/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/popl20-more/min-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:08:21,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:08:21,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:08:21,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:08:21,870 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-11 00:08:21,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:08:21,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:08:21,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:08:21,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:08:21,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:08:21,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:08:21,915 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:08:21,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:08:21,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:08:21,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:08:21,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:08:21,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:08:21,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:08:21,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:08:21,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:08:21,917 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:08:21,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:08:21,917 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:08:21,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:08:21,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:08:21,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:08:21,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:08:21,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:08:21,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:08:21,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:08:21,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:08:21,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:08:21,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:08:21,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:08:21,919 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:08:21,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:08:21,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:08:22,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:08:22,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:08:22,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:08:22,252 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:08:22,253 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:08:22,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl [2021-03-11 00:08:22,273 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl' [2021-03-11 00:08:22,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:08:22,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:08:22,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:08:22,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:08:22,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:08:22,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... [2021-03-11 00:08:22,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... [2021-03-11 00:08:22,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:08:22,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:08:22,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:08:22,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:08:22,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... [2021-03-11 00:08:22,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... [2021-03-11 00:08:22,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... [2021-03-11 00:08:22,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... [2021-03-11 00:08:22,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... [2021-03-11 00:08:22,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... [2021-03-11 00:08:22,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... [2021-03-11 00:08:22,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:08:22,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:08:22,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:08:22,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:08:22,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:08:22,441 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:08:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:08:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:08:22,442 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:08:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:08:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:08:22,442 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:08:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:08:22,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:08:22,443 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:08:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:08:22,443 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:08:22,444 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:08:22,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:08:22,694 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:08:22,695 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:08:22 BoogieIcfgContainer [2021-03-11 00:08:22,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:08:22,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:08:22,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:08:22,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:08:22,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:22" (1/2) ... [2021-03-11 00:08:22,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453c5beb and model type min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:08:22, skipping insertion in model container [2021-03-11 00:08:22,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:08:22" (2/2) ... [2021-03-11 00:08:22,705 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun-alt.wvr.bpl [2021-03-11 00:08:22,710 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:08:22,710 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:08:22,713 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:08:22,714 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:08:22,743 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:08:22,756 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:08:22,772 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:08:22,772 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:08:22,772 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:08:22,772 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:08:22,772 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:08:22,772 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:08:22,772 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:08:22,773 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:08:22,779 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-03-11 00:08:22,798 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:22,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-11 00:08:22,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:22,808 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:22,808 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-03-11 00:08:22,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:22,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195642518] [2021-03-11 00:08:22,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:22,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195642518] [2021-03-11 00:08:22,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:08:22,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 00:08:22,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753135418] [2021-03-11 00:08:22,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:08:22,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:22,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:08:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:08:22,964 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:23,021 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-03-11 00:08:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:08:23,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-11 00:08:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:23,033 INFO L225 Difference]: With dead ends: 217 [2021-03-11 00:08:23,033 INFO L226 Difference]: Without dead ends: 202 [2021-03-11 00:08:23,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:08:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-11 00:08:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-03-11 00:08:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-03-11 00:08:23,085 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-03-11 00:08:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:23,085 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-03-11 00:08:23,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-03-11 00:08:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:08:23,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:23,088 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:23,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:08:23,089 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-03-11 00:08:23,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:23,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177791295] [2021-03-11 00:08:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:23,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177791295] [2021-03-11 00:08:23,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:08:23,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:08:23,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118614815] [2021-03-11 00:08:23,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:08:23,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:23,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:08:23,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:08:23,154 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:23,202 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-03-11 00:08:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:08:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-11 00:08:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:23,205 INFO L225 Difference]: With dead ends: 158 [2021-03-11 00:08:23,205 INFO L226 Difference]: Without dead ends: 158 [2021-03-11 00:08:23,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:08:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-11 00:08:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-03-11 00:08:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-03-11 00:08:23,219 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-03-11 00:08:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:23,219 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-03-11 00:08:23,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-03-11 00:08:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:08:23,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:23,221 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:23,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:08:23,222 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-03-11 00:08:23,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:23,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832174748] [2021-03-11 00:08:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:23,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832174748] [2021-03-11 00:08:23,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:08:23,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:08:23,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103253998] [2021-03-11 00:08:23,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:08:23,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:08:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:08:23,283 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:23,332 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-03-11 00:08:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:08:23,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-11 00:08:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:23,339 INFO L225 Difference]: With dead ends: 183 [2021-03-11 00:08:23,339 INFO L226 Difference]: Without dead ends: 183 [2021-03-11 00:08:23,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:08:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-11 00:08:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-03-11 00:08:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-03-11 00:08:23,355 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-03-11 00:08:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:23,355 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-03-11 00:08:23,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-03-11 00:08:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:08:23,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:23,357 INFO L519 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] [2021-03-11 00:08:23,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 00:08:23,357 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:23,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-03-11 00:08:23,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:23,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909888724] [2021-03-11 00:08:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:23,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909888724] [2021-03-11 00:08:23,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557098138] [2021-03-11 00:08:23,753 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 [2021-03-11 00:08:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:08:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:24,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-11 00:08:24,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:24,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-11 00:08:24,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:24,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-03-11 00:08:24,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:24,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:24,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:08:24,213 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:95, output treesize:17 [2021-03-11 00:08:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:24,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:24,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:08:24,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763032572] [2021-03-11 00:08:24,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:08:24,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:08:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:08:24,269 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:24,505 INFO L93 Difference]: Finished difference Result 298 states and 839 transitions. [2021-03-11 00:08:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:08:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-03-11 00:08:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:24,509 INFO L225 Difference]: With dead ends: 298 [2021-03-11 00:08:24,509 INFO L226 Difference]: Without dead ends: 283 [2021-03-11 00:08:24,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:08:24,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-03-11 00:08:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 224. [2021-03-11 00:08:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-03-11 00:08:24,544 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-03-11 00:08:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:24,544 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-03-11 00:08:24,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-03-11 00:08:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:08:24,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:24,546 INFO L519 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] [2021-03-11 00:08:24,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:24,775 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:24,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:24,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-03-11 00:08:24,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:24,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548641117] [2021-03-11 00:08:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:24,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548641117] [2021-03-11 00:08:24,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514640231] [2021-03-11 00:08:24,992 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 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 [2021-03-11 00:08:25,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:25,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:08:25,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:25,256 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:25,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:08:25,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:25,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:25,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-03-11 00:08:25,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:25,306 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:25,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:08:25,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:25,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:25,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:08:25,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:25,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:25,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:08:25,389 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:71 [2021-03-11 00:08:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:25,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:25,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-03-11 00:08:25,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050513005] [2021-03-11 00:08:25,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:08:25,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:25,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:08:25,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:08:25,515 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-03-11 00:08:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:26,024 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-03-11 00:08:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:08:26,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 22 [2021-03-11 00:08:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:26,028 INFO L225 Difference]: With dead ends: 374 [2021-03-11 00:08:26,028 INFO L226 Difference]: Without dead ends: 359 [2021-03-11 00:08:26,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 606.4ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:08:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-11 00:08:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-03-11 00:08:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-03-11 00:08:26,039 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-03-11 00:08:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:26,040 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-03-11 00:08:26,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-03-11 00:08:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-03-11 00:08:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:08:26,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:26,042 INFO L519 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] [2021-03-11 00:08:26,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:26,255 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:26,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-03-11 00:08:26,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:26,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295478625] [2021-03-11 00:08:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:26,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295478625] [2021-03-11 00:08:26,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280847762] [2021-03-11 00:08:26,457 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:26,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:08:26,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:26,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:08:26,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:26,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-11 00:08:26,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:26,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:08:26,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:26,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-11 00:08:26,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:26,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-11 00:08:26,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:26,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-03-11 00:08:26,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:26,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-03-11 00:08:26,653 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:26,669 INFO L628 ElimStorePlain]: treesize reduction 10, result has 63.0 percent of original size [2021-03-11 00:08:26,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:08:26,670 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:130, output treesize:17 [2021-03-11 00:08:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:26,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:26,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:08:26,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041188993] [2021-03-11 00:08:26,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:08:26,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:26,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:08:26,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:08:26,707 INFO L87 Difference]: Start difference. First operand 229 states and 664 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) [2021-03-11 00:08:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:26,888 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-03-11 00:08:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:08:26,889 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 22 [2021-03-11 00:08:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:26,891 INFO L225 Difference]: With dead ends: 363 [2021-03-11 00:08:26,892 INFO L226 Difference]: Without dead ends: 348 [2021-03-11 00:08:26,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:08:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-03-11 00:08:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-03-11 00:08:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-03-11 00:08:26,904 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-03-11 00:08:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:26,904 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-03-11 00:08:26,904 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) [2021-03-11 00:08:26,904 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-03-11 00:08:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:08:26,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:26,906 INFO L519 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] [2021-03-11 00:08:27,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-11 00:08:27,123 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:27,124 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-03-11 00:08:27,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:27,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450898231] [2021-03-11 00:08:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:27,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450898231] [2021-03-11 00:08:27,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718875326] [2021-03-11 00:08:27,285 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:27,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:08:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:27,577 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:27,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:08:27,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:27,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:27,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-03-11 00:08:27,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:27,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:27,658 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:27,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:08:27,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:27,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:27,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:08:27,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:27,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:27,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:08:27,735 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-03-11 00:08:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:27,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:27,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:08:27,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638430538] [2021-03-11 00:08:27,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:27,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:27,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:27,876 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-03-11 00:08:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:28,202 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-03-11 00:08:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:08:28,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 22 [2021-03-11 00:08:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:28,206 INFO L225 Difference]: With dead ends: 425 [2021-03-11 00:08:28,206 INFO L226 Difference]: Without dead ends: 410 [2021-03-11 00:08:28,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:08:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-11 00:08:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-03-11 00:08:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-03-11 00:08:28,217 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-03-11 00:08:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:28,219 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-03-11 00:08:28,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-03-11 00:08:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-03-11 00:08:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:28,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:28,220 INFO L519 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] [2021-03-11 00:08:28,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-11 00:08:28,439 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:28,441 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-03-11 00:08:28,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:28,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348246266] [2021-03-11 00:08:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:28,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348246266] [2021-03-11 00:08:28,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145949596] [2021-03-11 00:08:28,503 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:28,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:08:28,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:28,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:28,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:28,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:08:28,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722025930] [2021-03-11 00:08:28,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:08:28,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:28,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:08:28,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:08:28,648 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:29,070 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-03-11 00:08:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:08:29,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-03-11 00:08:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:29,074 INFO L225 Difference]: With dead ends: 619 [2021-03-11 00:08:29,074 INFO L226 Difference]: Without dead ends: 619 [2021-03-11 00:08:29,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:08:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-03-11 00:08:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-03-11 00:08:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-03-11 00:08:29,087 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-03-11 00:08:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:29,088 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-03-11 00:08:29,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:29,088 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-03-11 00:08:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:29,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:29,090 INFO L519 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] [2021-03-11 00:08:29,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-11 00:08:29,307 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:29,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-03-11 00:08:29,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:29,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533542503] [2021-03-11 00:08:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:29,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533542503] [2021-03-11 00:08:29,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495210862] [2021-03-11 00:08:29,354 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 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 [2021-03-11 00:08:29,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:08:29,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:29,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:29,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:29,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:29,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206283680] [2021-03-11 00:08:29,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:29,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:29,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:29,511 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:30,281 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-03-11 00:08:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:08:30,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 24 [2021-03-11 00:08:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:30,288 INFO L225 Difference]: With dead ends: 1078 [2021-03-11 00:08:30,288 INFO L226 Difference]: Without dead ends: 1078 [2021-03-11 00:08:30,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 505.3ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:08:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-03-11 00:08:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-03-11 00:08:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:30,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-03-11 00:08:30,307 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-03-11 00:08:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:30,307 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-03-11 00:08:30,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-03-11 00:08:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:30,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:30,310 INFO L519 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] [2021-03-11 00:08:30,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:30,523 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:30,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-03-11 00:08:30,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:30,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488171987] [2021-03-11 00:08:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:30,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488171987] [2021-03-11 00:08:30,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23814016] [2021-03-11 00:08:30,579 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 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 [2021-03-11 00:08:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:30,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:30,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:30,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:30,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223618947] [2021-03-11 00:08:30,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:30,716 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:31,355 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-03-11 00:08:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:08:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 24 [2021-03-11 00:08:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:31,365 INFO L225 Difference]: With dead ends: 951 [2021-03-11 00:08:31,366 INFO L226 Difference]: Without dead ends: 951 [2021-03-11 00:08:31,366 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:08:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-03-11 00:08:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-03-11 00:08:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-03-11 00:08:31,381 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-03-11 00:08:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:31,382 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-03-11 00:08:31,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-03-11 00:08:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:31,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:31,383 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:31,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-11 00:08:31,607 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:31,608 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-03-11 00:08:31,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:31,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894170968] [2021-03-11 00:08:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:31,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894170968] [2021-03-11 00:08:31,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591443806] [2021-03-11 00:08:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:31,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:08:31,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:31,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:31,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:08:31,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268689191] [2021-03-11 00:08:31,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:08:31,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:31,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:08:31,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:08:31,741 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:31,859 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-03-11 00:08:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:08:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-03-11 00:08:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:31,863 INFO L225 Difference]: With dead ends: 669 [2021-03-11 00:08:31,863 INFO L226 Difference]: Without dead ends: 663 [2021-03-11 00:08:31,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-11 00:08:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-03-11 00:08:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-03-11 00:08:31,878 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-03-11 00:08:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:31,879 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-03-11 00:08:31,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-03-11 00:08:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:31,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:31,881 INFO L519 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] [2021-03-11 00:08:32,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-11 00:08:32,104 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:32,104 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-03-11 00:08:32,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:32,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572009175] [2021-03-11 00:08:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:32,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572009175] [2021-03-11 00:08:32,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979015752] [2021-03-11 00:08:32,158 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:32,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:32,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:32,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:32,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:32,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:32,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:08:32,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862710725] [2021-03-11 00:08:32,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:32,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:32,273 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-03-11 00:08:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:32,442 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-03-11 00:08:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:08:32,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-03-11 00:08:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:32,446 INFO L225 Difference]: With dead ends: 710 [2021-03-11 00:08:32,447 INFO L226 Difference]: Without dead ends: 672 [2021-03-11 00:08:32,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:08:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-11 00:08:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-03-11 00:08:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-03-11 00:08:32,465 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-03-11 00:08:32,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:32,466 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-03-11 00:08:32,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-03-11 00:08:32,466 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-03-11 00:08:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:32,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:32,468 INFO L519 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] [2021-03-11 00:08:32,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-11 00:08:32,691 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:32,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-03-11 00:08:32,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:32,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530795250] [2021-03-11 00:08:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:32,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530795250] [2021-03-11 00:08:32,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831697387] [2021-03-11 00:08:32,724 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 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 [2021-03-11 00:08:32,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:32,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:08:32,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:32,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:32,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:08:32,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172066507] [2021-03-11 00:08:32,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:08:32,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:08:32,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:08:32,812 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:32,911 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-03-11 00:08:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:08:32,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-03-11 00:08:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:32,916 INFO L225 Difference]: With dead ends: 830 [2021-03-11 00:08:32,916 INFO L226 Difference]: Without dead ends: 830 [2021-03-11 00:08:32,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-11 00:08:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-03-11 00:08:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-03-11 00:08:32,934 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-03-11 00:08:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:32,935 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-03-11 00:08:32,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-03-11 00:08:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:32,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:32,937 INFO L519 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] [2021-03-11 00:08:33,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:33,154 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-03-11 00:08:33,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:33,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528604963] [2021-03-11 00:08:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:33,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528604963] [2021-03-11 00:08:33,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593089079] [2021-03-11 00:08:33,208 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:33,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:08:33,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:33,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:33,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:33,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:33,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:08:33,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283943322] [2021-03-11 00:08:33,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:08:33,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:08:33,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:08:33,339 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:33,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:33,617 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-03-11 00:08:33,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:08:33,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-03-11 00:08:33,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:33,624 INFO L225 Difference]: With dead ends: 1196 [2021-03-11 00:08:33,624 INFO L226 Difference]: Without dead ends: 1196 [2021-03-11 00:08:33,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:08:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-03-11 00:08:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-03-11 00:08:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-03-11 00:08:33,647 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-03-11 00:08:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:33,648 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-03-11 00:08:33,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-03-11 00:08:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:33,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:33,650 INFO L519 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] [2021-03-11 00:08:33,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-11 00:08:33,873 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:33,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-03-11 00:08:33,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:33,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189895735] [2021-03-11 00:08:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:33,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189895735] [2021-03-11 00:08:33,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725995268] [2021-03-11 00:08:33,922 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:08:33,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:33,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:33,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:34,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:34,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:08:34,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723794398] [2021-03-11 00:08:34,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:08:34,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:34,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:08:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:08:34,042 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:34,480 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-03-11 00:08:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:08:34,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-03-11 00:08:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:34,488 INFO L225 Difference]: With dead ends: 1492 [2021-03-11 00:08:34,488 INFO L226 Difference]: Without dead ends: 1492 [2021-03-11 00:08:34,488 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:08:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-11 00:08:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-03-11 00:08:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-03-11 00:08:34,512 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-03-11 00:08:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:34,512 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-03-11 00:08:34,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-03-11 00:08:34,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:34,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:34,514 INFO L519 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] [2021-03-11 00:08:34,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:34,730 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-03-11 00:08:34,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:34,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491359417] [2021-03-11 00:08:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:34,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491359417] [2021-03-11 00:08:34,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339381397] [2021-03-11 00:08:34,781 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:08:34,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:34,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:34,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:34,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:34,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:34,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:08:34,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295170476] [2021-03-11 00:08:34,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:34,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:34,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:34,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:34,914 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-03-11 00:08:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:35,205 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-03-11 00:08:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:08:35,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-03-11 00:08:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:35,210 INFO L225 Difference]: With dead ends: 1258 [2021-03-11 00:08:35,210 INFO L226 Difference]: Without dead ends: 1248 [2021-03-11 00:08:35,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:08:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-11 00:08:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-03-11 00:08:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-03-11 00:08:35,241 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-03-11 00:08:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:35,241 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-03-11 00:08:35,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-03-11 00:08:35,242 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-03-11 00:08:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:35,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:35,244 INFO L519 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] [2021-03-11 00:08:35,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-11 00:08:35,464 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-03-11 00:08:35,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:35,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440658085] [2021-03-11 00:08:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:35,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440658085] [2021-03-11 00:08:35,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839155145] [2021-03-11 00:08:35,506 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 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 [2021-03-11 00:08:35,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:08:35,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:35,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:35,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:08:35,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634139799] [2021-03-11 00:08:35,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:35,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:35,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:35,626 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:35,913 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-03-11 00:08:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:08:35,914 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-03-11 00:08:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:35,920 INFO L225 Difference]: With dead ends: 1329 [2021-03-11 00:08:35,920 INFO L226 Difference]: Without dead ends: 1329 [2021-03-11 00:08:35,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:08:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-11 00:08:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-03-11 00:08:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-03-11 00:08:35,951 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-03-11 00:08:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:35,952 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-03-11 00:08:35,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-03-11 00:08:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:35,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:35,957 INFO L519 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] [2021-03-11 00:08:36,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:36,180 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:36,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-03-11 00:08:36,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:36,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581230869] [2021-03-11 00:08:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:36,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581230869] [2021-03-11 00:08:36,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856501242] [2021-03-11 00:08:36,226 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:36,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:36,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:36,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:36,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:08:36,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808976386] [2021-03-11 00:08:36,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:08:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:08:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:08:36,320 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:36,669 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-03-11 00:08:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:08:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-03-11 00:08:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:36,676 INFO L225 Difference]: With dead ends: 1548 [2021-03-11 00:08:36,677 INFO L226 Difference]: Without dead ends: 1544 [2021-03-11 00:08:36,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:08:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-03-11 00:08:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-03-11 00:08:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-03-11 00:08:36,704 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-03-11 00:08:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:36,704 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-03-11 00:08:36,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-03-11 00:08:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:36,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:36,708 INFO L519 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] [2021-03-11 00:08:36,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-11 00:08:36,923 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:36,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-03-11 00:08:36,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:36,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472285078] [2021-03-11 00:08:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:36,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472285078] [2021-03-11 00:08:36,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557976636] [2021-03-11 00:08:36,965 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:37,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:37,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:37,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:37,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:37,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:37,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:37,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789716225] [2021-03-11 00:08:37,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:37,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:37,102 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:37,879 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-03-11 00:08:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:08:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 24 [2021-03-11 00:08:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:37,909 INFO L225 Difference]: With dead ends: 2734 [2021-03-11 00:08:37,909 INFO L226 Difference]: Without dead ends: 2734 [2021-03-11 00:08:37,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 478.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:08:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-03-11 00:08:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-03-11 00:08:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-03-11 00:08:37,947 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-03-11 00:08:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:37,947 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-03-11 00:08:37,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-03-11 00:08:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:37,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:37,951 INFO L519 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] [2021-03-11 00:08:38,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:38,166 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-03-11 00:08:38,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:38,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131340659] [2021-03-11 00:08:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:38,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131340659] [2021-03-11 00:08:38,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142582368] [2021-03-11 00:08:38,205 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:38,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:08:38,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:38,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:38,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:38,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:38,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:38,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136172365] [2021-03-11 00:08:38,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:38,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:38,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:38,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:38,356 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:39,050 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-03-11 00:08:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:08:39,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 24 [2021-03-11 00:08:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:39,065 INFO L225 Difference]: With dead ends: 2693 [2021-03-11 00:08:39,065 INFO L226 Difference]: Without dead ends: 2693 [2021-03-11 00:08:39,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:08:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-03-11 00:08:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-03-11 00:08:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-03-11 00:08:39,101 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-03-11 00:08:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:39,102 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-03-11 00:08:39,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-03-11 00:08:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:39,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:39,105 INFO L519 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] [2021-03-11 00:08:39,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-11 00:08:39,319 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:39,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-03-11 00:08:39,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:39,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511480657] [2021-03-11 00:08:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:39,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511480657] [2021-03-11 00:08:39,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123447911] [2021-03-11 00:08:39,362 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) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:39,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:39,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:39,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:39,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:08:39,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369429834] [2021-03-11 00:08:39,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:08:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:39,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:08:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:08:39,474 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:40,066 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-03-11 00:08:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:08:40,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-03-11 00:08:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:40,073 INFO L225 Difference]: With dead ends: 2677 [2021-03-11 00:08:40,073 INFO L226 Difference]: Without dead ends: 2677 [2021-03-11 00:08:40,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 370.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:08:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-11 00:08:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-03-11 00:08:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:40,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-03-11 00:08:40,108 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-03-11 00:08:40,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:40,108 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-03-11 00:08:40,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:40,108 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-03-11 00:08:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:40,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:40,111 INFO L519 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] [2021-03-11 00:08:40,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-11 00:08:40,334 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-03-11 00:08:40,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:40,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960039772] [2021-03-11 00:08:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:40,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960039772] [2021-03-11 00:08:40,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417907713] [2021-03-11 00:08:40,375 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 [2021-03-11 00:08:40,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:08:40,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:40,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:40,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:40,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:40,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:08:40,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772801231] [2021-03-11 00:08:40,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:08:40,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:08:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:08:40,475 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:41,098 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-03-11 00:08:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:08:41,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-03-11 00:08:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:41,134 INFO L225 Difference]: With dead ends: 2474 [2021-03-11 00:08:41,134 INFO L226 Difference]: Without dead ends: 2470 [2021-03-11 00:08:41,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:08:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-03-11 00:08:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-03-11 00:08:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-03-11 00:08:41,168 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-03-11 00:08:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:41,169 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-03-11 00:08:41,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-03-11 00:08:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:41,172 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:41,172 INFO L519 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] [2021-03-11 00:08:41,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-11 00:08:41,387 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:41,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:41,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-03-11 00:08:41,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:41,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698255059] [2021-03-11 00:08:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:41,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698255059] [2021-03-11 00:08:41,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602668548] [2021-03-11 00:08:41,426 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 [2021-03-11 00:08:41,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:08:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:41,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:41,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:41,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107801967] [2021-03-11 00:08:41,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:41,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:41,543 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:42,172 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-03-11 00:08:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:08:42,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-03-11 00:08:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:42,180 INFO L225 Difference]: With dead ends: 2514 [2021-03-11 00:08:42,180 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:08:42,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:08:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:08:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-03-11 00:08:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-03-11 00:08:42,216 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-03-11 00:08:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:42,216 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-03-11 00:08:42,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-03-11 00:08:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:42,219 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:42,219 INFO L519 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] [2021-03-11 00:08:42,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-11 00:08:42,442 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:42,443 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-03-11 00:08:42,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:42,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427060144] [2021-03-11 00:08:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:42,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427060144] [2021-03-11 00:08:42,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36326007] [2021-03-11 00:08:42,481 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 [2021-03-11 00:08:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:42,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:42,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:42,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:42,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703894415] [2021-03-11 00:08:42,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:42,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:42,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:42,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:42,575 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:43,253 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-03-11 00:08:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:08:43,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-03-11 00:08:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:43,261 INFO L225 Difference]: With dead ends: 2332 [2021-03-11 00:08:43,261 INFO L226 Difference]: Without dead ends: 2328 [2021-03-11 00:08:43,261 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:08:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-11 00:08:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-03-11 00:08:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-03-11 00:08:43,293 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-03-11 00:08:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:43,293 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-03-11 00:08:43,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-03-11 00:08:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:43,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:43,296 INFO L519 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] [2021-03-11 00:08:43,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:43,519 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-03-11 00:08:43,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:43,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236269007] [2021-03-11 00:08:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:43,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236269007] [2021-03-11 00:08:43,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40958287] [2021-03-11 00:08:43,550 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:43,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:08:43,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:43,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:08:43,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:43,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:43,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:08:43,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138325624] [2021-03-11 00:08:43,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:08:43,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:43,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:08:43,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:08:43,617 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:43,692 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-03-11 00:08:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:08:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-03-11 00:08:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:43,705 INFO L225 Difference]: With dead ends: 929 [2021-03-11 00:08:43,706 INFO L226 Difference]: Without dead ends: 929 [2021-03-11 00:08:43,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:08:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-11 00:08:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-03-11 00:08:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-03-11 00:08:43,739 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-03-11 00:08:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:43,739 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-03-11 00:08:43,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-03-11 00:08:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:43,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:43,743 INFO L519 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] [2021-03-11 00:08:43,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:43,964 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:43,965 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-03-11 00:08:43,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:43,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253084945] [2021-03-11 00:08:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:44,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253084945] [2021-03-11 00:08:44,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127497960] [2021-03-11 00:08:44,004 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 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 [2021-03-11 00:08:44,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:44,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:44,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:44,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:44,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:08:44,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165570273] [2021-03-11 00:08:44,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:08:44,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:08:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:08:44,082 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:44,370 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-03-11 00:08:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:08:44,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:08:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:44,374 INFO L225 Difference]: With dead ends: 1555 [2021-03-11 00:08:44,374 INFO L226 Difference]: Without dead ends: 1555 [2021-03-11 00:08:44,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:08:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-03-11 00:08:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-03-11 00:08:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-03-11 00:08:44,397 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-03-11 00:08:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:44,397 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-03-11 00:08:44,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-03-11 00:08:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:44,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:44,400 INFO L519 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] [2021-03-11 00:08:44,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-11 00:08:44,623 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:44,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-03-11 00:08:44,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:44,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260650305] [2021-03-11 00:08:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:44,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260650305] [2021-03-11 00:08:44,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512371063] [2021-03-11 00:08:44,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:44,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:08:44,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:44,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:44,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:44,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:08:44,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920841894] [2021-03-11 00:08:44,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:08:44,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:44,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:08:44,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:08:44,755 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:44,988 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-03-11 00:08:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:08:44,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:08:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:44,996 INFO L225 Difference]: With dead ends: 1605 [2021-03-11 00:08:44,996 INFO L226 Difference]: Without dead ends: 1605 [2021-03-11 00:08:44,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:08:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-11 00:08:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-03-11 00:08:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-03-11 00:08:45,021 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-03-11 00:08:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:45,021 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-03-11 00:08:45,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-03-11 00:08:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:45,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:45,024 INFO L519 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] [2021-03-11 00:08:45,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:45,246 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-03-11 00:08:45,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:45,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149203411] [2021-03-11 00:08:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:45,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149203411] [2021-03-11 00:08:45,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940854888] [2021-03-11 00:08:45,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:45,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:45,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:08:45,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:45,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:08:45,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245078523] [2021-03-11 00:08:45,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:08:45,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:45,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:08:45,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:08:45,362 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:45,560 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-03-11 00:08:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:08:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:08:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:45,563 INFO L225 Difference]: With dead ends: 1524 [2021-03-11 00:08:45,563 INFO L226 Difference]: Without dead ends: 1520 [2021-03-11 00:08:45,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:08:45,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-11 00:08:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-03-11 00:08:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-03-11 00:08:45,581 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-03-11 00:08:45,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:45,582 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-03-11 00:08:45,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-03-11 00:08:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:45,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:45,584 INFO L519 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] [2021-03-11 00:08:45,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-11 00:08:45,799 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:45,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-03-11 00:08:45,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:45,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745015192] [2021-03-11 00:08:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:45,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745015192] [2021-03-11 00:08:45,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528540070] [2021-03-11 00:08:45,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:45,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:08:45,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:45,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:45,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:45,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:45,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:08:45,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333785144] [2021-03-11 00:08:45,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:08:45,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:08:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:08:45,906 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:46,138 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-03-11 00:08:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:08:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:08:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:46,142 INFO L225 Difference]: With dead ends: 1508 [2021-03-11 00:08:46,142 INFO L226 Difference]: Without dead ends: 1496 [2021-03-11 00:08:46,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:08:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-03-11 00:08:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-03-11 00:08:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-03-11 00:08:46,159 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-03-11 00:08:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:46,159 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-03-11 00:08:46,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-03-11 00:08:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:46,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:46,162 INFO L519 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] [2021-03-11 00:08:46,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-11 00:08:46,375 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:46,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-03-11 00:08:46,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:46,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269680777] [2021-03-11 00:08:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:46,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269680777] [2021-03-11 00:08:46,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121388645] [2021-03-11 00:08:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:46,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:08:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:46,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:46,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:46,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785818073] [2021-03-11 00:08:46,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:46,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:46,515 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:47,008 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-03-11 00:08:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:08:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 24 [2021-03-11 00:08:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:47,013 INFO L225 Difference]: With dead ends: 2412 [2021-03-11 00:08:47,013 INFO L226 Difference]: Without dead ends: 2412 [2021-03-11 00:08:47,013 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:08:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-11 00:08:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-03-11 00:08:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-03-11 00:08:47,033 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-03-11 00:08:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:47,033 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-03-11 00:08:47,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-03-11 00:08:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:47,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:47,036 INFO L519 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] [2021-03-11 00:08:47,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-11 00:08:47,243 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:47,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-03-11 00:08:47,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:47,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947074910] [2021-03-11 00:08:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947074910] [2021-03-11 00:08:47,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244834599] [2021-03-11 00:08:47,282 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:47,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:47,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:47,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:47,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936933939] [2021-03-11 00:08:47,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:47,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:47,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:47,380 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:47,849 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-03-11 00:08:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:08:47,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 24 [2021-03-11 00:08:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:47,854 INFO L225 Difference]: With dead ends: 2335 [2021-03-11 00:08:47,854 INFO L226 Difference]: Without dead ends: 2335 [2021-03-11 00:08:47,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:08:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-03-11 00:08:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-03-11 00:08:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:08:47,885 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:08:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:47,885 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:08:47,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-03-11 00:08:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:08:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:47,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:47,888 INFO L519 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] [2021-03-11 00:08:48,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-11 00:08:48,107 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:48,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-03-11 00:08:48,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:48,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570184001] [2021-03-11 00:08:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:48,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570184001] [2021-03-11 00:08:48,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676151194] [2021-03-11 00:08:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:48,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:48,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:48,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:48,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:48,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:08:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528989030] [2021-03-11 00:08:48,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:08:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:08:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:08:48,250 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:48,669 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-03-11 00:08:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:08:48,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-03-11 00:08:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:48,674 INFO L225 Difference]: With dead ends: 2285 [2021-03-11 00:08:48,674 INFO L226 Difference]: Without dead ends: 2285 [2021-03-11 00:08:48,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:08:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-03-11 00:08:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-03-11 00:08:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:08:48,694 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:08:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:48,694 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:08:48,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:08:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:48,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:48,696 INFO L519 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] [2021-03-11 00:08:48,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-11 00:08:48,896 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-03-11 00:08:48,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:48,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491441865] [2021-03-11 00:08:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:48,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491441865] [2021-03-11 00:08:48,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66519626] [2021-03-11 00:08:48,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:48,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:08:48,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:48,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:48,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:49,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:49,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:08:49,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066237606] [2021-03-11 00:08:49,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:08:49,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:49,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:08:49,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:08:49,045 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:49,417 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-03-11 00:08:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:08:49,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-03-11 00:08:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:49,421 INFO L225 Difference]: With dead ends: 2176 [2021-03-11 00:08:49,421 INFO L226 Difference]: Without dead ends: 2172 [2021-03-11 00:08:49,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:08:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-11 00:08:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-03-11 00:08:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:08:49,440 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:08:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:49,440 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:08:49,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:08:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:49,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:49,442 INFO L519 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] [2021-03-11 00:08:49,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:49,643 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-03-11 00:08:49,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:49,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996369254] [2021-03-11 00:08:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:49,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996369254] [2021-03-11 00:08:49,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341860234] [2021-03-11 00:08:49,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:08:49,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:49,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:49,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:49,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:49,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843496078] [2021-03-11 00:08:49,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:49,800 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:50,248 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-03-11 00:08:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:08:50,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-03-11 00:08:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:50,252 INFO L225 Difference]: With dead ends: 2199 [2021-03-11 00:08:50,252 INFO L226 Difference]: Without dead ends: 2199 [2021-03-11 00:08:50,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:08:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-11 00:08:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-03-11 00:08:50,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:08:50,274 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:08:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:50,274 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:08:50,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:08:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:50,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:50,276 INFO L519 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] [2021-03-11 00:08:50,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:50,476 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-03-11 00:08:50,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:50,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397336076] [2021-03-11 00:08:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397336076] [2021-03-11 00:08:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97372448] [2021-03-11 00:08:50,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:50,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:08:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:50,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:50,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:50,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298254661] [2021-03-11 00:08:50,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:50,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:50,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:50,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:50,633 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:51,009 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-03-11 00:08:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:08:51,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-03-11 00:08:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:51,013 INFO L225 Difference]: With dead ends: 2156 [2021-03-11 00:08:51,013 INFO L226 Difference]: Without dead ends: 2152 [2021-03-11 00:08:51,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:08:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-03-11 00:08:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-03-11 00:08:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:08:51,039 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:08:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:51,039 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:08:51,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:08:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:51,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:51,042 INFO L519 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] [2021-03-11 00:08:51,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-11 00:08:51,265 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-03-11 00:08:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:51,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683925049] [2021-03-11 00:08:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:51,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683925049] [2021-03-11 00:08:51,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790324535] [2021-03-11 00:08:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:51,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:08:51,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:51,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:51,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:51,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:08:51,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492146491] [2021-03-11 00:08:51,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:08:51,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:51,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:08:51,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:08:51,424 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:51,794 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-03-11 00:08:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:08:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-03-11 00:08:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:51,798 INFO L225 Difference]: With dead ends: 2097 [2021-03-11 00:08:51,798 INFO L226 Difference]: Without dead ends: 2097 [2021-03-11 00:08:51,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:08:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-11 00:08:51,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-03-11 00:08:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-03-11 00:08:51,827 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-03-11 00:08:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:51,829 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-03-11 00:08:51,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-03-11 00:08:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:51,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:51,832 INFO L519 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] [2021-03-11 00:08:52,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:52,055 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:52,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:52,055 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-03-11 00:08:52,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:52,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421756499] [2021-03-11 00:08:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:52,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421756499] [2021-03-11 00:08:52,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284832686] [2021-03-11 00:08:52,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:52,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:52,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:52,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:08:52,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600715148] [2021-03-11 00:08:52,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:08:52,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:52,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:08:52,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:08:52,192 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:52,463 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-03-11 00:08:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:08:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-03-11 00:08:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:52,467 INFO L225 Difference]: With dead ends: 1963 [2021-03-11 00:08:52,467 INFO L226 Difference]: Without dead ends: 1959 [2021-03-11 00:08:52,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:08:52,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-03-11 00:08:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-03-11 00:08:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-03-11 00:08:52,486 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-03-11 00:08:52,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:52,486 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-03-11 00:08:52,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-03-11 00:08:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:52,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:52,488 INFO L519 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] [2021-03-11 00:08:52,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-11 00:08:52,688 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:52,689 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-03-11 00:08:52,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:52,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977962165] [2021-03-11 00:08:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:52,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977962165] [2021-03-11 00:08:52,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138151818] [2021-03-11 00:08:52,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:52,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:52,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:52,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:52,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:52,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:52,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:08:52,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668201304] [2021-03-11 00:08:52,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:08:52,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:52,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:08:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:08:52,811 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:53,101 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-03-11 00:08:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:08:53,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-03-11 00:08:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:53,103 INFO L225 Difference]: With dead ends: 1728 [2021-03-11 00:08:53,103 INFO L226 Difference]: Without dead ends: 1716 [2021-03-11 00:08:53,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:08:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-03-11 00:08:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-03-11 00:08:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-03-11 00:08:53,121 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-03-11 00:08:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:53,122 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-03-11 00:08:53,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-03-11 00:08:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:53,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:53,124 INFO L519 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] [2021-03-11 00:08:53,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:53,339 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-03-11 00:08:53,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:53,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797019231] [2021-03-11 00:08:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:53,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797019231] [2021-03-11 00:08:53,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670322086] [2021-03-11 00:08:53,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:53,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:08:53,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:53,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:53,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:53,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:53,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032377239] [2021-03-11 00:08:53,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:53,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:53,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:53,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:53,488 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:53,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:53,816 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-03-11 00:08:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:08:53,817 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-03-11 00:08:53,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:53,819 INFO L225 Difference]: With dead ends: 1821 [2021-03-11 00:08:53,819 INFO L226 Difference]: Without dead ends: 1821 [2021-03-11 00:08:53,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:08:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-11 00:08:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-03-11 00:08:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-03-11 00:08:53,836 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-03-11 00:08:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:53,836 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-03-11 00:08:53,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-03-11 00:08:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:53,838 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:53,838 INFO L519 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] [2021-03-11 00:08:54,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-11 00:08:54,039 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:54,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-03-11 00:08:54,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:54,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887064404] [2021-03-11 00:08:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:54,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887064404] [2021-03-11 00:08:54,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080231625] [2021-03-11 00:08:54,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:54,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:54,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:54,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:54,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:54,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:54,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:08:54,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392509739] [2021-03-11 00:08:54,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:08:54,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:54,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:08:54,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:08:54,177 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:54,437 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-03-11 00:08:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:08:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-03-11 00:08:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:54,440 INFO L225 Difference]: With dead ends: 1790 [2021-03-11 00:08:54,440 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:08:54,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:08:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:08:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-03-11 00:08:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-03-11 00:08:54,458 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-03-11 00:08:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:54,458 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-03-11 00:08:54,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-03-11 00:08:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:08:54,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:54,461 INFO L519 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] [2021-03-11 00:08:54,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-11 00:08:54,675 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-03-11 00:08:54,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:54,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563748732] [2021-03-11 00:08:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563748732] [2021-03-11 00:08:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473968525] [2021-03-11 00:08:54,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:08:54,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:08:54,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:08:54,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:54,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:54,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:08:54,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240196354] [2021-03-11 00:08:54,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:08:54,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:54,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:08:54,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:08:54,806 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:55,007 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-03-11 00:08:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:08:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-03-11 00:08:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:55,011 INFO L225 Difference]: With dead ends: 1649 [2021-03-11 00:08:55,011 INFO L226 Difference]: Without dead ends: 1637 [2021-03-11 00:08:55,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:08:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-03-11 00:08:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-03-11 00:08:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-03-11 00:08:55,034 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-03-11 00:08:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:55,034 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-03-11 00:08:55,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-03-11 00:08:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:55,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:55,036 INFO L519 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] [2021-03-11 00:08:55,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-11 00:08:55,251 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:55,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-03-11 00:08:55,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:55,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766735761] [2021-03-11 00:08:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:55,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766735761] [2021-03-11 00:08:55,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299930162] [2021-03-11 00:08:55,631 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 [2021-03-11 00:08:55,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:55,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:55,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:08:55,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:56,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:56,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:08:56,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:56,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:08:56,219 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:56,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:56,237 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:08:56,248 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:56,256 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:08:56,263 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:08:56,270 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:56,279 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:56,287 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:08:56,295 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:56,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:56,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:08:56,300 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:56,325 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-03-11 00:08:56,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:08:56,326 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-03-11 00:08:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:56,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:56,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:08:56,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102647986] [2021-03-11 00:08:56,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:08:56,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:56,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:08:56,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:08:56,352 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:57,143 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-03-11 00:08:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:08:57,143 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:57,146 INFO L225 Difference]: With dead ends: 1531 [2021-03-11 00:08:57,146 INFO L226 Difference]: Without dead ends: 1516 [2021-03-11 00:08:57,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1010.4ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:08:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-03-11 00:08:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-03-11 00:08:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-03-11 00:08:57,188 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-03-11 00:08:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:57,199 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-03-11 00:08:57,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-03-11 00:08:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:57,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:57,202 INFO L519 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] [2021-03-11 00:08:57,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-11 00:08:57,415 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:57,416 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-03-11 00:08:57,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:57,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520349674] [2021-03-11 00:08:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:57,668 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-11 00:08:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:57,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520349674] [2021-03-11 00:08:57,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796348174] [2021-03-11 00:08:57,979 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 [2021-03-11 00:08:58,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:08:58,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:08:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:58,420 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-11 00:08:58,472 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_3, v_prenex_5]} [2021-03-11 00:08:58,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:58,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:08:58,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:58,615 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:08:58,615 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-03-11 00:08:58,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:58,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:58,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:08:58,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:58,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:58,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:58,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:58,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:58,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:08:58,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:58,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:58,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:08:58,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:58,720 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-03-11 00:08:58,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:08:58,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-03-11 00:08:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:58,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:58,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:08:58,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885814047] [2021-03-11 00:08:58,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:08:58,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:58,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:08:58,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:08:58,762 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:59,540 INFO L93 Difference]: Finished difference Result 1548 states and 5036 transitions. [2021-03-11 00:08:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:08:59,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:59,543 INFO L225 Difference]: With dead ends: 1548 [2021-03-11 00:08:59,543 INFO L226 Difference]: Without dead ends: 1518 [2021-03-11 00:08:59,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1255.5ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:08:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-03-11 00:08:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1168. [2021-03-11 00:08:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.348757497857755) internal successors, (3908), 1167 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3908 transitions. [2021-03-11 00:08:59,561 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3908 transitions. Word has length 26 [2021-03-11 00:08:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:59,561 INFO L480 AbstractCegarLoop]: Abstraction has 1168 states and 3908 transitions. [2021-03-11 00:08:59,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3908 transitions. [2021-03-11 00:08:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:59,564 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:59,564 INFO L519 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] [2021-03-11 00:08:59,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:59,765 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:59,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-03-11 00:08:59,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:59,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277501915] [2021-03-11 00:08:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:00,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277501915] [2021-03-11 00:09:00,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904202117] [2021-03-11 00:09:00,267 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:00,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:00,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:00,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:00,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:00,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:00,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:00,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:00,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:09:00,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:01,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:09:01,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:01,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:01,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:09:01,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:09:01,066 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:09:01,076 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:09:01,086 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:09:01,094 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:09:01,103 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:09:01,127 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:01,138 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:09:01,149 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:01,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:09:01,155 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,182 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-03-11 00:09:01,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:09:01,183 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:09:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:01,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:01,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:09:01,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718529762] [2021-03-11 00:09:01,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:01,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:01,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:01,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:01,216 INFO L87 Difference]: Start difference. First operand 1168 states and 3908 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:02,535 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2021-03-11 00:09:02,971 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-03-11 00:09:03,156 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2021-03-11 00:09:03,470 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-03-11 00:09:03,691 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-03-11 00:09:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:03,768 INFO L93 Difference]: Finished difference Result 1668 states and 5372 transitions. [2021-03-11 00:09:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:09:03,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:03,771 INFO L225 Difference]: With dead ends: 1668 [2021-03-11 00:09:03,771 INFO L226 Difference]: Without dead ends: 1653 [2021-03-11 00:09:03,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2631.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:09:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-03-11 00:09:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1198. [2021-03-11 00:09:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.3333333333333335) internal successors, (3990), 1197 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3990 transitions. [2021-03-11 00:09:03,788 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3990 transitions. Word has length 26 [2021-03-11 00:09:03,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:03,788 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 3990 transitions. [2021-03-11 00:09:03,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3990 transitions. [2021-03-11 00:09:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:03,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:03,790 INFO L519 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] [2021-03-11 00:09:03,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-11 00:09:04,000 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-03-11 00:09:04,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:04,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375698093] [2021-03-11 00:09:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:04,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375698093] [2021-03-11 00:09:04,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522050968] [2021-03-11 00:09:04,429 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:04,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:04,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:04,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:04,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:04,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-03-11 00:09:04,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,777 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:04,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:04,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,792 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:09:04,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:04,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:04,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,835 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:09:04,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:04,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:09:04,853 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,867 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:04,875 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:04,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,900 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:09:04,901 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,910 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:04,911 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,920 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:09:04,921 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,934 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:04,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-03-11 00:09:04,935 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,947 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:04,949 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,963 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:04,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:09:04,965 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,977 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:04,979 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:04,988 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:04,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:09:04,989 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:05,066 INFO L628 ElimStorePlain]: treesize reduction 38, result has 67.2 percent of original size [2021-03-11 00:09:05,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:09:05,067 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-03-11 00:09:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:05,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:05,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:09:05,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121112119] [2021-03-11 00:09:05,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:05,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:05,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:05,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:05,176 INFO L87 Difference]: Start difference. First operand 1198 states and 3990 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:06,127 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-11 00:09:06,725 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-03-11 00:09:06,919 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-03-11 00:09:07,230 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-03-11 00:09:07,383 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-11 00:09:07,855 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-11 00:09:08,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:08,228 INFO L93 Difference]: Finished difference Result 2109 states and 6599 transitions. [2021-03-11 00:09:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:09:08,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:08,231 INFO L225 Difference]: With dead ends: 2109 [2021-03-11 00:09:08,231 INFO L226 Difference]: Without dead ends: 2064 [2021-03-11 00:09:08,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2846.6ms TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:09:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-03-11 00:09:08,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1216. [2021-03-11 00:09:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.3390946502057615) internal successors, (4057), 1215 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4057 transitions. [2021-03-11 00:09:08,249 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4057 transitions. Word has length 26 [2021-03-11 00:09:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:08,249 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 4057 transitions. [2021-03-11 00:09:08,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4057 transitions. [2021-03-11 00:09:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:08,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:08,251 INFO L519 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] [2021-03-11 00:09:08,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:08,452 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:08,452 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-03-11 00:09:08,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:08,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810627848] [2021-03-11 00:09:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:08,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810627848] [2021-03-11 00:09:08,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603144493] [2021-03-11 00:09:08,927 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 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 [2021-03-11 00:09:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:08,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:08,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:09,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:09,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:09:09,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:09:09,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:09:09,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:09,674 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:09:09,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:09:09,698 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:09:09,708 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:09:09,719 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:09:09,732 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:09:09,743 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:09:09,754 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:09,766 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:09,776 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:09,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:09:09,782 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,807 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-03-11 00:09:09,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:09:09,809 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:09:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:09,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:09,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:09:09,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535788661] [2021-03-11 00:09:09,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:09,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:09,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:09,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:09,842 INFO L87 Difference]: Start difference. First operand 1216 states and 4057 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:11,278 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-03-11 00:09:11,414 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-03-11 00:09:11,758 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-03-11 00:09:11,934 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-03-11 00:09:12,295 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2021-03-11 00:09:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:12,953 INFO L93 Difference]: Finished difference Result 1905 states and 6066 transitions. [2021-03-11 00:09:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:09:12,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:12,957 INFO L225 Difference]: With dead ends: 1905 [2021-03-11 00:09:12,957 INFO L226 Difference]: Without dead ends: 1890 [2021-03-11 00:09:12,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3037.0ms TimeCoverageRelationStatistics Valid=433, Invalid=1919, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:09:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-03-11 00:09:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1227. [2021-03-11 00:09:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 3.3450244698205545) internal successors, (4101), 1226 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4101 transitions. [2021-03-11 00:09:12,974 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4101 transitions. Word has length 26 [2021-03-11 00:09:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:12,974 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 4101 transitions. [2021-03-11 00:09:12,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4101 transitions. [2021-03-11 00:09:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:12,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:12,976 INFO L519 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] [2021-03-11 00:09:13,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:13,176 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:13,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-03-11 00:09:13,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:13,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611381496] [2021-03-11 00:09:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:13,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611381496] [2021-03-11 00:09:13,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320184603] [2021-03-11 00:09:13,582 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:13,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:13,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:13,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:13,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:14,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:14,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-03-11 00:09:14,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,351 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:09:14,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 33 [2021-03-11 00:09:14,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,383 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:09:14,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-03-11 00:09:14,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,435 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:09:14,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-03-11 00:09:14,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,469 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-03-11 00:09:14,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:14,471 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,497 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-03-11 00:09:14,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-03-11 00:09:14,498 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,515 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:09:14,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:09:14,516 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,532 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:09:14,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:09:14,533 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,549 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:09:14,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:09:14,550 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,577 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-03-11 00:09:14,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-03-11 00:09:14,579 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,595 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:09:14,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:09:14,596 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,623 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-03-11 00:09:14,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-03-11 00:09:14,625 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,641 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:09:14,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:09:14,642 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,671 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-03-11 00:09:14,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-03-11 00:09:14,673 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,693 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:09:14,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:09:14,694 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:14,707 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:09:14,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:09:14,708 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:14,846 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-11 00:09:14,846 INFO L628 ElimStorePlain]: treesize reduction 119, result has 49.8 percent of original size [2021-03-11 00:09:14,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:09:14,849 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:133 [2021-03-11 00:09:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:15,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:15,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-11 00:09:15,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586397087] [2021-03-11 00:09:15,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:09:15,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:15,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:09:15,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:09:15,012 INFO L87 Difference]: Start difference. First operand 1227 states and 4101 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:16,554 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-11 00:09:16,904 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2021-03-11 00:09:17,036 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-03-11 00:09:17,337 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-03-11 00:09:17,730 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-03-11 00:09:17,967 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-11 00:09:18,207 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-11 00:09:18,493 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-03-11 00:09:18,640 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-03-11 00:09:18,824 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-11 00:09:18,995 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-11 00:09:19,137 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-03-11 00:09:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:19,239 INFO L93 Difference]: Finished difference Result 2510 states and 7726 transitions. [2021-03-11 00:09:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:09:19,239 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:19,244 INFO L225 Difference]: With dead ends: 2510 [2021-03-11 00:09:19,244 INFO L226 Difference]: Without dead ends: 2465 [2021-03-11 00:09:19,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 4124.9ms TimeCoverageRelationStatistics Valid=542, Invalid=3240, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:09:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-03-11 00:09:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1399. [2021-03-11 00:09:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.3125894134477827) internal successors, (4631), 1398 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4631 transitions. [2021-03-11 00:09:19,277 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4631 transitions. Word has length 26 [2021-03-11 00:09:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:19,277 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 4631 transitions. [2021-03-11 00:09:19,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4631 transitions. [2021-03-11 00:09:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:19,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:19,279 INFO L519 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] [2021-03-11 00:09:19,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-03-11 00:09:19,480 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-03-11 00:09:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:19,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325923455] [2021-03-11 00:09:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:19,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325923455] [2021-03-11 00:09:19,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77185944] [2021-03-11 00:09:19,907 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) [2021-03-11 00:09:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:19,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:09:19,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:20,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:20,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:09:20,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:20,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:09:20,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:20,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:20,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:20,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:20,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:20,508 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:09:20,515 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:20,523 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:20,532 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:20,538 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:20,545 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:20,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:20,550 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,572 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-03-11 00:09:20,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:09:20,573 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-03-11 00:09:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:20,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:20,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:09:20,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129512270] [2021-03-11 00:09:20,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:20,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:20,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:20,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:20,601 INFO L87 Difference]: Start difference. First operand 1399 states and 4631 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:21,162 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-11 00:09:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:21,640 INFO L93 Difference]: Finished difference Result 1804 states and 5851 transitions. [2021-03-11 00:09:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:09:21,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:21,645 INFO L225 Difference]: With dead ends: 1804 [2021-03-11 00:09:21,645 INFO L226 Difference]: Without dead ends: 1789 [2021-03-11 00:09:21,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1256.3ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:09:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-03-11 00:09:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1410. [2021-03-11 00:09:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.3101490418736694) internal successors, (4664), 1409 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4664 transitions. [2021-03-11 00:09:21,665 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4664 transitions. Word has length 26 [2021-03-11 00:09:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:21,665 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 4664 transitions. [2021-03-11 00:09:21,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4664 transitions. [2021-03-11 00:09:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:21,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:21,667 INFO L519 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] [2021-03-11 00:09:21,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:21,868 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-03-11 00:09:21,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:21,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609442768] [2021-03-11 00:09:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:22,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609442768] [2021-03-11 00:09:22,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251182158] [2021-03-11 00:09:22,323 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 [2021-03-11 00:09:22,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:22,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:22,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:22,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:22,743 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:09:23,071 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_9, v_prenex_21, v_prenex_13, v_prenex_23, v_prenex_11, v_prenex_17, v_prenex_28, v_prenex_15, v_prenex_26], 3=[v_prenex_19, v_prenex_7]} [2021-03-11 00:09:23,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:23,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:09:23,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:23,504 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 155 [2021-03-11 00:09:23,505 INFO L628 ElimStorePlain]: treesize reduction 117, result has 78.3 percent of original size [2021-03-11 00:09:23,530 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:23,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:23,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:23,702 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-03-11 00:09:23,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:23,728 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:23,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:09:23,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:23,904 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-03-11 00:09:23,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:23,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:23,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:09:23,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:24,163 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-03-11 00:09:24,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:24,164 INFO L518 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2021-03-11 00:09:24,164 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-03-11 00:09:24,186 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:09:24,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:24,359 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-03-11 00:09:24,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:24,384 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:24,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:24,385 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:24,551 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-03-11 00:09:24,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:24,577 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:24,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:09:24,581 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:24,752 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-11 00:09:24,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:24,775 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:09:24,792 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:24,956 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-11 00:09:24,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:24,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:24,981 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:09:24,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-03-11 00:09:25,000 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:25,155 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-11 00:09:25,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:25,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:25,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:25,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-03-11 00:09:25,189 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:25,332 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-11 00:09:25,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:25,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-11 00:09:25,366 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:545, output treesize:487 [2021-03-11 00:09:25,604 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-03-11 00:09:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:25,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:25,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:09:25,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339615027] [2021-03-11 00:09:25,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:09:25,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:25,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:09:25,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:09:25,781 INFO L87 Difference]: Start difference. First operand 1410 states and 4664 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:26,033 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 26 [2021-03-11 00:09:26,461 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:09:27,077 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-03-11 00:09:27,255 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-03-11 00:09:27,598 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2021-03-11 00:09:27,986 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-11 00:09:28,172 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:09:28,379 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-11 00:09:28,847 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-03-11 00:09:29,487 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 83 [2021-03-11 00:09:29,796 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-03-11 00:09:30,098 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-11 00:09:30,758 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2021-03-11 00:09:31,145 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-03-11 00:09:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:31,233 INFO L93 Difference]: Finished difference Result 2170 states and 6841 transitions. [2021-03-11 00:09:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:09:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:31,238 INFO L225 Difference]: With dead ends: 2170 [2021-03-11 00:09:31,238 INFO L226 Difference]: Without dead ends: 2155 [2021-03-11 00:09:31,238 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 5605.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:09:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-03-11 00:09:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1429. [2021-03-11 00:09:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.3144257703081235) internal successors, (4733), 1428 states have internal predecessors, (4733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4733 transitions. [2021-03-11 00:09:31,260 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4733 transitions. Word has length 26 [2021-03-11 00:09:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:31,260 INFO L480 AbstractCegarLoop]: Abstraction has 1429 states and 4733 transitions. [2021-03-11 00:09:31,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4733 transitions. [2021-03-11 00:09:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:31,263 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:31,263 INFO L519 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] [2021-03-11 00:09:31,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-03-11 00:09:31,463 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:31,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-03-11 00:09:31,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:31,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339080451] [2021-03-11 00:09:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:31,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339080451] [2021-03-11 00:09:31,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752392305] [2021-03-11 00:09:31,772 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 [2021-03-11 00:09:31,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:31,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:09:31,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:32,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:32,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:32,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:32,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:32,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:32,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:32,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:09:32,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:32,574 INFO L628 ElimStorePlain]: treesize reduction 125, result has 41.3 percent of original size [2021-03-11 00:09:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:32,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:09:32,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:32,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:32,622 INFO L518 ElimStorePlain]: Eliminatee v_prenex_36 vanished before elimination [2021-03-11 00:09:32,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:32,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:32,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:09:32,629 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:32,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:32,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:09:32,663 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-03-11 00:09:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:32,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:32,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:09:32,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462338328] [2021-03-11 00:09:32,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:32,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:32,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:32,700 INFO L87 Difference]: Start difference. First operand 1429 states and 4733 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:33,419 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-03-11 00:09:33,717 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-11 00:09:33,910 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-03-11 00:09:34,290 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-03-11 00:09:34,479 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-03-11 00:09:34,784 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-03-11 00:09:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:34,906 INFO L93 Difference]: Finished difference Result 2255 states and 7195 transitions. [2021-03-11 00:09:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:09:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:34,910 INFO L225 Difference]: With dead ends: 2255 [2021-03-11 00:09:34,910 INFO L226 Difference]: Without dead ends: 2225 [2021-03-11 00:09:34,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2357.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:09:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-03-11 00:09:34,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1459. [2021-03-11 00:09:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.324417009602195) internal successors, (4847), 1458 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4847 transitions. [2021-03-11 00:09:34,932 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4847 transitions. Word has length 26 [2021-03-11 00:09:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:34,932 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 4847 transitions. [2021-03-11 00:09:34,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4847 transitions. [2021-03-11 00:09:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:34,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:34,934 INFO L519 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] [2021-03-11 00:09:35,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:35,135 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:35,135 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-03-11 00:09:35,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:35,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024655758] [2021-03-11 00:09:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:35,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024655758] [2021-03-11 00:09:35,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163409903] [2021-03-11 00:09:35,528 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) [2021-03-11 00:09:35,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:35,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:09:36,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:36,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:09:36,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:36,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:36,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:36,066 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:09:36,073 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:36,079 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:36,086 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:36,092 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:36,098 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:36,104 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:36,110 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:36,115 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:36,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:36,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:36,119 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:36,141 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-03-11 00:09:36,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:09:36,142 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-03-11 00:09:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:36,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:36,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:09:36,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948565600] [2021-03-11 00:09:36,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:09:36,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:36,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:09:36,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:09:36,175 INFO L87 Difference]: Start difference. First operand 1459 states and 4847 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-03-11 00:09:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:36,759 INFO L93 Difference]: Finished difference Result 1832 states and 5996 transitions. [2021-03-11 00:09:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:09:36,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 26 [2021-03-11 00:09:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:36,763 INFO L225 Difference]: With dead ends: 1832 [2021-03-11 00:09:36,763 INFO L226 Difference]: Without dead ends: 1817 [2021-03-11 00:09:36,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 908.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:09:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-03-11 00:09:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1468. [2021-03-11 00:09:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3285616905248805) internal successors, (4883), 1467 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4883 transitions. [2021-03-11 00:09:36,792 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4883 transitions. Word has length 26 [2021-03-11 00:09:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:36,793 INFO L480 AbstractCegarLoop]: Abstraction has 1468 states and 4883 transitions. [2021-03-11 00:09:36,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-03-11 00:09:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4883 transitions. [2021-03-11 00:09:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:36,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:36,795 INFO L519 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] [2021-03-11 00:09:36,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-03-11 00:09:36,995 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-03-11 00:09:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:36,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241010448] [2021-03-11 00:09:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:37,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241010448] [2021-03-11 00:09:37,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920973722] [2021-03-11 00:09:37,346 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 [2021-03-11 00:09:37,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:09:37,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:37,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:09:37,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:37,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:37,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:09:37,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,922 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:37,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:09:37,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:38,074 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:09:38,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:38,101 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:38,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:09:38,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:38,123 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:38,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:09:38,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:38,270 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:09:38,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:38,295 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:38,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:09:38,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:38,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:38,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:38,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:09:38,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:38,453 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:09:38,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:38,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:38,478 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:38,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:09:38,480 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:38,498 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:38,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:38,499 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:38,639 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:09:38,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:38,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:38,657 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:221 [2021-03-11 00:09:38,793 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-11 00:09:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:38,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:38,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:09:38,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130644115] [2021-03-11 00:09:38,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:38,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:38,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:38,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:38,835 INFO L87 Difference]: Start difference. First operand 1468 states and 4883 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:39,169 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-11 00:09:39,372 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 27 [2021-03-11 00:09:39,701 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-03-11 00:09:39,982 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-11 00:09:40,166 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-11 00:09:40,366 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-03-11 00:09:40,827 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2021-03-11 00:09:41,024 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-03-11 00:09:41,282 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-03-11 00:09:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:41,461 INFO L93 Difference]: Finished difference Result 2776 states and 8807 transitions. [2021-03-11 00:09:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:09:41,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:41,465 INFO L225 Difference]: With dead ends: 2776 [2021-03-11 00:09:41,465 INFO L226 Difference]: Without dead ends: 2746 [2021-03-11 00:09:41,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2855.4ms TimeCoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:09:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-03-11 00:09:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1460. [2021-03-11 00:09:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.3262508567511992) internal successors, (4853), 1459 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4853 transitions. [2021-03-11 00:09:41,487 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4853 transitions. Word has length 26 [2021-03-11 00:09:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:41,487 INFO L480 AbstractCegarLoop]: Abstraction has 1460 states and 4853 transitions. [2021-03-11 00:09:41,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4853 transitions. [2021-03-11 00:09:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:41,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:41,489 INFO L519 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] [2021-03-11 00:09:41,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:41,690 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 12 times [2021-03-11 00:09:41,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:41,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350567324] [2021-03-11 00:09:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:42,015 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-11 00:09:42,144 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-11 00:09:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:42,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350567324] [2021-03-11 00:09:42,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074924947] [2021-03-11 00:09:42,250 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 [2021-03-11 00:09:42,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:42,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:42,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,585 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:42,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:09:42,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:42,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-03-11 00:09:42,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:42,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-03-11 00:09:42,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,653 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:42,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,671 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:42,672 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,690 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:42,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:09:42,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,720 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:09:42,720 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,733 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:09:42,734 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,748 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:09:42,748 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,761 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:09:42,762 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,774 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:42,775 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,788 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:09:42,789 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:42,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-03-11 00:09:42,808 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:09:42,821 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-03-11 00:09:42,833 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:42,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:42,841 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,919 INFO L628 ElimStorePlain]: treesize reduction 57, result has 57.5 percent of original size [2021-03-11 00:09:42,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:09:42,921 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:77 [2021-03-11 00:09:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:43,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:43,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:09:43,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270588896] [2021-03-11 00:09:43,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:43,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:43,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:43,023 INFO L87 Difference]: Start difference. First operand 1460 states and 4853 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:43,667 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-11 00:09:43,998 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-11 00:09:44,148 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-11 00:09:44,390 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:09:44,778 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-11 00:09:45,246 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-11 00:09:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:45,584 INFO L93 Difference]: Finished difference Result 2128 states and 6867 transitions. [2021-03-11 00:09:45,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:09:45,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:45,588 INFO L225 Difference]: With dead ends: 2128 [2021-03-11 00:09:45,588 INFO L226 Difference]: Without dead ends: 2098 [2021-03-11 00:09:45,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2722.1ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:09:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-03-11 00:09:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1469. [2021-03-11 00:09:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.332425068119891) internal successors, (4892), 1468 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 4892 transitions. [2021-03-11 00:09:45,608 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 4892 transitions. Word has length 26 [2021-03-11 00:09:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:45,608 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 4892 transitions. [2021-03-11 00:09:45,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 4892 transitions. [2021-03-11 00:09:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:45,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:45,610 INFO L519 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] [2021-03-11 00:09:45,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:45,810 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:45,811 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-03-11 00:09:45,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:45,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576099645] [2021-03-11 00:09:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:46,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576099645] [2021-03-11 00:09:46,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039025766] [2021-03-11 00:09:46,154 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:46,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:46,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:46,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:09:46,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:46,558 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:09:47,332 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_68], 6=[v_prenex_64, v_prenex_66]} [2021-03-11 00:09:47,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:47,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:47,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:47,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:47,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:47,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:47,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:47,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:09:47,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:47,489 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-03-11 00:09:47,489 INFO L628 ElimStorePlain]: treesize reduction 146, result has 42.7 percent of original size [2021-03-11 00:09:47,490 INFO L518 ElimStorePlain]: Eliminatee v_prenex_68 vanished before elimination [2021-03-11 00:09:47,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:47,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:47,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:09:47,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:47,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:47,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:47,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:47,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:47,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:09:47,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:47,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:47,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:09:47,580 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:314, output treesize:24 [2021-03-11 00:09:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:47,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:47,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:09:47,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332185704] [2021-03-11 00:09:47,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:09:47,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:47,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:09:47,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:09:47,628 INFO L87 Difference]: Start difference. First operand 1469 states and 4892 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:48,209 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-03-11 00:09:48,797 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-03-11 00:09:49,131 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-03-11 00:09:49,624 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-03-11 00:09:49,966 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-03-11 00:09:50,242 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2021-03-11 00:09:50,966 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-03-11 00:09:51,126 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:09:51,937 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 79 [2021-03-11 00:09:52,093 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:09:52,274 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-11 00:09:53,026 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 122 [2021-03-11 00:09:53,435 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 90 [2021-03-11 00:09:54,079 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 85 [2021-03-11 00:09:54,508 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 74 [2021-03-11 00:09:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:54,827 INFO L93 Difference]: Finished difference Result 3830 states and 11792 transitions. [2021-03-11 00:09:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:09:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:54,834 INFO L225 Difference]: With dead ends: 3830 [2021-03-11 00:09:54,834 INFO L226 Difference]: Without dead ends: 3680 [2021-03-11 00:09:54,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 6710.9ms TimeCoverageRelationStatistics Valid=761, Invalid=3661, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:09:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-03-11 00:09:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 1538. [2021-03-11 00:09:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3376707872478857) internal successors, (5130), 1537 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5130 transitions. [2021-03-11 00:09:54,864 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5130 transitions. Word has length 26 [2021-03-11 00:09:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:54,864 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 5130 transitions. [2021-03-11 00:09:54,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5130 transitions. [2021-03-11 00:09:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:54,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:54,867 INFO L519 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] [2021-03-11 00:09:55,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-03-11 00:09:55,067 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:55,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-03-11 00:09:55,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:55,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528300437] [2021-03-11 00:09:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:55,370 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:09:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:55,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528300437] [2021-03-11 00:09:55,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205678216] [2021-03-11 00:09:55,472 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:55,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:55,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:55,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:55,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:56,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:09:56,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:09:56,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:56,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:09:56,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:56,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:56,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:09:56,291 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:09:56,304 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:09:56,315 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:09:56,327 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:09:56,340 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:09:56,353 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:09:56,365 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:09:56,376 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:56,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:56,383 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,413 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-03-11 00:09:56,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:09:56,415 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:09:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:56,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:56,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:09:56,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219297106] [2021-03-11 00:09:56,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:09:56,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:56,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:09:56,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:09:56,461 INFO L87 Difference]: Start difference. First operand 1538 states and 5130 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:57,054 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-11 00:09:57,571 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-03-11 00:09:57,698 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-11 00:09:58,215 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-03-11 00:09:58,559 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-11 00:09:58,946 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-03-11 00:09:59,286 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-11 00:09:59,775 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-11 00:09:59,929 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-03-11 00:10:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:00,172 INFO L93 Difference]: Finished difference Result 3160 states and 10007 transitions. [2021-03-11 00:10:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:10:00,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:00,178 INFO L225 Difference]: With dead ends: 3160 [2021-03-11 00:10:00,178 INFO L226 Difference]: Without dead ends: 3073 [2021-03-11 00:10:00,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3477.9ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:10:00,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2021-03-11 00:10:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 1556. [2021-03-11 00:10:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.34983922829582) internal successors, (5209), 1555 states have internal predecessors, (5209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5209 transitions. [2021-03-11 00:10:00,205 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5209 transitions. Word has length 26 [2021-03-11 00:10:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:00,206 INFO L480 AbstractCegarLoop]: Abstraction has 1556 states and 5209 transitions. [2021-03-11 00:10:00,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5209 transitions. [2021-03-11 00:10:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:00,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:00,208 INFO L519 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] [2021-03-11 00:10:00,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:00,409 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-03-11 00:10:00,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:00,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649209388] [2021-03-11 00:10:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:00,774 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-11 00:10:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649209388] [2021-03-11 00:10:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828346010] [2021-03-11 00:10:00,893 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:00,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:10:00,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:00,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:00,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,529 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-11 00:10:01,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:10:01,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,567 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:10:01,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:10:01,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,598 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:01,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:10:01,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,631 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-11 00:10:01,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-03-11 00:10:01,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,665 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:10:01,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-03-11 00:10:01,667 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,689 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:01,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:10:01,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,722 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:10:01,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-03-11 00:10:01,728 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:01,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-11 00:10:01,773 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,799 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:01,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:10:01,800 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,822 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:01,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:10:01,823 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,843 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:01,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:10:01,844 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,865 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:01,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:10:01,866 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,897 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-11 00:10:01,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-03-11 00:10:01,899 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,920 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:01,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:10:01,921 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,940 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:01,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:10:01,941 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:01,953 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:01,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:10:01,954 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,062 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-11 00:10:02,062 INFO L628 ElimStorePlain]: treesize reduction 59, result has 61.2 percent of original size [2021-03-11 00:10:02,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:10:02,064 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-03-11 00:10:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:02,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:02,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:10:02,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123515113] [2021-03-11 00:10:02,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:10:02,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:02,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:10:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:10:02,165 INFO L87 Difference]: Start difference. First operand 1556 states and 5209 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:02,727 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-03-11 00:10:03,179 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-03-11 00:10:03,880 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-03-11 00:10:04,084 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-03-11 00:10:04,442 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-03-11 00:10:05,021 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-03-11 00:10:05,579 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-03-11 00:10:05,850 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-03-11 00:10:05,977 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-03-11 00:10:06,228 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-03-11 00:10:06,447 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-03-11 00:10:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:06,923 INFO L93 Difference]: Finished difference Result 3491 states and 10885 transitions. [2021-03-11 00:10:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:10:06,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:06,931 INFO L225 Difference]: With dead ends: 3491 [2021-03-11 00:10:06,931 INFO L226 Difference]: Without dead ends: 3403 [2021-03-11 00:10:06,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 4348.6ms TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:10:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-03-11 00:10:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 1566. [2021-03-11 00:10:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3552715654952077) internal successors, (5251), 1565 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5251 transitions. [2021-03-11 00:10:06,961 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5251 transitions. Word has length 26 [2021-03-11 00:10:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:06,961 INFO L480 AbstractCegarLoop]: Abstraction has 1566 states and 5251 transitions. [2021-03-11 00:10:06,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5251 transitions. [2021-03-11 00:10:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:06,964 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:06,964 INFO L519 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] [2021-03-11 00:10:07,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable830 [2021-03-11 00:10:07,164 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:07,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-03-11 00:10:07,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:07,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446161989] [2021-03-11 00:10:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:07,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446161989] [2021-03-11 00:10:07,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166293193] [2021-03-11 00:10:07,577 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:10:07,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:08,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:10:08,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:08,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:08,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:08,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:10:08,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:10:08,099 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:08,109 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:08,117 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:08,125 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:10:08,132 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:08,138 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:10:08,145 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:08,151 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:08,156 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:08,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:08,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:08,160 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:08,185 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-03-11 00:10:08,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:10:08,187 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-03-11 00:10:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:08,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:08,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:10:08,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512530243] [2021-03-11 00:10:08,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:08,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:08,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:08,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:08,216 INFO L87 Difference]: Start difference. First operand 1566 states and 5251 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:09,028 INFO L93 Difference]: Finished difference Result 1955 states and 6431 transitions. [2021-03-11 00:10:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:10:09,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:09,034 INFO L225 Difference]: With dead ends: 1955 [2021-03-11 00:10:09,034 INFO L226 Difference]: Without dead ends: 1940 [2021-03-11 00:10:09,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1055.2ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:10:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-03-11 00:10:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1574. [2021-03-11 00:10:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.3515575333757153) internal successors, (5272), 1573 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5272 transitions. [2021-03-11 00:10:09,066 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5272 transitions. Word has length 26 [2021-03-11 00:10:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:09,066 INFO L480 AbstractCegarLoop]: Abstraction has 1574 states and 5272 transitions. [2021-03-11 00:10:09,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5272 transitions. [2021-03-11 00:10:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:09,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:09,070 INFO L519 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] [2021-03-11 00:10:09,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-03-11 00:10:09,283 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:09,283 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-03-11 00:10:09,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:09,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008845148] [2021-03-11 00:10:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:09,483 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-11 00:10:09,613 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-11 00:10:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:09,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008845148] [2021-03-11 00:10:09,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380435219] [2021-03-11 00:10:09,867 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:10:09,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:10:09,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:09,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:09,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:10,355 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:10:10,726 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:10:10,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:10,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:11,118 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 149 [2021-03-11 00:10:11,119 INFO L628 ElimStorePlain]: treesize reduction 177, result has 69.8 percent of original size [2021-03-11 00:10:11,119 INFO L518 ElimStorePlain]: Eliminatee v_prenex_94 vanished before elimination [2021-03-11 00:10:11,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:11,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:10:11,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:11,352 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-03-11 00:10:11,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:11,382 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:11,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:10:11,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:11,572 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-03-11 00:10:11,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:11,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:11,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:10:11,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:11,789 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-03-11 00:10:11,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:11,829 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:10:11,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:12,017 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-03-11 00:10:12,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:12,043 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:10:12,045 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:12,230 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-11 00:10:12,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:12,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:12,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:10:12,256 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:12,435 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-03-11 00:10:12,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:12,460 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:12,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:10:12,462 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:12,636 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-11 00:10:12,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:12,664 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:12,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:10:12,666 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:12,837 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-11 00:10:12,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:12,862 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:12,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:10:12,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:13,034 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-03-11 00:10:13,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:13,074 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:13,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:10:13,080 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:13,244 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 00:10:13,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:13,245 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-03-11 00:10:13,245 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-03-11 00:10:13,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 14 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-11 00:10:13,257 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 28 variables, input treesize:631, output treesize:486 [2021-03-11 00:10:13,477 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-11 00:10:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:13,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:13,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:10:13,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589955411] [2021-03-11 00:10:13,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:10:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:13,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:10:13,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:10:13,598 INFO L87 Difference]: Start difference. First operand 1574 states and 5272 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:14,436 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-03-11 00:10:14,657 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:10:15,060 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-11 00:10:15,311 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-03-11 00:10:15,486 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:10:15,911 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-11 00:10:16,463 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-03-11 00:10:17,231 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2021-03-11 00:10:17,503 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:10:17,731 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-03-11 00:10:18,194 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-03-11 00:10:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:18,389 INFO L93 Difference]: Finished difference Result 2340 states and 7472 transitions. [2021-03-11 00:10:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:10:18,389 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:18,393 INFO L225 Difference]: With dead ends: 2340 [2021-03-11 00:10:18,393 INFO L226 Difference]: Without dead ends: 2310 [2021-03-11 00:10:18,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 5062.5ms TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:10:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-03-11 00:10:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1562. [2021-03-11 00:10:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.351057014734145) internal successors, (5231), 1561 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5231 transitions. [2021-03-11 00:10:18,417 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5231 transitions. Word has length 26 [2021-03-11 00:10:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:18,417 INFO L480 AbstractCegarLoop]: Abstraction has 1562 states and 5231 transitions. [2021-03-11 00:10:18,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5231 transitions. [2021-03-11 00:10:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:18,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:18,420 INFO L519 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] [2021-03-11 00:10:18,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:18,622 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:18,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 15 times [2021-03-11 00:10:18,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:18,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088444799] [2021-03-11 00:10:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:19,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088444799] [2021-03-11 00:10:19,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464826138] [2021-03-11 00:10:19,030 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 [2021-03-11 00:10:19,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:10:19,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:10:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:19,503 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:10:19,728 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:10:20,014 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-03-11 00:10:20,062 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_104], 2=[A, v_prenex_103]} [2021-03-11 00:10:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:20,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:10:20,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:20,224 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:10:20,225 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-03-11 00:10:20,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:20,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:20,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:10:20,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:20,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:20,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:10:20,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:20,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:20,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:20,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:20,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:20,353 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-03-11 00:10:20,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:10:20,356 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-03-11 00:10:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:20,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:20,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:10:20,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817691920] [2021-03-11 00:10:20,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:20,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:20,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:20,410 INFO L87 Difference]: Start difference. First operand 1562 states and 5231 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:21,449 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-11 00:10:21,657 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-11 00:10:22,019 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:10:22,426 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-11 00:10:22,866 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-03-11 00:10:23,259 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 51 [2021-03-11 00:10:23,932 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 63 [2021-03-11 00:10:24,229 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 51 [2021-03-11 00:10:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:24,570 INFO L93 Difference]: Finished difference Result 2452 states and 7792 transitions. [2021-03-11 00:10:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:10:24,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:24,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:24,576 INFO L225 Difference]: With dead ends: 2452 [2021-03-11 00:10:24,576 INFO L226 Difference]: Without dead ends: 2407 [2021-03-11 00:10:24,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 4165.3ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:10:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-03-11 00:10:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1571. [2021-03-11 00:10:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.3528662420382167) internal successors, (5264), 1570 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5264 transitions. [2021-03-11 00:10:24,602 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5264 transitions. Word has length 26 [2021-03-11 00:10:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:24,602 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 5264 transitions. [2021-03-11 00:10:24,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5264 transitions. [2021-03-11 00:10:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:24,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:24,605 INFO L519 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] [2021-03-11 00:10:24,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1016 [2021-03-11 00:10:24,817 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:24,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:24,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2108946275, now seen corresponding path program 16 times [2021-03-11 00:10:24,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:24,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325851925] [2021-03-11 00:10:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:25,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325851925] [2021-03-11 00:10:25,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436728542] [2021-03-11 00:10:25,245 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) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:25,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:10:25,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:10:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:25,587 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:10:25,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:25,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:25,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:25,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:10:25,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:26,197 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-03-11 00:10:26,198 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-03-11 00:10:26,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:26,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:26,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:10:26,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:26,388 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 00:10:26,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:26,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:26,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:26,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:10:26,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:26,427 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:26,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:26,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:26,713 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 107 [2021-03-11 00:10:26,714 INFO L628 ElimStorePlain]: treesize reduction 20, result has 93.7 percent of original size [2021-03-11 00:10:26,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:26,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:26,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:10:26,732 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:26,867 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:10:26,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:26,883 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:26,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:10:26,885 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:27,012 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-11 00:10:27,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:27,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:27,027 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:27,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:10:27,029 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:27,169 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:10:27,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:27,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:27,186 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:27,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:10:27,187 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:27,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:27,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:27,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:10:27,200 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:27,401 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-03-11 00:10:27,402 INFO L628 ElimStorePlain]: treesize reduction 24, result has 89.1 percent of original size [2021-03-11 00:10:27,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:27,414 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:27,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:10:27,416 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:27,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:27,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:10:27,514 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:152 [2021-03-11 00:10:27,686 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-11 00:10:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:27,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:27,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:10:27,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109557525] [2021-03-11 00:10:27,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:27,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:27,744 INFO L87 Difference]: Start difference. First operand 1571 states and 5264 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:29,025 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:10:29,198 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:10:29,592 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-03-11 00:10:29,742 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:10:30,003 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-03-11 00:10:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:30,221 INFO L93 Difference]: Finished difference Result 2684 states and 8631 transitions. [2021-03-11 00:10:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:10:30,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:30,226 INFO L225 Difference]: With dead ends: 2684 [2021-03-11 00:10:30,227 INFO L226 Difference]: Without dead ends: 2654 [2021-03-11 00:10:30,227 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2663.8ms TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:10:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-03-11 00:10:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 1591. [2021-03-11 00:10:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3660377358490567) internal successors, (5352), 1590 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5352 transitions. [2021-03-11 00:10:30,266 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5352 transitions. Word has length 26 [2021-03-11 00:10:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:30,266 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5352 transitions. [2021-03-11 00:10:30,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5352 transitions. [2021-03-11 00:10:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:30,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:30,270 INFO L519 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] [2021-03-11 00:10:30,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:30,493 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:30,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:30,494 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 17 times [2021-03-11 00:10:30,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:30,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768494026] [2021-03-11 00:10:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:30,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768494026] [2021-03-11 00:10:30,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639231561] [2021-03-11 00:10:30,765 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 [2021-03-11 00:10:30,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:10:30,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:30,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:10:30,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:31,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:31,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:31,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:10:31,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:10:31,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:31,328 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:10:31,336 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:31,344 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:31,352 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:31,360 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:10:31,369 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:31,376 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:31,384 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:31,394 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:31,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:31,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:10:31,400 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:31,425 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-03-11 00:10:31,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:10:31,426 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-03-11 00:10:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:31,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:31,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:10:31,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167508459] [2021-03-11 00:10:31,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:10:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:31,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:10:31,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:10:31,460 INFO L87 Difference]: Start difference. First operand 1591 states and 5352 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:31,849 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-03-11 00:10:32,540 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-11 00:10:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:32,891 INFO L93 Difference]: Finished difference Result 2041 states and 6702 transitions. [2021-03-11 00:10:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:10:32,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:32,895 INFO L225 Difference]: With dead ends: 2041 [2021-03-11 00:10:32,895 INFO L226 Difference]: Without dead ends: 2020 [2021-03-11 00:10:32,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1429.9ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:10:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-03-11 00:10:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1632. [2021-03-11 00:10:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.3623543838136114) internal successors, (5484), 1631 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5484 transitions. [2021-03-11 00:10:32,917 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5484 transitions. Word has length 26 [2021-03-11 00:10:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:32,917 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 5484 transitions. [2021-03-11 00:10:32,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5484 transitions. [2021-03-11 00:10:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:32,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:32,920 INFO L519 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] [2021-03-11 00:10:33,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1053 [2021-03-11 00:10:33,121 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:33,121 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 18 times [2021-03-11 00:10:33,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:33,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993793500] [2021-03-11 00:10:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:33,300 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-11 00:10:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:33,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993793500] [2021-03-11 00:10:33,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932233615] [2021-03-11 00:10:33,500 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 [2021-03-11 00:10:33,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:10:33,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:10:33,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:34,106 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:34,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:10:34,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:34,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:34,132 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:34,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:10:34,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:34,306 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-11 00:10:34,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:34,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:34,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:34,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:10:34,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:34,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:34,358 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:34,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:10:34,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:34,522 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:10:34,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:34,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:34,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:34,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:10:34,553 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:34,577 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:34,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:10:34,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:34,729 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:10:34,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:34,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:34,759 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:34,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:10:34,761 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:34,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:34,783 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:34,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:10:34,786 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:34,931 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:10:34,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:34,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:10:34,950 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:329, output treesize:227 [2021-03-11 00:10:35,102 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-11 00:10:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:35,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:35,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:10:35,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972797138] [2021-03-11 00:10:35,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:35,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:35,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:35,146 INFO L87 Difference]: Start difference. First operand 1632 states and 5484 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:36,418 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-11 00:10:36,662 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-11 00:10:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:36,921 INFO L93 Difference]: Finished difference Result 2113 states and 6944 transitions. [2021-03-11 00:10:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:10:36,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:36,925 INFO L225 Difference]: With dead ends: 2113 [2021-03-11 00:10:36,926 INFO L226 Difference]: Without dead ends: 2084 [2021-03-11 00:10:36,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1995.4ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:10:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-03-11 00:10:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1629. [2021-03-11 00:10:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.3624078624078626) internal successors, (5474), 1628 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5474 transitions. [2021-03-11 00:10:36,949 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5474 transitions. Word has length 26 [2021-03-11 00:10:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:36,949 INFO L480 AbstractCegarLoop]: Abstraction has 1629 states and 5474 transitions. [2021-03-11 00:10:36,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5474 transitions. [2021-03-11 00:10:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:36,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:36,952 INFO L519 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] [2021-03-11 00:10:37,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:37,153 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 19 times [2021-03-11 00:10:37,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:37,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821642814] [2021-03-11 00:10:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:37,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821642814] [2021-03-11 00:10:37,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137657564] [2021-03-11 00:10:37,461 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 [2021-03-11 00:10:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:37,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:37,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:37,834 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:10:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:37,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:37,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:37,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:10:37,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:37,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:37,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:10:37,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:38,009 INFO L628 ElimStorePlain]: treesize reduction 116, result has 40.5 percent of original size [2021-03-11 00:10:38,009 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-03-11 00:10:38,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:10:38,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:38,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:38,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:38,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:38,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:10:38,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:38,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:38,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:10:38,077 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:24 [2021-03-11 00:10:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:38,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:38,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:10:38,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588125618] [2021-03-11 00:10:38,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:10:38,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:38,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:10:38,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:10:38,123 INFO L87 Difference]: Start difference. First operand 1629 states and 5474 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-03-11 00:10:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:38,587 INFO L93 Difference]: Finished difference Result 1830 states and 6039 transitions. [2021-03-11 00:10:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:10:38,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 26 [2021-03-11 00:10:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:38,590 INFO L225 Difference]: With dead ends: 1830 [2021-03-11 00:10:38,591 INFO L226 Difference]: Without dead ends: 1815 [2021-03-11 00:10:38,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 669.4ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-03-11 00:10:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1635. [2021-03-11 00:10:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.364137086903305) internal successors, (5497), 1634 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5497 transitions. [2021-03-11 00:10:38,612 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5497 transitions. Word has length 26 [2021-03-11 00:10:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:38,612 INFO L480 AbstractCegarLoop]: Abstraction has 1635 states and 5497 transitions. [2021-03-11 00:10:38,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-03-11 00:10:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5497 transitions. [2021-03-11 00:10:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:38,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:38,616 INFO L519 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] [2021-03-11 00:10:38,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-03-11 00:10:38,817 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 20 times [2021-03-11 00:10:38,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:38,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296938479] [2021-03-11 00:10:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:39,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296938479] [2021-03-11 00:10:39,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983680160] [2021-03-11 00:10:39,078 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:39,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:10:39,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:39,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,381 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:39,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:10:39,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:39,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2021-03-11 00:10:39,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,420 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:39,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 20 [2021-03-11 00:10:39,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:39,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-03-11 00:10:39,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,459 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:39,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:39,460 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,476 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:39,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:39,477 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,490 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:39,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:10:39,492 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,510 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:39,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 20 [2021-03-11 00:10:39,512 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,528 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:39,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:10:39,529 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,571 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:39,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:10:39,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,589 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:39,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:10:39,591 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:39,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-03-11 00:10:39,613 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,627 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:39,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:10:39,628 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,641 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:39,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:10:39,642 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,654 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:39,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:39,655 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:39,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,663 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:39,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:39,664 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,770 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:10:39,770 INFO L628 ElimStorePlain]: treesize reduction 27, result has 79.9 percent of original size [2021-03-11 00:10:39,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:10:39,771 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:697, output treesize:107 [2021-03-11 00:10:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:39,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:39,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:10:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285224611] [2021-03-11 00:10:39,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:39,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:39,895 INFO L87 Difference]: Start difference. First operand 1635 states and 5497 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:41,169 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2021-03-11 00:10:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:41,406 INFO L93 Difference]: Finished difference Result 2330 states and 7580 transitions. [2021-03-11 00:10:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:10:41,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:41,410 INFO L225 Difference]: With dead ends: 2330 [2021-03-11 00:10:41,410 INFO L226 Difference]: Without dead ends: 2284 [2021-03-11 00:10:41,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1487.9ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:10:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-03-11 00:10:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1679. [2021-03-11 00:10:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.365315852205006) internal successors, (5647), 1678 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5647 transitions. [2021-03-11 00:10:41,447 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5647 transitions. Word has length 26 [2021-03-11 00:10:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:41,448 INFO L480 AbstractCegarLoop]: Abstraction has 1679 states and 5647 transitions. [2021-03-11 00:10:41,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5647 transitions. [2021-03-11 00:10:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:41,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:41,452 INFO L519 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] [2021-03-11 00:10:41,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:41,667 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:41,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:41,668 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 21 times [2021-03-11 00:10:41,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:41,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796014514] [2021-03-11 00:10:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:41,893 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:10:42,028 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-03-11 00:10:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796014514] [2021-03-11 00:10:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117336659] [2021-03-11 00:10:42,177 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:42,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:10:42,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:42,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:42,642 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:10:42,933 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-03-11 00:10:43,014 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_158], 2=[A, v_prenex_157]} [2021-03-11 00:10:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:43,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:10:43,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:43,154 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:10:43,154 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-03-11 00:10:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:43,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:43,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:10:43,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:43,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:43,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:43,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:43,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:43,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:43,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:43,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:43,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:10:43,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:43,285 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-03-11 00:10:43,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:10:43,288 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-03-11 00:10:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:43,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:43,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:10:43,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61143023] [2021-03-11 00:10:43,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:43,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:43,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:43,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:43,336 INFO L87 Difference]: Start difference. First operand 1679 states and 5647 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:44,266 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:10:44,624 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-03-11 00:10:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:44,914 INFO L93 Difference]: Finished difference Result 2346 states and 7644 transitions. [2021-03-11 00:10:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:10:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:44,919 INFO L225 Difference]: With dead ends: 2346 [2021-03-11 00:10:44,919 INFO L226 Difference]: Without dead ends: 2289 [2021-03-11 00:10:44,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2016.5ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:10:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-03-11 00:10:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1714. [2021-03-11 00:10:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.3736135434909515) internal successors, (5779), 1713 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5779 transitions. [2021-03-11 00:10:44,947 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5779 transitions. Word has length 26 [2021-03-11 00:10:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:44,947 INFO L480 AbstractCegarLoop]: Abstraction has 1714 states and 5779 transitions. [2021-03-11 00:10:44,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5779 transitions. [2021-03-11 00:10:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:44,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:44,950 INFO L519 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] [2021-03-11 00:10:45,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1171,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:45,151 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 22 times [2021-03-11 00:10:45,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:45,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760107683] [2021-03-11 00:10:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:45,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760107683] [2021-03-11 00:10:45,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345955423] [2021-03-11 00:10:45,521 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:45,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:10:45,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:45,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:10:45,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:45,984 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:10:46,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:46,197 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:46,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 27 [2021-03-11 00:10:46,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:46,243 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:46,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-03-11 00:10:46,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:46,678 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 153 [2021-03-11 00:10:46,678 INFO L628 ElimStorePlain]: treesize reduction 153, result has 71.2 percent of original size [2021-03-11 00:10:46,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:46,709 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:46,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:10:46,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:46,894 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-03-11 00:10:46,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:46,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:46,922 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:46,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:10:46,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:47,106 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-03-11 00:10:47,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:47,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:47,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:47,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:10:47,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:47,484 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-03-11 00:10:47,484 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-03-11 00:10:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:47,511 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:47,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:10:47,513 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:47,680 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-11 00:10:47,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:47,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:47,710 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:47,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:10:47,713 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:47,886 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-11 00:10:47,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:47,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:47,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:10:47,917 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:47,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:47,931 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:10:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:47,933 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:48,211 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-03-11 00:10:48,212 INFO L628 ElimStorePlain]: treesize reduction 34, result has 88.2 percent of original size [2021-03-11 00:10:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:48,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:48,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:10:48,235 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:48,355 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-11 00:10:48,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:48,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:10:48,375 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-03-11 00:10:48,526 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:10:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:48,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:48,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:10:48,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651641817] [2021-03-11 00:10:48,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:48,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:48,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:48,595 INFO L87 Difference]: Start difference. First operand 1714 states and 5779 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:49,011 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:10:49,781 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-11 00:10:50,168 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:10:50,369 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:10:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:50,587 INFO L93 Difference]: Finished difference Result 2805 states and 9046 transitions. [2021-03-11 00:10:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:10:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:50,593 INFO L225 Difference]: With dead ends: 2805 [2021-03-11 00:10:50,593 INFO L226 Difference]: Without dead ends: 2750 [2021-03-11 00:10:50,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2224.2ms TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:10:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-03-11 00:10:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1711. [2021-03-11 00:10:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.374269005847953) internal successors, (5770), 1710 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 5770 transitions. [2021-03-11 00:10:50,620 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 5770 transitions. Word has length 26 [2021-03-11 00:10:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:50,620 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 5770 transitions. [2021-03-11 00:10:50,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 5770 transitions. [2021-03-11 00:10:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:50,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:50,623 INFO L519 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] [2021-03-11 00:10:50,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1184,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:50,824 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:50,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 23 times [2021-03-11 00:10:50,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:50,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832699996] [2021-03-11 00:10:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:51,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832699996] [2021-03-11 00:10:51,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497856384] [2021-03-11 00:10:51,221 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:51,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:10:51,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:51,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:10:51,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:51,844 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-03-11 00:10:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:52,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:10:52,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,055 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:52,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:10:52,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,465 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-03-11 00:10:52,466 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.2 percent of original size [2021-03-11 00:10:52,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,484 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:52,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:10:52,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:52,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:10:52,504 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,708 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:10:52,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:52,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:10:52,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,743 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:52,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:10:52,745 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,914 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:10:52,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:52,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:10:52,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,950 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:52,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:10:52,952 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:53,101 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:10:53,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:53,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:53,118 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:53,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:10:53,119 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:53,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:53,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:53,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:10:53,135 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:53,267 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:10:53,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:53,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-11 00:10:53,273 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:391, output treesize:176 [2021-03-11 00:10:53,403 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-11 00:10:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:53,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:53,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:10:53,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081250098] [2021-03-11 00:10:53,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:10:53,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:53,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:10:53,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:10:53,456 INFO L87 Difference]: Start difference. First operand 1711 states and 5770 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:54,592 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-03-11 00:10:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:54,845 INFO L93 Difference]: Finished difference Result 2323 states and 7626 transitions. [2021-03-11 00:10:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:10:54,845 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:54,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:54,850 INFO L225 Difference]: With dead ends: 2323 [2021-03-11 00:10:54,850 INFO L226 Difference]: Without dead ends: 2277 [2021-03-11 00:10:54,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1909.1ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:10:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-03-11 00:10:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1711. [2021-03-11 00:10:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.374269005847953) internal successors, (5770), 1710 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 5770 transitions. [2021-03-11 00:10:54,892 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 5770 transitions. Word has length 26 [2021-03-11 00:10:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:54,892 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 5770 transitions. [2021-03-11 00:10:54,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 5770 transitions. [2021-03-11 00:10:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:54,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:54,895 INFO L519 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] [2021-03-11 00:10:55,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1224 [2021-03-11 00:10:55,096 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash -39476015, now seen corresponding path program 42 times [2021-03-11 00:10:55,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:55,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393613520] [2021-03-11 00:10:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:55,294 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:10:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393613520] [2021-03-11 00:10:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789017839] [2021-03-11 00:10:55,622 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:55,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:10:55,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:55,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:10:56,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:10:56,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:10:56,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:56,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:10:56,450 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:10:56,460 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:56,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:56,479 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:10:56,489 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:10:56,499 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:10:56,523 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:10:56,533 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:10:56,543 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:56,553 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:56,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:56,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:10:56,559 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:56,585 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-03-11 00:10:56,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:10:56,586 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:10:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:56,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:56,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:10:56,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801523643] [2021-03-11 00:10:56,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:56,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:56,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:56,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:56,617 INFO L87 Difference]: Start difference. First operand 1711 states and 5770 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:57,828 INFO L93 Difference]: Finished difference Result 2167 states and 7120 transitions. [2021-03-11 00:10:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:10:57,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:57,834 INFO L225 Difference]: With dead ends: 2167 [2021-03-11 00:10:57,834 INFO L226 Difference]: Without dead ends: 2141 [2021-03-11 00:10:57,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1401.8ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:10:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-03-11 00:10:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1715. [2021-03-11 00:10:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 3.372228704784131) internal successors, (5780), 1714 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 5780 transitions. [2021-03-11 00:10:57,858 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 5780 transitions. Word has length 26 [2021-03-11 00:10:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:57,858 INFO L480 AbstractCegarLoop]: Abstraction has 1715 states and 5780 transitions. [2021-03-11 00:10:57,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 5780 transitions. [2021-03-11 00:10:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:57,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:57,861 INFO L519 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] [2021-03-11 00:10:58,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1260 [2021-03-11 00:10:58,062 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:58,062 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-03-11 00:10:58,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:58,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619866925] [2021-03-11 00:10:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:58,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619866925] [2021-03-11 00:10:58,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146531580] [2021-03-11 00:10:58,534 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:10:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:58,895 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-11 00:10:58,962 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_191, v_prenex_193], 5=[A, v_prenex_189]} [2021-03-11 00:10:58,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:58,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:58,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:10:58,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:58,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:58,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:58,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:10:58,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:59,088 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-11 00:10:59,089 INFO L628 ElimStorePlain]: treesize reduction 128, result has 41.0 percent of original size [2021-03-11 00:10:59,089 INFO L518 ElimStorePlain]: Eliminatee v_prenex_193 vanished before elimination [2021-03-11 00:10:59,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:59,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:10:59,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:59,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:59,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:59,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-11 00:10:59,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:59,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:59,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:10:59,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-03-11 00:10:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:59,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:59,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:10:59,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932760241] [2021-03-11 00:10:59,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:59,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:59,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:59,216 INFO L87 Difference]: Start difference. First operand 1715 states and 5780 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:01,609 INFO L93 Difference]: Finished difference Result 2392 states and 7841 transitions. [2021-03-11 00:11:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:11:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:01,615 INFO L225 Difference]: With dead ends: 2392 [2021-03-11 00:11:01,615 INFO L226 Difference]: Without dead ends: 2377 [2021-03-11 00:11:01,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2341.7ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:11:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2021-03-11 00:11:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1721. [2021-03-11 00:11:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.3738372093023257) internal successors, (5803), 1720 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5803 transitions. [2021-03-11 00:11:01,644 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5803 transitions. Word has length 26 [2021-03-11 00:11:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:01,644 INFO L480 AbstractCegarLoop]: Abstraction has 1721 states and 5803 transitions. [2021-03-11 00:11:01,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5803 transitions. [2021-03-11 00:11:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:01,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:01,648 INFO L519 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] [2021-03-11 00:11:01,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-03-11 00:11:01,863 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:01,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 24 times [2021-03-11 00:11:01,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:01,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640037955] [2021-03-11 00:11:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:02,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640037955] [2021-03-11 00:11:02,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050460406] [2021-03-11 00:11:02,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:02,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:11:02,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:11:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:02,783 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:11:03,427 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:03,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:11:03,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:03,459 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:11:03,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:11:03,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:03,911 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 128 [2021-03-11 00:11:03,912 INFO L628 ElimStorePlain]: treesize reduction 72, result has 84.9 percent of original size [2021-03-11 00:11:03,938 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:11:03,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:11:03,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:04,147 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-11 00:11:04,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:04,175 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:11:04,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:11:04,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:04,379 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-11 00:11:04,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:04,404 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:11:04,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:11:04,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:04,606 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-11 00:11:04,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:04,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:11:04,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:04,652 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:04,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:11:04,654 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:05,020 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-03-11 00:11:05,020 INFO L628 ElimStorePlain]: treesize reduction 23, result has 93.3 percent of original size [2021-03-11 00:11:05,048 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:11:05,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:11:05,053 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:05,221 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-11 00:11:05,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:05,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:05,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:11:05,247 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:05,407 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-11 00:11:05,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:05,435 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:11:05,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:11:05,437 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:05,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:05,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:11:05,460 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:05,751 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-03-11 00:11:05,751 INFO L628 ElimStorePlain]: treesize reduction 31, result has 88.7 percent of original size [2021-03-11 00:11:05,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:11:05,764 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:404 [2021-03-11 00:11:05,979 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-03-11 00:11:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:06,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:06,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:11:06,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410665736] [2021-03-11 00:11:06,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:11:06,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:11:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:11:06,115 INFO L87 Difference]: Start difference. First operand 1721 states and 5803 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:06,784 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-03-11 00:11:07,112 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2021-03-11 00:11:07,376 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-03-11 00:11:07,560 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:11:07,814 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-11 00:11:07,978 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-03-11 00:11:08,248 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-03-11 00:11:08,555 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:11:08,784 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-03-11 00:11:09,238 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-03-11 00:11:09,624 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2021-03-11 00:11:10,118 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-03-11 00:11:10,845 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 93 [2021-03-11 00:11:11,626 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-03-11 00:11:11,946 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-03-11 00:11:12,753 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2021-03-11 00:11:13,219 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-03-11 00:11:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:13,492 INFO L93 Difference]: Finished difference Result 2749 states and 8697 transitions. [2021-03-11 00:11:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:11:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:13,499 INFO L225 Difference]: With dead ends: 2749 [2021-03-11 00:11:13,499 INFO L226 Difference]: Without dead ends: 2685 [2021-03-11 00:11:13,499 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 7527.2ms TimeCoverageRelationStatistics Valid=471, Invalid=2181, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:11:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-03-11 00:11:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1753. [2021-03-11 00:11:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.384132420091324) internal successors, (5929), 1752 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5929 transitions. [2021-03-11 00:11:13,532 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5929 transitions. Word has length 26 [2021-03-11 00:11:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:13,532 INFO L480 AbstractCegarLoop]: Abstraction has 1753 states and 5929 transitions. [2021-03-11 00:11:13,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5929 transitions. [2021-03-11 00:11:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:13,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:13,535 INFO L519 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] [2021-03-11 00:11:13,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1388,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:13,736 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:13,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:13,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1125767463, now seen corresponding path program 25 times [2021-03-11 00:11:13,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:13,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425886585] [2021-03-11 00:11:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:13,955 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-11 00:11:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:14,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425886585] [2021-03-11 00:11:14,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907654117] [2021-03-11 00:11:14,175 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:11:14,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:14,574 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:11:14,776 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-03-11 00:11:14,871 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_232], 2=[A, v_prenex_231]} [2021-03-11 00:11:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:14,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:11:14,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:15,024 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:11:15,024 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-03-11 00:11:15,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:15,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:15,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:11:15,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:15,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:15,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:11:15,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:15,113 INFO L628 ElimStorePlain]: treesize reduction 15, result has 81.5 percent of original size [2021-03-11 00:11:15,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:15,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:15,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:11:15,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:15,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:15,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:11:15,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-03-11 00:11:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:15,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:15,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:11:15,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990163198] [2021-03-11 00:11:15,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:15,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:15,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:15,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:15,204 INFO L87 Difference]: Start difference. First operand 1753 states and 5929 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:16,401 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-11 00:11:16,788 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-03-11 00:11:16,961 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-03-11 00:11:17,246 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-03-11 00:11:17,658 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-03-11 00:11:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:18,019 INFO L93 Difference]: Finished difference Result 2673 states and 8553 transitions. [2021-03-11 00:11:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:11:18,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:18,023 INFO L225 Difference]: With dead ends: 2673 [2021-03-11 00:11:18,023 INFO L226 Difference]: Without dead ends: 2628 [2021-03-11 00:11:18,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2841.6ms TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:11:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-03-11 00:11:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 1772. [2021-03-11 00:11:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.3969508752117448) internal successors, (6016), 1771 states have internal predecessors, (6016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6016 transitions. [2021-03-11 00:11:18,047 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6016 transitions. Word has length 26 [2021-03-11 00:11:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:18,047 INFO L480 AbstractCegarLoop]: Abstraction has 1772 states and 6016 transitions. [2021-03-11 00:11:18,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6016 transitions. [2021-03-11 00:11:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:18,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:18,049 INFO L519 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] [2021-03-11 00:11:18,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1466 [2021-03-11 00:11:18,258 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 26 times [2021-03-11 00:11:18,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:18,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080615850] [2021-03-11 00:11:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:18,441 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-03-11 00:11:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:18,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080615850] [2021-03-11 00:11:18,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823374055] [2021-03-11 00:11:18,626 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:18,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:11:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:18,925 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:18,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:11:18,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:18,939 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:18,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:11:18,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:18,966 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:11:18,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:11:18,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,007 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:11:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:11:19,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:19,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-03-11 00:11:19,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,051 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:19,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:11:19,052 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,068 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:19,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:11:19,069 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,093 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:11:19,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:11:19,095 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,109 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:19,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:11:19,110 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,138 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:11:19,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:11:19,144 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,158 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:19,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:11:19,160 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,181 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:19,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:11:19,183 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,210 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:11:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-03-11 00:11:19,212 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,225 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:19,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:11:19,226 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:19,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:11:19,254 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,264 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:11:19,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:11:19,266 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:19,466 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-11 00:11:19,467 INFO L628 ElimStorePlain]: treesize reduction 60, result has 75.1 percent of original size [2021-03-11 00:11:19,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:11:19,468 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:797, output treesize:181 [2021-03-11 00:11:19,722 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:11:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:19,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:19,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-03-11 00:11:19,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174627400] [2021-03-11 00:11:19,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:11:19,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:11:19,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:11:19,866 INFO L87 Difference]: Start difference. First operand 1772 states and 6016 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:20,335 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-11 00:11:20,845 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-03-11 00:11:21,804 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:11:22,118 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-03-11 00:11:22,422 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-03-11 00:11:22,713 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:11:23,007 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:11:23,149 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:11:23,304 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2021-03-11 00:11:23,491 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-03-11 00:11:23,771 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-03-11 00:11:23,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:23,886 INFO L93 Difference]: Finished difference Result 3469 states and 10718 transitions. [2021-03-11 00:11:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:11:23,887 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:23,887 INFO L225 Difference]: With dead ends: 3469 [2021-03-11 00:11:23,887 INFO L226 Difference]: Without dead ends: 0 [2021-03-11 00:11:23,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 3947.4ms TimeCoverageRelationStatistics Valid=532, Invalid=2120, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:11:23,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-11 00:11:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-11 00:11:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-11 00:11:23,888 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-03-11 00:11:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:23,888 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-11 00:11:23,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-11 00:11:23,888 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-11 00:11:24,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-03-11 00:11:24,092 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:11:24 BasicIcfg [2021-03-11 00:11:24,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:11:24,093 INFO L168 Benchmark]: Toolchain (without parser) took 181794.08 ms. Allocated memory was 255.9 MB in the beginning and 662.7 MB in the end (delta: 406.8 MB). Free memory was 236.5 MB in the beginning and 333.2 MB in the end (delta: -96.7 MB). Peak memory consumption was 309.5 MB. Max. memory is 16.0 GB. [2021-03-11 00:11:24,093 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:11:24,093 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.63 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:11:24,093 INFO L168 Benchmark]: Boogie Preprocessor took 24.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-11 00:11:24,093 INFO L168 Benchmark]: RCFGBuilder took 336.43 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 235.8 MB in the end (delta: -2.3 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.0 GB. [2021-03-11 00:11:24,093 INFO L168 Benchmark]: TraceAbstraction took 181392.81 ms. Allocated memory was 255.9 MB in the beginning and 662.7 MB in the end (delta: 406.8 MB). Free memory was 235.3 MB in the beginning and 333.2 MB in the end (delta: -97.9 MB). Peak memory consumption was 307.8 MB. Max. memory is 16.0 GB. [2021-03-11 00:11:24,094 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 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.63 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 336.43 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 235.8 MB in the end (delta: -2.3 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 181392.81 ms. Allocated memory was 255.9 MB in the beginning and 662.7 MB in the end (delta: 406.8 MB). Free memory was 235.3 MB in the beginning and 333.2 MB in the end (delta: -97.9 MB). Peak memory consumption was 307.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 65]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 181319.3ms, OverallIterations: 72, TraceHistogramMax: 2, EmptinessCheckTime: 174.5ms, AutomataDifference: 99943.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2825 SDtfs, 15085 SDslu, 20819 SDs, 0 SdLazy, 35822 SolverSat, 2477 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20616.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3670 GetRequests, 1325 SyntacticMatches, 69 SemanticMatches, 2276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25970 ImplicationChecksByTransitivity, 97766.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1772occurred in iteration=71, InterpolantAutomatonStates: 1876, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1724.1ms AutomataMinimizationTime, 72 MinimizatonAttempts, 54942 StatesRemovedByMinimization, 71 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 271.3ms SsaConstructionTime, 917.1ms SatisfiabilityAnalysisTime, 62212.3ms InterpolantComputationTime, 3478 NumberOfCodeBlocks, 3478 NumberOfCodeBlocksAsserted, 218 NumberOfCheckSat, 3337 ConstructedInterpolants, 57 QuantifiedInterpolants, 67157 SizeOfPredicates, 316 NumberOfNonLiveVariables, 4344 ConjunctsInSsa, 1087 ConjunctsInUnsatCore, 141 InterpolantComputations, 3 PerfectInterpolantSequences, 107/750 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 proved your program to be correct! Received shutdown request...