 [2021-05-03 17:24:07,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113362 states. [2021-05-03 17:24:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113362 to 111672. [2021-05-03 17:24:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111672 states, 111671 states have (on average 4.6346141791512565) internal successors, (517552), 111671 states have internal predecessors, (517552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:24:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111672 states to 111672 states and 517552 transitions. [2021-05-03 17:24:12,745 INFO L78 Accepts]: Start accepts. Automaton has 111672 states and 517552 transitions. Word has length 25 [2021-05-03 17:24:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:24:12,745 INFO L480 AbstractCegarLoop]: Abstraction has 111672 states and 517552 transitions. [2021-05-03 17:24:12,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 111672 states and 517552 transitions. [2021-05-03 17:24:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:24:13,106 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:24:13,106 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:24:13,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-03 17:24:13,321 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:24:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:24:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1826075754, now seen corresponding path program 15 times [2021-05-03 17:24:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:24:13,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334182098] [2021-05-03 17:24:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:24:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:24:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:13,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334182098] [2021-05-03 17:24:13,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530390247] [2021-05-03 17:24:13,399 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 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 [2021-05-03 17:24:13,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:24:13,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:24:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:24:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:24:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:13,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:24:13,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:24:13,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205798885] [2021-05-03 17:24:13,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:24:13,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:24:13,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:24:13,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:13,531 INFO L87 Difference]: Start difference. First operand 111672 states and 517552 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:24:15,161 INFO L93 Difference]: Finished difference Result 114189 states and 527397 transitions. [2021-05-03 17:24:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:24:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:24:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:24:15,769 INFO L225 Difference]: With dead ends: 114189 [2021-05-03 17:24:15,769 INFO L226 Difference]: Without dead ends: 114113 [2021-05-03 17:24:15,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114113 states. [2021-05-03 17:24:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114113 to 111714. [2021-05-03 17:24:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111714 states, 111713 states have (on average 4.635029047648886) internal successors, (517793), 111713 states have internal predecessors, (517793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:24:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111714 states to 111714 states and 517793 transitions. [2021-05-03 17:24:20,546 INFO L78 Accepts]: Start accepts. Automaton has 111714 states and 517793 transitions. Word has length 25 [2021-05-03 17:24:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:24:20,546 INFO L480 AbstractCegarLoop]: Abstraction has 111714 states and 517793 transitions. [2021-05-03 17:24:20,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 111714 states and 517793 transitions. [2021-05-03 17:24:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:24:21,602 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:24:21,602 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:24:21,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 17:24:21,829 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:24:21,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:24:21,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159402, now seen corresponding path program 16 times [2021-05-03 17:24:21,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:24:21,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360897329] [2021-05-03 17:24:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:24:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:24:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:21,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360897329] [2021-05-03 17:24:21,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182764348] [2021-05-03 17:24:21,901 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 [2021-05-03 17:24:21,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:24:21,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:24:21,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:24:21,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:24:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:21,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:24:21,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:24:21,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150114523] [2021-05-03 17:24:21,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:24:21,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:24:21,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:24:21,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:21,972 INFO L87 Difference]: Start difference. First operand 111714 states and 517793 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:24:22,946 INFO L93 Difference]: Finished difference Result 113867 states and 526305 transitions. [2021-05-03 17:24:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:24:22,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:24:22,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:24:23,467 INFO L225 Difference]: With dead ends: 113867 [2021-05-03 17:24:23,468 INFO L226 Difference]: Without dead ends: 113791 [2021-05-03 17:24:23,468 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113791 states. [2021-05-03 17:24:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113791 to 111736. [2021-05-03 17:24:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111736 states, 111735 states have (on average 4.635342551572918) internal successors, (517930), 111735 states have internal predecessors, (517930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:24:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111736 states to 111736 states and 517930 transitions. [2021-05-03 17:24:28,325 INFO L78 Accepts]: Start accepts. Automaton has 111736 states and 517930 transitions. Word has length 25 [2021-05-03 17:24:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:24:28,325 INFO L480 AbstractCegarLoop]: Abstraction has 111736 states and 517930 transitions. [2021-05-03 17:24:28,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 111736 states and 517930 transitions. [2021-05-03 17:24:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:24:28,745 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:24:28,745 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:24:28,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:24:28,946 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:24:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:24:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1420708014, now seen corresponding path program 17 times [2021-05-03 17:24:28,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:24:28,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089337271] [2021-05-03 17:24:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:24:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:24:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089337271] [2021-05-03 17:24:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015537473] [2021-05-03 17:24:29,006 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 [2021-05-03 17:24:29,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:24:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:24:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:24:29,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:24:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:29,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:24:29,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:24:29,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667658926] [2021-05-03 17:24:29,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:24:29,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:24:29,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:24:29,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:29,087 INFO L87 Difference]: Start difference. First operand 111736 states and 517930 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:24:30,189 INFO L93 Difference]: Finished difference Result 113238 states and 523749 transitions. [2021-05-03 17:24:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:24:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:24:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:24:31,517 INFO L225 Difference]: With dead ends: 113238 [2021-05-03 17:24:31,517 INFO L226 Difference]: Without dead ends: 113150 [2021-05-03 17:24:31,517 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113150 states. [2021-05-03 17:24:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113150 to 111747. [2021-05-03 17:24:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111747 states, 111746 states have (on average 4.63561111807134) internal successors, (518011), 111746 states have internal predecessors, (518011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:24:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111747 states to 111747 states and 518011 transitions. [2021-05-03 17:24:35,572 INFO L78 Accepts]: Start accepts. Automaton has 111747 states and 518011 transitions. Word has length 25 [2021-05-03 17:24:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:24:35,572 INFO L480 AbstractCegarLoop]: Abstraction has 111747 states and 518011 transitions. [2021-05-03 17:24:35,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 111747 states and 518011 transitions. [2021-05-03 17:24:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:24:36,009 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:24:36,010 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:24:36,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 17:24:36,210 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:24:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:24:36,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1658453014, now seen corresponding path program 18 times [2021-05-03 17:24:36,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:24:36,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266682939] [2021-05-03 17:24:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:24:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:24:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:24:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266682939] [2021-05-03 17:24:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778013944] [2021-05-03 17:24:36,240 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 [2021-05-03 17:24:36,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:24:36,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:24:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:24:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:24:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:24:36,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:24:36,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 17:24:36,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835556653] [2021-05-03 17:24:36,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:24:36,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:24:36,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:24:36,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:24:36,343 INFO L87 Difference]: Start difference. First operand 111747 states and 518011 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-05-03 17:24:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:24:38,871 INFO L93 Difference]: Finished difference Result 177468 states and 809581 transitions. [2021-05-03 17:24:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:24:38,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 25 [2021-05-03 17:24:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:24:39,957 INFO L225 Difference]: With dead ends: 177468 [2021-05-03 17:24:39,958 INFO L226 Difference]: Without dead ends: 176203 [2021-05-03 17:24:39,958 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:24:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176203 states. [2021-05-03 17:24:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176203 to 133717. [2021-05-03 17:24:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133717 states, 133716 states have (on average 4.641905231984206) internal successors, (620697), 133716 states have internal predecessors, (620697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:24:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133717 states to 133717 states and 620697 transitions. [2021-05-03 17:24:46,166 INFO L78 Accepts]: Start accepts. Automaton has 133717 states and 620697 transitions. Word has length 25 [2021-05-03 17:24:46,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:24:46,166 INFO L480 AbstractCegarLoop]: Abstraction has 133717 states and 620697 transitions. [2021-05-03 17:24:46,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-05-03 17:24:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 133717 states and 620697 transitions. [2021-05-03 17:24:46,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:24:46,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:24:46,615 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:24:46,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-03 17:24:46,829 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:24:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:24:46,829 INFO L82 PathProgramCache]: Analyzing trace with hash 208727758, now seen corresponding path program 19 times [2021-05-03 17:24:46,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:24:46,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205599264] [2021-05-03 17:24:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:24:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:24:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:24:46,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205599264] [2021-05-03 17:24:46,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:24:46,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 17:24:46,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232916733] [2021-05-03 17:24:46,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 17:24:46,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:24:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 17:24:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:24:46,854 INFO L87 Difference]: Start difference. First operand 133717 states and 620697 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-03 17:24:48,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:24:48,659 INFO L93 Difference]: Finished difference Result 148218 states and 682182 transitions. [2021-05-03 17:24:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:24:48,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 25 [2021-05-03 17:24:48,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:24:49,403 INFO L225 Difference]: With dead ends: 148218 [2021-05-03 17:24:49,403 INFO L226 Difference]: Without dead ends: 148218 [2021-05-03 17:24:49,403 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:24:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148218 states. [2021-05-03 17:24:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148218 to 133829. [2021-05-03 17:24:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133829 states, 133828 states have (on average 4.642107780135697) internal successors, (621244), 133828 states have internal predecessors, (621244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:24:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133829 states to 133829 states and 621244 transitions. [2021-05-03 17:24:54,765 INFO L78 Accepts]: Start accepts. Automaton has 133829 states and 621244 transitions. Word has length 25 [2021-05-03 17:24:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:24:54,765 INFO L480 AbstractCegarLoop]: Abstraction has 133829 states and 621244 transitions. [2021-05-03 17:24:54,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-03 17:24:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 133829 states and 621244 transitions. [2021-05-03 17:24:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:24:55,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:24:55,217 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:24:55,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-03 17:24:55,217 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:24:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:24:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 537875814, now seen corresponding path program 18 times [2021-05-03 17:24:55,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:24:55,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112602178] [2021-05-03 17:24:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:24:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:24:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112602178] [2021-05-03 17:24:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691120063] [2021-05-03 17:24:55,339 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 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 [2021-05-03 17:24:55,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:24:55,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:24:55,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:24:55,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:24:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:24:55,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:24:55,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:24:55,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609301174] [2021-05-03 17:24:55,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:24:55,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:24:55,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:24:55,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:55,413 INFO L87 Difference]: Start difference. First operand 133829 states and 621244 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:24:57,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:24:57,524 INFO L93 Difference]: Finished difference Result 136117 states and 630322 transitions. [2021-05-03 17:24:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:24:57,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:24:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:24:58,334 INFO L225 Difference]: With dead ends: 136117 [2021-05-03 17:24:58,335 INFO L226 Difference]: Without dead ends: 136017 [2021-05-03 17:24:58,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:24:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136017 states. [2021-05-03 17:25:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136017 to 133843. [2021-05-03 17:25:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133843 states, 133842 states have (on average 4.642272231437068) internal successors, (621331), 133842 states have internal predecessors, (621331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:25:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133843 states to 133843 states and 621331 transitions. [2021-05-03 17:25:04,061 INFO L78 Accepts]: Start accepts. Automaton has 133843 states and 621331 transitions. Word has length 25 [2021-05-03 17:25:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:25:04,062 INFO L480 AbstractCegarLoop]: Abstraction has 133843 states and 621331 transitions. [2021-05-03 17:25:04,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:25:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 133843 states and 621331 transitions. [2021-05-03 17:25:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:25:04,619 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:25:04,619 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:25:04,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:25:04,820 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:25:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:25:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1365448482, now seen corresponding path program 19 times [2021-05-03 17:25:04,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:25:04,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086909684] [2021-05-03 17:25:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:25:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:25:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:25:04,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086909684] [2021-05-03 17:25:04,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029947325] [2021-05-03 17:25:04,957 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 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 [2021-05-03 17:25:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:25:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:25:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:25:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:25:05,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:25:05,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:25:05,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921956428] [2021-05-03 17:25:05,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:25:05,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:25:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:25:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:25:05,052 INFO L87 Difference]: Start difference. First operand 133843 states and 621331 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:25:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:25:06,827 INFO L93 Difference]: Finished difference Result 134882 states and 625349 transitions. [2021-05-03 17:25:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:25:06,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:25:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:25:07,576 INFO L225 Difference]: With dead ends: 134882 [2021-05-03 17:25:07,576 INFO L226 Difference]: Without dead ends: 134806 [2021-05-03 17:25:07,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:25:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134806 states. [2021-05-03 17:25:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134806 to 133853. [2021-05-03 17:25:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133853 states, 133852 states have (on average 4.642298957057048) internal successors, (621381), 133852 states have internal predecessors, (621381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:25:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133853 states to 133853 states and 621381 transitions. [2021-05-03 17:25:13,167 INFO L78 Accepts]: Start accepts. Automaton has 133853 states and 621381 transitions. Word has length 25 [2021-05-03 17:25:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:25:13,168 INFO L480 AbstractCegarLoop]: Abstraction has 133853 states and 621381 transitions. [2021-05-03 17:25:13,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:25:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 133853 states and 621381 transitions. [2021-05-03 17:25:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:25:13,594 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:25:13,594 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:25:13,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:25:13,794 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:25:13,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:25:13,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1180418934, now seen corresponding path program 20 times [2021-05-03 17:25:13,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:25:13,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164275678] [2021-05-03 17:25:13,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:25:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:25:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:25:13,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164275678] [2021-05-03 17:25:13,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087191177] [2021-05-03 17:25:13,881 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 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 [2021-05-03 17:25:13,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:25:13,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:25:13,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:25:13,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:25:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:25:13,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:25:13,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:25:13,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121094553] [2021-05-03 17:25:13,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:25:13,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:25:13,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:25:13,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:25:13,952 INFO L87 Difference]: Start difference. First operand 133853 states and 621381 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:25:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:25:15,826 INFO L93 Difference]: Finished difference Result 135171 states and 626564 transitions. [2021-05-03 17:25:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:25:15,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:25:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:25:16,544 INFO L225 Difference]: With dead ends: 135171 [2021-05-03 17:25:16,544 INFO L226 Difference]: Without dead ends: 135083 [2021-05-03 17:25:16,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:25:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135083 states. [2021-05-03 17:25:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135083 to 133857. [2021-05-03 17:25:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133857 states, 133856 states have (on average 4.642414236194119) internal successors, (621415), 133856 states have internal predecessors, (621415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:25:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133857 states to 133857 states and 621415 transitions. [2021-05-03 17:25:20,881 INFO L78 Accepts]: Start accepts. Automaton has 133857 states and 621415 transitions. Word has length 25 [2021-05-03 17:25:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:25:20,881 INFO L480 AbstractCegarLoop]: Abstraction has 133857 states and 621415 transitions. [2021-05-03 17:25:20,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:25:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 133857 states and 621415 transitions. [2021-05-03 17:25:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:25:21,891 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:25:21,891 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:25:22,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:25:22,092 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:25:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:25:22,092 INFO L82 PathProgramCache]: Analyzing trace with hash 751087954, now seen corresponding path program 21 times [2021-05-03 17:25:22,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:25:22,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073573409] [2021-05-03 17:25:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:25:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:25:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:25:22,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073573409] [2021-05-03 17:25:22,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972668605] [2021-05-03 17:25:22,133 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 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 [2021-05-03 17:25:22,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:25:22,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:25:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:25:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:25:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:25:22,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:25:22,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-03 17:25:22,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698222391] [2021-05-03 17:25:22,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:25:22,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:25:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:25:22,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:25:22,208 INFO L87 Difference]: Start difference. First operand 133857 states and 621415 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:25:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:25:23,413 INFO L93 Difference]: Finished difference Result 135454 states and 627652 transitions. [2021-05-03 17:25:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:25:23,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-05-03 17:25:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:25:24,796 INFO L225 Difference]: With dead ends: 135454 [2021-05-03 17:25:24,797 INFO L226 Difference]: Without dead ends: 135354 [2021-05-03 17:25:24,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:25:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135354 states. [2021-05-03 17:25:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135354 to 133859. [2021-05-03 17:25:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133859 states, 133858 states have (on average 4.642673579464806) internal successors, (621459), 133858 states have internal predecessors, (621459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:25:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133859 states to 133859 states and 621459 transitions. [2021-05-03 17:25:29,479 INFO L78 Accepts]: Start accepts. Automaton has 133859 states and 621459 transitions. Word has length 25 [2021-05-03 17:25:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:25:29,479 INFO L480 AbstractCegarLoop]: Abstraction has 133859 states and 621459 transitions. [2021-05-03 17:25:29,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-03 17:25:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 133859 states and 621459 transitions. [2021-05-03 17:25:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:25:29,856 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:25:29,856 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:25:30,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-03 17:25:30,070 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:25:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:25:30,070 INFO L82 PathProgramCache]: Analyzing trace with hash 882333870, now seen corresponding path program 19 times [2021-05-03 17:25:30,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:25:30,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407181784] [2021-05-03 17:25:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:25:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:25:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:25:30,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407181784] [2021-05-03 17:25:30,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860620651] [2021-05-03 17:25:30,102 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 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 [2021-05-03 17:25:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:25:30,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:25:30,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:25:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:25:30,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:25:30,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:25:30,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121543761] [2021-05-03 17:25:30,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:25:30,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:25:30,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:25:30,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:25:30,182 INFO L87 Difference]: Start difference. First operand 133859 states and 621459 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-03 17:25:32,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:25:32,439 INFO L93 Difference]: Finished difference Result 190154 states and 876059 transitions. [2021-05-03 17:25:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 17:25:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 27 [2021-05-03 17:25:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:25:34,024 INFO L225 Difference]: With dead ends: 190154 [2021-05-03 17:25:34,024 INFO L226 Difference]: Without dead ends: 189001 [2021-05-03 17:25:34,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:25:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189001 states. [2021-05-03 17:25:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189001 to 167663. [2021-05-03 17:25:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167663 states, 167662 states have (on average 4.639912442891054) internal successors, (777937), 167662 states have internal predecessors, (777937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:25:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167663 states to 167663 states and 777937 transitions. [2021-05-03 17:25:40,513 INFO L78 Accepts]: Start accepts. Automaton has 167663 states and 777937 transitions. Word has length 27 [2021-05-03 17:25:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:25:40,513 INFO L480 AbstractCegarLoop]: Abstraction has 167663 states and 777937 transitions. [2021-05-03 17:25:40,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-03 17:25:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 167663 states and 777937 transitions. [2021-05-03 17:25:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:25:41,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:25:41,660 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:25:41,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-03 17:25:41,877 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:25:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:25:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 864085738, now seen corresponding path program 15 times [2021-05-03 17:25:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:25:41,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511553553] [2021-05-03 17:25:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:25:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:25:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:25:41,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511553553] [2021-05-03 17:25:41,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201294999] [2021-05-03 17:25:41,905 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 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 [2021-05-03 17:25:41,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:25:41,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:25:41,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:25:41,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:25:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:25:42,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:25:42,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:25:42,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556304364] [2021-05-03 17:25:42,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:25:42,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:25:42,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:25:42,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:25:42,002 INFO L87 Difference]: Start difference. First operand 167663 states and 777937 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-03 17:25:44,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:25:44,187 INFO L93 Difference]: Finished difference Result 197247 states and 909451 transitions. [2021-05-03 17:25:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 17:25:44,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 27 [2021-05-03 17:25:44,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:25:45,169 INFO L225 Difference]: With dead ends: 197247 [2021-05-03 17:25:45,169 INFO L226 Difference]: Without dead ends: 197005 [2021-05-03 17:25:45,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:25:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197005 states. [2021-05-03 17:25:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197005 to 168802. [2021-05-03 17:25:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168802 states, 168801 states have (on average 4.642656145401983) internal successors, (783685), 168801 states have internal predecessors, (783685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:25:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168802 states to 168802 states and 783685 transitions. [2021-05-03 17:25:51,649 INFO L78 Accepts]: Start accepts. Automaton has 168802 states and 783685 transitions. Word has length 27 [2021-05-03 17:25:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:25:51,649 INFO L480 AbstractCegarLoop]: Abstraction has 168802 states and 783685 transitions. [2021-05-03 17:25:51,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-03 17:25:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 168802 states and 783685 transitions. [2021-05-03 17:25:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:25:52,897 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:25:52,897 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:25:53,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-03 17:25:53,097 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:25:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:25:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1674557870, now seen corresponding path program 9 times [2021-05-03 17:25:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:25:53,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917203078] [2021-05-03 17:25:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:25:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:25:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:25:53,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917203078] [2021-05-03 17:25:53,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794246483] [2021-05-03 17:25:53,166 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 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 [2021-05-03 17:25:53,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:25:53,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:25:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:25:53,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:25:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:25:53,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:25:53,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-03 17:25:53,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599653164] [2021-05-03 17:25:53,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:25:53,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:25:53,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:25:53,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:25:53,243 INFO L87 Difference]: Start difference. First operand 168802 states and 783685 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:25:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:25:55,461 INFO L93 Difference]: Finished difference Result 170680 states and 790805 transitions. [2021-05-03 17:25:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:25:55,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:25:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:25:56,329 INFO L225 Difference]: With dead ends: 170680 [2021-05-03 17:25:56,330 INFO L226 Difference]: Without dead ends: 170598 [2021-05-03 17:25:56,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:25:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170598 states. [2021-05-03 17:26:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170598 to 168961. [2021-05-03 17:26:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168961 states, 168960 states have (on average 4.642459753787879) internal successors, (784390), 168960 states have internal predecessors, (784390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168961 states to 168961 states and 784390 transitions. [2021-05-03 17:26:02,399 INFO L78 Accepts]: Start accepts. Automaton has 168961 states and 784390 transitions. Word has length 27 [2021-05-03 17:26:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:26:02,399 INFO L480 AbstractCegarLoop]: Abstraction has 168961 states and 784390 transitions. [2021-05-03 17:26:02,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:02,399 INFO L276 IsEmpty]: Start isEmpty. Operand 168961 states and 784390 transitions. [2021-05-03 17:26:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:26:03,549 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:26:03,549 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:26:03,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 17:26:03,757 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:26:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:26:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash 871441812, now seen corresponding path program 10 times [2021-05-03 17:26:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:26:03,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699777492] [2021-05-03 17:26:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:26:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:26:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:26:03,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699777492] [2021-05-03 17:26:03,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968689895] [2021-05-03 17:26:03,872 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 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 [2021-05-03 17:26:03,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:26:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:26:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:26:03,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:26:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:26:03,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:26:03,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-03 17:26:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877170458] [2021-05-03 17:26:03,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:26:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:26:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:26:03,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:26:03,975 INFO L87 Difference]: Start difference. First operand 168961 states and 784390 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:26:05,977 INFO L93 Difference]: Finished difference Result 169759 states and 787360 transitions. [2021-05-03 17:26:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:26:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:26:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:26:07,161 INFO L225 Difference]: With dead ends: 169759 [2021-05-03 17:26:07,161 INFO L226 Difference]: Without dead ends: 169677 [2021-05-03 17:26:07,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:26:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169677 states. [2021-05-03 17:26:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169677 to 168995. [2021-05-03 17:26:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168995 states, 168994 states have (on average 4.642513935405991) internal successors, (784557), 168994 states have internal predecessors, (784557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168995 states to 168995 states and 784557 transitions. [2021-05-03 17:26:13,222 INFO L78 Accepts]: Start accepts. Automaton has 168995 states and 784557 transitions. Word has length 27 [2021-05-03 17:26:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:26:13,222 INFO L480 AbstractCegarLoop]: Abstraction has 168995 states and 784557 transitions. [2021-05-03 17:26:13,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 168995 states and 784557 transitions. [2021-05-03 17:26:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:26:14,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:26:14,628 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:26:14,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:26:14,829 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:26:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:26:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1359658504, now seen corresponding path program 11 times [2021-05-03 17:26:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:26:14,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552545199] [2021-05-03 17:26:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:26:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:26:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:26:14,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552545199] [2021-05-03 17:26:14,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871150598] [2021-05-03 17:26:14,913 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 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 [2021-05-03 17:26:14,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:26:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:26:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:26:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:26:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:26:14,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:26:14,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-03 17:26:14,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899604767] [2021-05-03 17:26:14,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:26:14,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:26:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:26:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:26:14,995 INFO L87 Difference]: Start difference. First operand 168995 states and 784557 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:26:17,217 INFO L93 Difference]: Finished difference Result 170167 states and 789041 transitions. [2021-05-03 17:26:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:26:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:26:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:26:18,020 INFO L225 Difference]: With dead ends: 170167 [2021-05-03 17:26:18,020 INFO L226 Difference]: Without dead ends: 170103 [2021-05-03 17:26:18,020 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:26:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170103 states. [2021-05-03 17:26:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170103 to 169031. [2021-05-03 17:26:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169031 states, 169030 states have (on average 4.6426492338638115) internal successors, (784747), 169030 states have internal predecessors, (784747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169031 states to 169031 states and 784747 transitions. [2021-05-03 17:26:24,416 INFO L78 Accepts]: Start accepts. Automaton has 169031 states and 784747 transitions. Word has length 27 [2021-05-03 17:26:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:26:24,416 INFO L480 AbstractCegarLoop]: Abstraction has 169031 states and 784747 transitions. [2021-05-03 17:26:24,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 169031 states and 784747 transitions. [2021-05-03 17:26:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:26:24,967 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:26:24,967 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:26:25,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-03 17:26:25,169 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:26:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:26:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash -12880078, now seen corresponding path program 1 times [2021-05-03 17:26:25,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:26:25,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733464484] [2021-05-03 17:26:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:26:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:26:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:26:25,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733464484] [2021-05-03 17:26:25,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804471601] [2021-05-03 17:26:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 17:26:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:26:26,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:26:26,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:26:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:26:26,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:26:26,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:26:26,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423708861] [2021-05-03 17:26:26,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:26:26,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:26:26,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:26:26,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:26:26,079 INFO L87 Difference]: Start difference. First operand 169031 states and 784747 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:26:28,669 INFO L93 Difference]: Finished difference Result 231052 states and 1059448 transitions. [2021-05-03 17:26:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 17:26:28,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:26:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:26:29,862 INFO L225 Difference]: With dead ends: 231052 [2021-05-03 17:26:29,862 INFO L226 Difference]: Without dead ends: 230212 [2021-05-03 17:26:29,863 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:26:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230212 states. [2021-05-03 17:26:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230212 to 215303. [2021-05-03 17:26:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215303 states, 215302 states have (on average 4.630277470715553) internal successors, (996908), 215302 states have internal predecessors, (996908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215303 states to 215303 states and 996908 transitions. [2021-05-03 17:26:38,999 INFO L78 Accepts]: Start accepts. Automaton has 215303 states and 996908 transitions. Word has length 27 [2021-05-03 17:26:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:26:38,999 INFO L480 AbstractCegarLoop]: Abstraction has 215303 states and 996908 transitions. [2021-05-03 17:26:38,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:38,999 INFO L276 IsEmpty]: Start isEmpty. Operand 215303 states and 996908 transitions. [2021-05-03 17:26:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:26:39,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:26:39,719 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:26:39,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-03 17:26:39,920 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:26:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:26:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash 437854002, now seen corresponding path program 2 times [2021-05-03 17:26:39,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:26:39,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533709948] [2021-05-03 17:26:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:26:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:26:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:26:39,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533709948] [2021-05-03 17:26:39,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496593504] [2021-05-03 17:26:39,950 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 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 [2021-05-03 17:26:39,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:26:39,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:26:39,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:26:39,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:26:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:26:40,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:26:40,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:26:40,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517453134] [2021-05-03 17:26:40,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:26:40,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:26:40,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:26:40,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:26:40,039 INFO L87 Difference]: Start difference. First operand 215303 states and 996908 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:26:43,676 INFO L93 Difference]: Finished difference Result 296156 states and 1355402 transitions. [2021-05-03 17:26:43,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:26:43,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:26:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:26:45,451 INFO L225 Difference]: With dead ends: 296156 [2021-05-03 17:26:45,452 INFO L226 Difference]: Without dead ends: 294999 [2021-05-03 17:26:45,452 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:26:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294999 states. [2021-05-03 17:26:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294999 to 265682. [2021-05-03 17:26:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265682 states, 265681 states have (on average 4.624143239448813) internal successors, (1228547), 265681 states have internal predecessors, (1228547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265682 states to 265682 states and 1228547 transitions. [2021-05-03 17:26:57,834 INFO L78 Accepts]: Start accepts. Automaton has 265682 states and 1228547 transitions. Word has length 27 [2021-05-03 17:26:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:26:57,834 INFO L480 AbstractCegarLoop]: Abstraction has 265682 states and 1228547 transitions. [2021-05-03 17:26:57,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:26:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 265682 states and 1228547 transitions. [2021-05-03 17:26:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:26:58,675 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:26:58,675 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:26:58,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:26:58,875 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:26:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:26:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1592361616, now seen corresponding path program 20 times [2021-05-03 17:26:58,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:26:58,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703736785] [2021-05-03 17:26:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:26:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:26:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:26:58,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703736785] [2021-05-03 17:26:58,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789224972] [2021-05-03 17:26:58,911 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 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 [2021-05-03 17:26:58,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:26:58,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:26:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:26:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:26:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:26:59,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:26:59,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 17:26:59,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392471406] [2021-05-03 17:26:59,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:26:59,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:26:59,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:26:59,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:26:59,032 INFO L87 Difference]: Start difference. First operand 265682 states and 1228547 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:27:02,342 INFO L93 Difference]: Finished difference Result 280030 states and 1288968 transitions. [2021-05-03 17:27:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:27:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:27:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:27:04,812 INFO L225 Difference]: With dead ends: 280030 [2021-05-03 17:27:04,812 INFO L226 Difference]: Without dead ends: 279981 [2021-05-03 17:27:04,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:27:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279981 states. [2021-05-03 17:27:13,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279981 to 265735. [2021-05-03 17:27:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265735 states, 265734 states have (on average 4.623932202879572) internal successors, (1228736), 265734 states have internal predecessors, (1228736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265735 states to 265735 states and 1228736 transitions. [2021-05-03 17:27:16,372 INFO L78 Accepts]: Start accepts. Automaton has 265735 states and 1228736 transitions. Word has length 27 [2021-05-03 17:27:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:27:16,372 INFO L480 AbstractCegarLoop]: Abstraction has 265735 states and 1228736 transitions. [2021-05-03 17:27:16,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 265735 states and 1228736 transitions. [2021-05-03 17:27:17,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:27:17,321 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:27:17,321 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:27:17,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:27:17,522 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:27:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:27:17,523 INFO L82 PathProgramCache]: Analyzing trace with hash -571422738, now seen corresponding path program 3 times [2021-05-03 17:27:17,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:27:17,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587056650] [2021-05-03 17:27:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:27:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:27:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:27:17,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587056650] [2021-05-03 17:27:17,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344883824] [2021-05-03 17:27:17,553 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 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 [2021-05-03 17:27:17,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:27:17,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:27:17,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:27:17,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:27:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:27:17,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:27:17,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:27:17,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442735821] [2021-05-03 17:27:17,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:27:17,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:27:17,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:27:17,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:27:17,640 INFO L87 Difference]: Start difference. First operand 265735 states and 1228736 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:27:22,046 INFO L93 Difference]: Finished difference Result 375985 states and 1718669 transitions. [2021-05-03 17:27:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:27:22,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:27:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:27:24,808 INFO L225 Difference]: With dead ends: 375985 [2021-05-03 17:27:24,808 INFO L226 Difference]: Without dead ends: 373740 [2021-05-03 17:27:24,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:27:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373740 states. [2021-05-03 17:27:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373740 to 251750. [2021-05-03 17:27:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251750 states, 251749 states have (on average 4.610206991884774) internal successors, (1160615), 251749 states have internal predecessors, (1160615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251750 states to 251750 states and 1160615 transitions. [2021-05-03 17:27:35,911 INFO L78 Accepts]: Start accepts. Automaton has 251750 states and 1160615 transitions. Word has length 27 [2021-05-03 17:27:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:27:35,911 INFO L480 AbstractCegarLoop]: Abstraction has 251750 states and 1160615 transitions. [2021-05-03 17:27:35,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 251750 states and 1160615 transitions. [2021-05-03 17:27:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:27:37,656 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:27:37,657 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:27:37,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:27:37,857 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:27:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:27:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1228632456, now seen corresponding path program 21 times [2021-05-03 17:27:37,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:27:37,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994932547] [2021-05-03 17:27:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:27:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:27:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:27:37,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994932547] [2021-05-03 17:27:37,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671281355] [2021-05-03 17:27:37,893 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 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 [2021-05-03 17:27:37,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:27:37,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:27:37,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:27:37,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:27:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:27:38,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:27:38,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 17:27:38,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108588907] [2021-05-03 17:27:38,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:27:38,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:27:38,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:27:38,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:27:38,008 INFO L87 Difference]: Start difference. First operand 251750 states and 1160615 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:27:40,886 INFO L93 Difference]: Finished difference Result 266361 states and 1221475 transitions. [2021-05-03 17:27:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:27:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:27:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:27:42,964 INFO L225 Difference]: With dead ends: 266361 [2021-05-03 17:27:42,964 INFO L226 Difference]: Without dead ends: 266295 [2021-05-03 17:27:42,965 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:27:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266295 states. [2021-05-03 17:27:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266295 to 251509. [2021-05-03 17:27:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251509 states, 251508 states have (on average 4.610636639788794) internal successors, (1159612), 251508 states have internal predecessors, (1159612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251509 states to 251509 states and 1159612 transitions. [2021-05-03 17:27:54,016 INFO L78 Accepts]: Start accepts. Automaton has 251509 states and 1159612 transitions. Word has length 27 [2021-05-03 17:27:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:27:54,016 INFO L480 AbstractCegarLoop]: Abstraction has 251509 states and 1159612 transitions. [2021-05-03 17:27:54,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 251509 states and 1159612 transitions. [2021-05-03 17:27:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:27:55,710 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:27:55,710 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:27:55,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:27:55,929 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:27:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:27:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash 994714892, now seen corresponding path program 22 times [2021-05-03 17:27:55,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:27:55,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322174312] [2021-05-03 17:27:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:27:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:27:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:27:55,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322174312] [2021-05-03 17:27:55,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109961772] [2021-05-03 17:27:55,962 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 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 [2021-05-03 17:27:55,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:27:55,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:27:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:27:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:27:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:27:56,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:27:56,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 17:27:56,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901374458] [2021-05-03 17:27:56,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:27:56,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:27:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:27:56,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:27:56,063 INFO L87 Difference]: Start difference. First operand 251509 states and 1159612 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:27:59,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:27:59,897 INFO L93 Difference]: Finished difference Result 265127 states and 1216578 transitions. [2021-05-03 17:27:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:27:59,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:27:59,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:28:02,052 INFO L225 Difference]: With dead ends: 265127 [2021-05-03 17:28:02,052 INFO L226 Difference]: Without dead ends: 265036 [2021-05-03 17:28:02,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:28:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265036 states. [2021-05-03 17:28:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265036 to 251254. [2021-05-03 17:28:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251254 states, 251253 states have (on average 4.609640481904694) internal successors, (1158186), 251253 states have internal predecessors, (1158186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:28:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251254 states to 251254 states and 1158186 transitions. [2021-05-03 17:28:12,872 INFO L78 Accepts]: Start accepts. Automaton has 251254 states and 1158186 transitions. Word has length 27 [2021-05-03 17:28:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:28:12,872 INFO L480 AbstractCegarLoop]: Abstraction has 251254 states and 1158186 transitions. [2021-05-03 17:28:12,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:28:12,872 INFO L276 IsEmpty]: Start isEmpty. Operand 251254 states and 1158186 transitions. [2021-05-03 17:28:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:28:13,667 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:28:13,667 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:28:13,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:28:13,873 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:28:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:28:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash -4179154, now seen corresponding path program 16 times [2021-05-03 17:28:13,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:28:13,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845750692] [2021-05-03 17:28:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:28:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:28:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:28:13,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845750692] [2021-05-03 17:28:13,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923287555] [2021-05-03 17:28:13,921 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 [2021-05-03 17:28:13,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:28:13,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:28:13,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 17:28:13,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:28:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:28:13,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:28:13,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-03 17:28:13,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298427862] [2021-05-03 17:28:13,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:28:13,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:28:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:28:13,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:28:13,988 INFO L87 Difference]: Start difference. First operand 251254 states and 1158186 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:28:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:28:16,580 INFO L93 Difference]: Finished difference Result 253117 states and 1165203 transitions. [2021-05-03 17:28:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:28:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:28:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:28:18,535 INFO L225 Difference]: With dead ends: 253117 [2021-05-03 17:28:18,535 INFO L226 Difference]: Without dead ends: 253008 [2021-05-03 17:28:18,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:28:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253008 states. [2021-05-03 17:28:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253008 to 251574. [2021-05-03 17:28:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251574 states, 251573 states have (on average 4.6087099967007585) internal successors, (1159427), 251573 states have internal predecessors, (1159427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:28:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251574 states to 251574 states and 1159427 transitions. [2021-05-03 17:28:28,939 INFO L78 Accepts]: Start accepts. Automaton has 251574 states and 1159427 transitions. Word has length 27 [2021-05-03 17:28:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:28:28,939 INFO L480 AbstractCegarLoop]: Abstraction has 251574 states and 1159427 transitions. [2021-05-03 17:28:28,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:28:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 251574 states and 1159427 transitions. [2021-05-03 17:28:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:28:29,817 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:28:29,817 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:28:30,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 17:28:30,034 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:28:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:28:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash -633472846, now seen corresponding path program 17 times [2021-05-03 17:28:30,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:28:30,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086897569] [2021-05-03 17:28:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:28:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:28:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:28:30,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086897569] [2021-05-03 17:28:30,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676602926] [2021-05-03 17:28:30,101 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 [2021-05-03 17:28:30,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:28:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:28:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 17:28:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:28:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:28:30,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:28:30,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 17:28:30,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773084107] [2021-05-03 17:28:30,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:28:30,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:28:30,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:28:30,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:28:30,247 INFO L87 Difference]: Start difference. First operand 251574 states and 1159427 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:28:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:28:34,050 INFO L93 Difference]: Finished difference Result 267856 states and 1227050 transitions. [2021-05-03 17:28:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:28:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:28:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:28:35,532 INFO L225 Difference]: With dead ends: 267856 [2021-05-03 17:28:35,532 INFO L226 Difference]: Without dead ends: 267479 [2021-05-03 17:28:35,532 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:28:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267479 states. [2021-05-03 17:28:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267479 to 252083. [2021-05-03 17:28:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252083 states, 252082 states have (on average 4.6086789219380995) internal successors, (1161765), 252082 states have internal predecessors, (1161765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:28:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252083 states to 252083 states and 1161765 transitions. [2021-05-03 17:28:45,758 INFO L78 Accepts]: Start accepts. Automaton has 252083 states and 1161765 transitions. Word has length 27 [2021-05-03 17:28:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:28:45,758 INFO L480 AbstractCegarLoop]: Abstraction has 252083 states and 1161765 transitions. [2021-05-03 17:28:45,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:28:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 252083 states and 1161765 transitions. [2021-05-03 17:28:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:28:46,516 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:28:46,516 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:28:46,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 17:28:46,716 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:28:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:28:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash -416444856, now seen corresponding path program 18 times [2021-05-03 17:28:46,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:28:46,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099601800] [2021-05-03 17:28:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:28:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:28:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:28:46,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099601800] [2021-05-03 17:28:46,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864089137] [2021-05-03 17:28:46,782 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 [2021-05-03 17:28:46,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:28:46,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:28:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 17:28:46,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:28:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:28:46,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:28:46,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:28:46,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426973025] [2021-05-03 17:28:46,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:28:46,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:28:46,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:28:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:28:46,911 INFO L87 Difference]: Start difference. First operand 252083 states and 1161765 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:28:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:28:50,759 INFO L93 Difference]: Finished difference Result 254371 states and 1170289 transitions. [2021-05-03 17:28:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:28:50,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:28:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:28:52,804 INFO L225 Difference]: With dead ends: 254371 [2021-05-03 17:28:52,804 INFO L226 Difference]: Without dead ends: 254257 [2021-05-03 17:28:52,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:28:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254257 states. [2021-05-03 17:28:59,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254257 to 251906. [2021-05-03 17:29:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251906 states, 251905 states have (on average 4.6087374208531) internal successors, (1160964), 251905 states have internal predecessors, (1160964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251906 states to 251906 states and 1160964 transitions. [2021-05-03 17:29:02,809 INFO L78 Accepts]: Start accepts. Automaton has 251906 states and 1160964 transitions. Word has length 27 [2021-05-03 17:29:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:29:02,809 INFO L480 AbstractCegarLoop]: Abstraction has 251906 states and 1160964 transitions. [2021-05-03 17:29:02,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 251906 states and 1160964 transitions. [2021-05-03 17:29:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:29:03,712 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:29:03,712 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:29:03,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:29:03,913 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:29:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:29:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1482095318, now seen corresponding path program 19 times [2021-05-03 17:29:03,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:29:03,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936277906] [2021-05-03 17:29:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:29:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:29:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:29:04,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936277906] [2021-05-03 17:29:04,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321982547] [2021-05-03 17:29:04,730 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 [2021-05-03 17:29:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:29:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 17:29:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:29:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:29:04,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:29:04,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:29:04,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812836238] [2021-05-03 17:29:04,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:29:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:29:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:29:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:29:04,920 INFO L87 Difference]: Start difference. First operand 251906 states and 1160964 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:29:08,506 INFO L93 Difference]: Finished difference Result 325692 states and 1489315 transitions. [2021-05-03 17:29:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:29:08,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:29:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:29:10,992 INFO L225 Difference]: With dead ends: 325692 [2021-05-03 17:29:10,992 INFO L226 Difference]: Without dead ends: 325314 [2021-05-03 17:29:10,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1102.8ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:29:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325314 states. [2021-05-03 17:29:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325314 to 256688. [2021-05-03 17:29:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256688 states, 256687 states have (on average 4.61244628672274) internal successors, (1183955), 256687 states have internal predecessors, (1183955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256688 states to 256688 states and 1183955 transitions. [2021-05-03 17:29:22,630 INFO L78 Accepts]: Start accepts. Automaton has 256688 states and 1183955 transitions. Word has length 27 [2021-05-03 17:29:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:29:22,630 INFO L480 AbstractCegarLoop]: Abstraction has 256688 states and 1183955 transitions. [2021-05-03 17:29:22,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 256688 states and 1183955 transitions. [2021-05-03 17:29:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:29:23,523 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:29:23,523 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:29:23,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:29:23,724 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:29:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:29:23,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1862249856, now seen corresponding path program 20 times [2021-05-03 17:29:23,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:29:23,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572400842] [2021-05-03 17:29:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:29:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:29:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:29:23,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572400842] [2021-05-03 17:29:23,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932934742] [2021-05-03 17:29:23,804 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 [2021-05-03 17:29:23,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:29:23,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:29:23,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 17:29:23,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:29:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:29:23,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:29:23,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 17:29:23,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996959395] [2021-05-03 17:29:23,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:29:23,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:29:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:29:23,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:29:23,952 INFO L87 Difference]: Start difference. First operand 256688 states and 1183955 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:29:27,895 INFO L93 Difference]: Finished difference Result 299739 states and 1374275 transitions. [2021-05-03 17:29:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:29:27,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:29:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:29:29,632 INFO L225 Difference]: With dead ends: 299739 [2021-05-03 17:29:29,632 INFO L226 Difference]: Without dead ends: 299526 [2021-05-03 17:29:29,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:29:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299526 states. [2021-05-03 17:29:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299526 to 257027. [2021-05-03 17:29:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257027 states, 257026 states have (on average 4.612817380342845) internal successors, (1185614), 257026 states have internal predecessors, (1185614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257027 states to 257027 states and 1185614 transitions. [2021-05-03 17:29:41,984 INFO L78 Accepts]: Start accepts. Automaton has 257027 states and 1185614 transitions. Word has length 27 [2021-05-03 17:29:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:29:41,984 INFO L480 AbstractCegarLoop]: Abstraction has 257027 states and 1185614 transitions. [2021-05-03 17:29:41,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 257027 states and 1185614 transitions. [2021-05-03 17:29:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:29:42,862 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:29:42,862 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:29:43,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:29:43,063 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:29:43,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:29:43,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1181669522, now seen corresponding path program 21 times [2021-05-03 17:29:43,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:29:43,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960198884] [2021-05-03 17:29:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:29:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:29:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:29:43,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960198884] [2021-05-03 17:29:43,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531605043] [2021-05-03 17:29:43,136 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) [2021-05-03 17:29:43,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:29:43,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:29:43,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 17:29:43,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:29:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:29:43,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:29:43,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:29:43,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435278921] [2021-05-03 17:29:43,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:29:43,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:29:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:29:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:29:43,268 INFO L87 Difference]: Start difference. First operand 257027 states and 1185614 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:29:46,840 INFO L93 Difference]: Finished difference Result 259045 states and 1193037 transitions. [2021-05-03 17:29:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:29:46,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:29:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:29:49,374 INFO L225 Difference]: With dead ends: 259045 [2021-05-03 17:29:49,375 INFO L226 Difference]: Without dead ends: 258901 [2021-05-03 17:29:49,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:29:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258901 states. [2021-05-03 17:29:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258901 to 257025. [2021-05-03 17:29:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257025 states, 257024 states have (on average 4.612748225846613) internal successors, (1185587), 257024 states have internal predecessors, (1185587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257025 states to 257025 states and 1185587 transitions. [2021-05-03 17:29:58,624 INFO L78 Accepts]: Start accepts. Automaton has 257025 states and 1185587 transitions. Word has length 27 [2021-05-03 17:29:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:29:58,625 INFO L480 AbstractCegarLoop]: Abstraction has 257025 states and 1185587 transitions. [2021-05-03 17:29:58,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:29:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 257025 states and 1185587 transitions. [2021-05-03 17:29:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:29:59,273 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:29:59,273 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:29:59,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:29:59,477 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:29:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:29:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2006632694, now seen corresponding path program 22 times [2021-05-03 17:29:59,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:29:59,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395736320] [2021-05-03 17:29:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:29:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:29:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:29:59,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395736320] [2021-05-03 17:29:59,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729482633] [2021-05-03 17:29:59,545 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 [2021-05-03 17:29:59,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:29:59,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:29:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 17:29:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:29:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:29:59,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:29:59,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 17:29:59,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351854250] [2021-05-03 17:29:59,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:29:59,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:29:59,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:29:59,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:29:59,707 INFO L87 Difference]: Start difference. First operand 257025 states and 1185587 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:30:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:30:03,345 INFO L93 Difference]: Finished difference Result 310744 states and 1424816 transitions. [2021-05-03 17:30:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 17:30:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:30:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:30:05,355 INFO L225 Difference]: With dead ends: 310744 [2021-05-03 17:30:05,355 INFO L226 Difference]: Without dead ends: 310258 [2021-05-03 17:30:05,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 17:30:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310258 states. [2021-05-03 17:30:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310258 to 257783. [2021-05-03 17:30:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257783 states, 257782 states have (on average 4.614073131560776) internal successors, (1189425), 257782 states have internal predecessors, (1189425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:30:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257783 states to 257783 states and 1189425 transitions. [2021-05-03 17:30:14,945 INFO L78 Accepts]: Start accepts. Automaton has 257783 states and 1189425 transitions. Word has length 27 [2021-05-03 17:30:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:30:14,945 INFO L480 AbstractCegarLoop]: Abstraction has 257783 states and 1189425 transitions. [2021-05-03 17:30:14,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:30:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 257783 states and 1189425 transitions. [2021-05-03 17:30:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:30:15,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:30:15,628 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:30:15,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-03 17:30:15,838 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:30:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:30:15,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1626478156, now seen corresponding path program 23 times [2021-05-03 17:30:15,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:30:15,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791265527] [2021-05-03 17:30:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:30:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:30:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:30:15,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791265527] [2021-05-03 17:30:15,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922769401] [2021-05-03 17:30:15,907 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 [2021-05-03 17:30:15,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:30:15,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:30:15,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 17:30:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:30:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:30:16,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:30:16,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:30:16,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373958328] [2021-05-03 17:30:16,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:30:16,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:30:16,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:30:16,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:30:16,059 INFO L87 Difference]: Start difference. First operand 257783 states and 1189425 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:30:19,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:30:19,416 INFO L93 Difference]: Finished difference Result 302306 states and 1385841 transitions. [2021-05-03 17:30:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:30:19,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:30:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:30:20,663 INFO L225 Difference]: With dead ends: 302306 [2021-05-03 17:30:20,663 INFO L226 Difference]: Without dead ends: 302093 [2021-05-03 17:30:20,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:30:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302093 states. [2021-05-03 17:30:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302093 to 257810. [2021-05-03 17:30:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257810 states, 257809 states have (on average 4.614260945118286) internal successors, (1189598), 257809 states have internal predecessors, (1189598), 0 states have call successors, (0), 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... [2021-05-03 17:30:28,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:30:28,699 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 17:30:28,703 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 17:30:28,703 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 05:30:28 BasicIcfg [2021-05-03 17:30:28,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 17:30:28,704 INFO L168 Benchmark]: Toolchain (without parser) took 674601.29 ms. Allocated memory was 385.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 365.3 MB in the beginning and 9.0 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.2 GB. Max. memory is 16.0 GB. [2021-05-03 17:30:28,704 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 385.9 MB. Free memory was 366.5 MB in the beginning and 366.4 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 17:30:28,704 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.66 ms. Allocated memory is still 385.9 MB. Free memory was 365.2 MB in the beginning and 363.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 17:30:28,704 INFO L168 Benchmark]: Boogie Preprocessor took 20.09 ms. Allocated memory is still 385.9 MB. Free memory was 363.8 MB in the beginning and 362.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 17:30:28,704 INFO L168 Benchmark]: RCFGBuilder took 228.17 ms. Allocated memory is still 385.9 MB. Free memory was 362.7 MB in the beginning and 349.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 17:30:28,704 INFO L168 Benchmark]: TraceAbstraction took 674323.68 ms. Allocated memory was 385.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 349.1 MB in the beginning and 9.0 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.2 GB. Max. memory is 16.0 GB. [2021-05-03 17:30:28,704 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 0.11 ms. Allocated memory is still 385.9 MB. Free memory was 366.5 MB in the beginning and 366.4 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.66 ms. Allocated memory is still 385.9 MB. Free memory was 365.2 MB in the beginning and 363.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.09 ms. Allocated memory is still 385.9 MB. Free memory was 363.8 MB in the beginning and 362.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 228.17 ms. Allocated memory is still 385.9 MB. Free memory was 362.7 MB in the beginning and 349.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 674323.68 ms. Allocated memory was 385.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 349.1 MB in the beginning and 9.0 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 72). Cancelled while ReachableStatesComputation was computing reachable states (132244 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 674168.5ms, OverallIterations: 118, TraceHistogramMax: 3, EmptinessCheckTime: 39127.1ms, AutomataDifference: 205972.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 61.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6276 SDtfs, 12975 SDslu, 23881 SDs, 0 SdLazy, 25752 SolverSat, 3701 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15177.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3822 GetRequests, 2351 SyntacticMatches, 224 SemanticMatches, 1247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4717 ImplicationChecksByTransitivity, 11883.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=265735occurred in iteration=107, InterpolantAutomatonStates: 1303, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 385441.3ms AutomataMinimizationTime, 118 MinimizatonAttempts, 1048152 StatesRemovedByMinimization, 117 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1213.4ms SsaConstructionTime, 2016.0ms SatisfiabilityAnalysisTime, 14917.9ms InterpolantComputationTime, 5668 NumberOfCodeBlocks, 5663 NumberOfCodeBlocksAsserted, 336 NumberOfCheckSat, 5440 ConstructedInterpolants, 0 QuantifiedInterpolants, 26527 SizeOfPredicates, 127 NumberOfNonLiveVariables, 7787 ConjunctsInSsa, 1159 ConjunctsInUnsatCore, 228 InterpolantComputations, 10 PerfectInterpolantSequences, 237/942 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